Nabble - Octave - Graphics

Set title to left corner doesnt work

2009-08-11T03:37:32Z

Hi folks!

I'd like to set the horizontal postition of the title in my plot to the left corner.
When I plot and do this:

title("This is my awesome title");
yl = get (gca (), 'title');
get(get(gca()).title).horizontalalignment
set (yl, 'horizontalalignment', 'center');
get(get(gca()).title).horizontalalignment
set (yl, 'horizontalalignment', 'left');
get(get(gca()).title).horizontalalignment

the output is

ans = left
ans = center
ans = left

So it seems that the value is set to "left" as default. Even setting it to "center" and to "left" afterwards doesnt have any effetct, the title remains in the center. Do I miss something here?

Thanks!
David

unique top title on multiple plot graphs

2009-08-05T02:43:44Z

Hi everybody,
I can't find the way to set a unique title on graphics composed of multiple plots.
To be more precise when I set the plot figure as:

subplot(2,1,1)
plot(x1,y1)
subplot(2,2,2)
plot(x2,y2)

I am not able to set a unique title at the top of the figure, describing both the plots.
I found the function "top_title.m" which seems to make this job but it is not compatible with octave 3.0.0, the version I'm using.

Thanks everybody,
cheers

Controlling quality of 3d plot

2009-05-17T16:54:57Z

Hi,
I was wondering how I can get a better quality images with octave.
Here is an example of image produce with matlab

Screenshot-Matlab.png

And the same code produced a terrible picture with octave:

Screenshot-Octave.png

I would like to change the sampling rate of the slices, and also be able to control the fonts displaying.

I use octave 3.0.5 on debian squeeze,
I attached also the code to produce the above plots
Class_12_May.m

Thanks in advance for any help,
Oz.

Controlling quality of 3d plot

2009-05-17T16:51:56Z

Hi,
I was wondering how I can get a better quality images with octave.
Here is an example of image produce with matlab

And the same code produced a terrible picture with octave:

I would like to change the sampling rate of the slices, and also be able to control the fonts displaying.

I use octave 3.0.5 on debian,
I attached also the code to produce the above plots
Class_12_May.m

sorry- cross post - polar plots

2009-05-16T14:17:31Z

Sorry, but I posted a question about graphics in "General". If someone wants to look there; I'd appreciate some help.
Kurt

QtOctave

2009-04-27T08:14:01Z

Hi. This is my first post.

I have started using octave quite recently as an alternative to the rather expensive matlab.

So, I am trying to plot a 3-D plot and would like to change the alignment of the z-axis label (zlabel). Right now it is horzontal and I would like it to be vertical. So after much searching I found the many solutions to this using the "rotate by" part of the label function. I kept on getting errors every time I used it and actually found that just using the syntax:

"set zlabel "Z-AXIS"

This gives me an error as follows:

parse error:

syntax error

>>> set zlabel "zlabel"

This is where I think the general problem is. For some reason, my QtOctave and normal octave run from the terminal has a problem when I use the set function in the way shown above. If I use the function form it works fine:

zlabel("Z-AXIS",'FontSize',18);

Please can somebody explain what is going on here?

Waterfall plots in Octave/Gnuplot

2009-02-02T10:48:15Z

Hi, just wondering if anyone here has created Waterfall plots in Octave/Gnulab. If so, what kind of performance did you get?

-What frequency spectrum did you plot?
-How many "slices" did you plot?
-What resolution on the frequency axis did you use?
-How long did each plot take?

Thanks,
Alexander

Maximum size for mesh()

2009-01-29T15:17:30Z

Hi everyone, is there a maximum meshgrid size for the mesh() function? These commands produce the expected output:

x = [0:0.1:5];
y = [0:0.1:10];
[xx,yy] = meshgrid(x,y);
z = sin(xx).*sin(yy);
mesh(x,y,z);

But these commands either give no results, or cause octave to hang:

x = [0:0.1:50];
y = [0:0.1:100];
[xx,yy] = meshgrid(x,y);
z = sin(xx).*sin(yy);
mesh(x,y,z);

Re: Xlabel does not appear in Figure

2009-01-10T21:59:48Z

"When I execute xlabel, ylabel or title (as per below), there is no change happening in Figure 1.0 (java based) window. Why?"

Similarly, the example from the docs, 15.1.3, was copied to an m file, and all text failed. An upgrade to the 3.0.3 binary for XP, jhands, followed with same results. Tried set & properties as have done in other application, with no joy.

It is quite disappointing when the exact directions sample bombs.

Re: How to update a figure while running Octave in terminal

2009-01-05T19:40:50Z

Have you tried adding the command drawnow after the plot command that updates the plot?

AlexRSS wrote:

Amazingly ignorant question... I'm running Octave using the terminal in OSX. I have a function that initializes a figure, then calls another function that imagesc's a matrix in that figure. On every iteration of the function a new matrix should be printed to the figure. Presently the figure only updates after the entire function has run. The figure should update continuously while the function is running. How can I get a figure to update continuously during a function run while running Octave in the terminal?

Thanks!

Alex

How to update a figure while running Octave in terminal

2008-12-28T20:45:36Z

Amazingly ignorant question... I'm running Octave using the terminal in OSX. I have a function that initializes a figure, then calls another function that imagesc's a matrix in that figure. On every iteration of the function a new matrix should be printed to the figure. Presently the figure only updates after the entire function has run. The figure should update continuously while the function is running. How can I get a figure to update continuously during a function run while running Octave in the terminal?

Thanks!

Alex

Re: Octivate - GUI in Mono/C#

2008-11-19T06:53:57Z

HELLO

i m trying to interface C# and octave. I've downloaded the octivate 0.0.1-1 but I did'nt find the C library "liboctivate.so". I have a windows operating system.

can somebody tell me where to find it or how to create it?

thanks in advance

Matthew C Ruschmann wrote:

I recently embarked on a journey to familiarize myself with C# and Mono.
As a learning experience, I designed a GUI to the GNU Octave engine.
The project, called Octivate, has fostered my interest over the past
week and has grown consequently. The project has become more than a
simple learning experience. Hence, I have created a place for it on
Source Forge (http://octivate.sf.net) and plan to pursue further
development during my spare time.

The project, for the most part, consists of a C library (liboctivate), a
C# class library (octave-sharp), and the main assembly (octivate).

liboctivate – a library written in C/C++ (based on Paul Kienzle's
octave_embed).
The focus of this library is to handle the relatively complex set of
functions, variables, and streams. This could possibly be implemented
directly through octave-sharp, but (as this was only a learning
experience) this method was quicker and dealt with simpler P/Invokes.
I'm not sure if C# (and P/Invoke) is compatible with C++ streams or
capable of managing classes and variable in a C library.
With a few improvements, this library could be easily integrated into
other applications wishing to interface the Octave engine.

octave-sharp – a C# class library. This library manages an Octave
session through liboctivate. It's currently a rather small and simple
library, but allows for a separate layer of abstraction and availability
to other C# assemblies.

octivate – The actual GUI written using Mono, gtk, and glade. It
behaves nicely, but still has a few bugs interacting with the Octave
engine. (These are problems in octave-sharp but don't seem to appear
accessing liboctivate from C++)

If anyone is interested in using the code, feel free. It is licensed
under the GPL. If you are interested in contributing, feel free to
contact me. Hopefully, I will have free time to further mature this
project over the next few weeks.

Thank you for you time,
Matthew C. Ruschmann

Plotting stock charts and indicators

2008-11-12T14:54:51Z

I would like to plot stock and commodity prices, along with indicators calculated using Octave, the final result looking similar to the image below.

This chart was generated in Gnuplot using the script file below

reset
set title "Gold Prices, MAMA & FAMA Trendlines, Fisher CCI & Normal CCI"
set datafile separator ","
set xdata time
set timefmt "%d-%m-%y"
set grid
set lmargin 1
set format x ""
set multiplot
set size 1, 0.7
set origin 0, 0.3
plot "Gold.csv" using 1:2:3:4:5 notitle with candlesticks lt 3, \
'Gold.csv' using 1:20 title 'MAMA' with lines lt 1, \
'Gold.csv' using 1:21 title 'FAMA' with lines lt 2
unset title
set size 1.0, 0.3
set origin 0.0, 0.0
set lmargin 1
set bmargin
set format x
unset grid
Zeroline(x) = 0
Plus100(x) = 100
Minus100(x) = -100
plot 'Gold.csv' using 1:33 title 'Fisher CCI' with lines lt 3, \
'Gold.csv' using 1:34 title 'Normal CCI' with lines lt 1, \
Zeroline(x) notitle lt 3, Plus100(x) notitle lt 3, Minus100(x) notitle lt 3
unset multiplot

where the dates, prices and indicator values are stored in the file "Gold.csv" (after having been calculated and then exported from a spreadsheet). If these were stored/calculated in Octave, the values to plot would be in named vectors and my question is: is it possible to plot such a graph in Gnuplot directly via Octave through native Octave plotting functions (from my reading of the manual I don't think it is), by piping the above script to Gnuplot (I don't know how), or do I have to export the data from Octave into a file to be read by the above script, as I am currently doing with the spreadsheet?

accents in a plot

2008-10-28T02:07:27Z

Hello,

How could I use special characters (like accents) in a plot?
When I use an accent in xlabel, for example, I get some weird characters or garbage instead of the accent I was trying to type.
Am I doing something wrong? Is there any workaround to this?
In Octave 2.1.73 I was using
__gnuplot_set__ encoding iso_8859_15
as a workaround and it worked pretty well. But now this __whatever__ commands seem to be deprecated...

I'm using Octave 3.02 and my system default encoding is UTF8.

Best regards.

Re: imshow problems

2008-09-28T11:35:15Z

Octave version is 3.0.2 from OpenSUSE 11.0 science repository. Complete m-file attached
C.m

dbateman wrote:

kiltanen wrote:

I'm trying to get octave draw fractal with following command:
imshow(A,'Colormap',[1,0,0;0,1,0;0,0,1]) ;A is 1000x1000 matrix of complex numbers and whole command something that course assinstants told to use in matlab. Output is supposed to be color image but octave gives black image with grey background. How i get octave to draw fractal as color image? Assingment has to be returned by 29.9.2008 12 o'clock finnish time.

What version of Octave and gnuplot are you using? imshow changes in 3.0.1 and so maybe a newer version of Octave will fix the issue. In any case maybe if you can save the matrix or the code to calculate it and perhaps someone might look more closely at the issue.. Ask very nicely and they might even give you a png with the plot :-)

D.

Re: imshow problems

2008-09-28T10:57:01Z

kiltanen wrote:

I'm trying to get octave draw fractal with following command:
imshow(A,'Colormap',[1,0,0;0,1,0;0,0,1]) ;A is 1000x1000 matrix of complex numbers and whole command something that course assinstants told to use in matlab. Output is supposed to be color image but octave gives black image with grey background. How i get octave to draw fractal as color image? Assingment has to be returned by 29.9.2008 12 o'clock finnish time.

What version of Octave and gnuplot are you using? imshow changes in 3.0.1 and so maybe a newer version of Octave will fix the issue. In any case maybe if you can save the matrix or the code to calculate it and perhaps someone might look more closely at the issue.. Ask very nicely and they might even give you a png with the plot :-)

D.

imshow problems

2008-09-28T09:54:20Z

I'm trying to get octave draw fractal with following command:
imshow(A,'Colormap',[1,0,0;0,1,0;0,0,1]) ;A is 1000x1000 matrix of complex numbers and whole command something that course assinstants told to use in matlab. Output is supposed to be color image but octave gives black image with grey background. How i get octave to draw fractal as color image? Assingment has to be returned by 29.9.2008 12 o'clock finnish time.

problems wit imread

2008-08-23T16:10:35Z

Hello all !!
I've problems when I try to use the imread function...(octave3.0)
I've already installed octplot, gnuplot,octave-plplot and already installed the library "image-1.0.6.tar.gz" from octave-forge.
When I write imshow("default.img"); all is ok and appears a screen with the image default.img (the img format is ok), but when I try to show images jpg, png and gif appear the next error:

error: load: /home/gerardo/Escritorio/a.jpg: inconsistent number of columns near line 3
error: load: unable to extract matrix size from file `/home/gerardo/Escritorio/a.jpg'
error: evaluating assignment expression near line 47, column 8
error: called from `loadimage' in file `/usr/share/octave/3.0.0/m/image/loadimage.m'
error: evaluating if command near line 66, column 3
error: called from `imshow' in file `/usr/share/octave/3.0.0/m/image/imshow.m'

please i need to work with octave!! in this forum is all my hope !!
note: I don't speak english very well, only a little...
I speak only Spanish, I apologize if I am wrong
Thanks

Octave 3.0 plot arrows

2008-07-31T09:48:49Z

Hello,

I am using Octave 3.0.0 on a windows xp with gnuplot as graphics backend. I have a list of x,y values in a file named "from.dat" and "to.dat". I need to plot arrows with the tail at "from" and the head at "to".

I was able to do this pre 3.0.0 using the function arrow.m pasted below. But is not working anymore in 3.0.0 and giving the following error.

parse error:

syntax error

>>> __gnuplot_set__ arrow 1 from 0.000000,0.000000 to 0.020000,-0.200000

Any help will be greatly appreciated. Thanks in Advance!

Rohit

function arrow(strt, endmat, minxy, maxxy)

if(nargin<2)
error("arrow: Number of input parameters must be 2");
endif

[nr_strt, nc_strt] = size(strt);
[nr_end, nc_end] = size(endmat);

if(nr_strt!=nr_end)
error("arrow: Input arguments must have equal number of rows");
endif

if(nc_strt!=2 || nc_end!=nc_strt)
error("arrow: Input matrices must have 2 columns");
endif

minx = min([min(strt(:,1)) min(endmat(:,1))]);
miny = min([min(strt(:,2)) min(endmat(:,2))]);
maxx = max([max(strt(:,1)) max(endmat(:,1))]);
maxy = max([max(strt(:,2)) max(endmat(:,2))]);

__gnuplot_set__ nokey;
if(nargin==4)
eval(sprintf("__gnuplot_set__ xrange [%f:%f] ",minxy(1),maxxy(1)));
eval(sprintf("__gnuplot_set__ yrange [%f:%f] ",minxy(2),maxxy(2)));
else
eval(sprintf("__gnuplot_set__ xrange [%f:%f] ",minx,maxx));
eval(sprintf("__gnuplot_set__ yrange [%f:%f] ",miny,maxy));
endif

for i=1:nr_strt
eval(sprintf("__gnuplot_set__ arrow %d from %f,%f to %f,%f\n",i,strt(i,1),strt(i,2),endmat(i,1),endmat(i,2)));
endfor
plot((minx+maxx)/2,(miny+maxy)/2);

endfunction

Multiple mesh plot with legend

2008-07-09T04:46:37Z

Hi

Can somebody please assist me to plot a multiple mesh plot with a correct legend.
So far the following works to plot all the mesh plots in one window on one axis...

mesh(x,y,z)
hold
mesh(i,j,k)

However, I can not manage to add a legend that describes each mesh. The figure just displays
line 1, line2, etc with the colour of the line.

I would like to rename these "lines".

Regards
Xandri

octave GUI interface

2008-06-21T05:40:59Z

I used matlab for a while just to find out that matlab/simulink integration does not
allow enough flexibility for some engineering applications I am interested it. Then,
I wrote a short interpreter to deal with it just to get in situation to be more of a
programmer than engineer so I looked at other alternatives like lua, cint, python,
octave, itd and decided that octave has most of the features that I need including
similarity with matlab. Although it was not designed with GUI in mind it can be
integrated with any GUI framework very easily with some minor issues and
without modifying or even recompiling octave or using pipes or networking.
Adding a QT GUI front end took me about an afternoon. I liked this fact very
much. The main problem I have is that octave console commands do not behave
the same as when they are called when linking to octave libraries. For example,
whos and pkg commands return data very hard to interpret if at all. Before I dive
into octave source code, I would appreciate if anybody would share their
experience with similar approaches. I can intercept the return values and
reformat them but I do not even know what some commands are returning. If I
find an acceptable solution to these issues, I will commit significant time to
integrating my project with octave and in the process develop a general,
matlab like, interface to octave and try to formulate a generic framework for a
simulink like but more flexible interface.

Anybody with any experience or interest in working together feel free to send
me either e-mail or respond to this forum. Pointers to any relevant documentation
would also be greatly appreciated.

Properties for mesh, surf, surface

2008-06-14T12:45:47Z

Hello,

I'm trying to plot some intersecting surfaces (isocline surfaces in a 3 equation dynamic system). Is there a way to make each surface use a different line color for the generated grid?

Thanks,

John.

octplot

2008-04-30T11:04:54Z

Hi Everybody,

I have difficulty in plotting the right style (as I wish) of line in octave using gnuplot s I tried to install octplot. Unfortunately, octplot does not appear in my fink list, I guess because I am using Leopard!? So I tried to install the code myself using the code available on net:

http://sourceforge.net/project/showfiles.php?group_id=86268.

So everything went well with configure but there was a problem with make command:

patch.cpp:149: error: invalid conversion from ‘GLvoid (*)(...)’ to ‘void (*)()’
patch.cpp:149: error: initializing argument 3 of ‘void gluTessCallback(GLUtesselator*, GLenum, void (*)())’
patch.cpp:151: error: invalid conversion from ‘GLvoid (*)(...)’ to ‘void (*)()’
patch.cpp:151: error: initializing argument 3 of ‘void gluTessCallback(GLUtesselator*, GLenum, void (*)())’
patch.cpp:153: error: invalid conversion from ‘GLvoid (*)(...)’ to ‘void (*)()’
patch.cpp:153: error: initializing argument 3 of ‘void gluTessCallback(GLUtesselator*, GLenum, void (*)())’
patch.cpp:155: error: invalid conversion from ‘GLvoid (*)(...)’ to ‘void (*)()’
patch.cpp:155: error: initializing argument 3 of ‘void gluTessCallback(GLUtesselator*, GLenum, void (*)())’
patch.cpp:157: error: invalid conversion from ‘GLvoid (*)(...)’ to ‘void (*)()’
patch.cpp:157: error: initializing argument 3 of ‘void gluTessCallback(GLUtesselator*, GLenum, void (*)())’
patch.cpp:159: error: invalid conversion from ‘GLvoid (*)(...)’ to ‘void (*)()’
patch.cpp:159: error: initializing argument 3 of ‘void gluTessCallback(GLUtesselator*, GLenum, void (*)())’
make[2]: *** [octplot-patch.o] Error 1
make[1]: *** [all-recursive] Error 1
make: *** [all] Error 2

and as you can guess I have no idea how to fix this!?

Thanks.

gdImageStringFT: Could not find/open font while printing string values of mean with font Helvetica

2008-04-27T15:18:42Z

Can anybody help me what to do when I get the following error when trying to print to a .png file?

gdImageStringFT: Could not find/open font while printing string value with font Helvetica
?

I have searched the internet, but nothing seems to help..

The problem arose after i upgraded to ubuntu 8.04 from 7.10

/Peter

gdImageStringFT: Could not find/open font while printing string values of mean with font Helvetica

2008-04-25T15:33:22Z

Xlabel does not appear in Figure

2008-04-16T04:40:42Z

Hello,

I am newbie to Octave. There are some discussion about xlabel, but couldnt find any matching answer. Sorry if I repost same question somewhere in Forum.

I use XP and Octave 3.0.0. When I execute xlabel, ylabel or title (as per below), there is no change happening in Figure 1.0 (java based) window. Why? Where am I doing wrong? Thanks for your time and understanding.

x=linspace(-pi,pi,100);
y=sin(x);
plot(x,y);
xlabel('x value');
ylabel('sinx value');

Regards
Hakan

solid drawing

2008-04-01T08:17:29Z

Hallo!
i am not very exper. with octave!

i want to plot a set of data
x = [1,2,3,4,5,...]
y = [1,2,3,4,5]

when i type: plot (x,y,'Linewidth',1,'r-'); nothing happens: it does not draw the solid line; if i change the r- to r* it draws the stars...

what is wrong here?

THX!
octave 3 with gnuplot on ubuntu

graphics 'n movie

2008-01-24T05:47:36Z

Hello everyone.
I wanted to implement an octave software that behaves in a manner similar to the chart given by windows media player when dell'ascolta a song.
The procedure is to charge the song through wavread octave, then the values found should make the Fourier transform and printing on the screen. An 'the idea but I do not know write commands and move forward, it is not that you could help me?

Re: GUI Frontend options

2008-01-22T08:10:20Z

I am crossposting this on using a browser. It's 3 hours of work.

I'm working on a very limited and different approach to a GUI. Octave is a STDIN and STDOUT focused product. I'd like a functionalized library using browser based java scripting as an alternative. (It's crude in this form, but workable).
I've needed to use a browser as a front end to html GUIs in Octave with Stdin and Stdout. Both IE (4+) in windows and Firefox support console output. This is based on Gunter Born's wscript page. It stops octave in the process. I still support your scheme, but there is some browser based interaction that would add a lot to Octave.

I'm still working the firefox stuff and linux. The code in form1.html shown below should have a window.close(); to return and close the browser.

Yes, it's still very crude, but it offers some simple opportunities for easy development of GUI's with forms and browsers.

The below example should work...
In windows octave, a simple line like the following executes a cscript.
[Status,Output] = System("cscript octave2.js");

The cscript returns the wscript.echo entries from the cscript batch file.

octave2.js

//************************************************
// File: Form1.js (WSH sample in JScript)
// Author: (c) G. Born modified for octave
//
// Using Internet Explorer 4 or 5 to retrieve
// form input
//************************************************
var Text2 = "You entered:\n";

// Launch Internet Explorer, and connect event handler.
var oIE = WScript.CreateObject("InternetExplorer.Application", "IE_");

oIE.Left = 50; // Window position and other properties
oIE.Top = 100;
oIE.Height = 100;
oIE.Width = 280;
oIE.MenuBar = 0; // No menu
oIE.ToolBar = 0;
oIE.StatusBar = 0;
// Commented out because it causes a corrupted window border.
// oIE.Resizable = 0 // Disable resizing.
oIE.navigate(GetPath() + "Form1.htm"); // Load form.
oIE.Visible = 1; // Keep visible.

// Important: Wait until IE is ready.
while (oIE.Busy) {WScript.Sleep(200)} // Suspend

var ready = false; // Form is still open.

// Wait until the user closes the form using
// the Close button in the upper right corner of the window.
// This sets ready to true in the onclose event.
while (!ready) {WScript.Sleep(500)} // Suspend

// Display the data obtained in the event handling procedure.
WScript.Echo(Text2 + "\n" + name + "\n" + age);

// We're ready now. The sample script terminates.
// Here you can add script-specific code.

// Event handler and helper

function IE_OnQuit()
{
// Event handler is called if IE terminates.
// This happens if the user clicks the Close button.
// Retrieve the values.
name = "Name: " + oIE.Document.ValidForm.fName.value;
age = "Age: " + oIE.Document.ValidForm.fAge.value;
ready = true; // Indicate form is closed.
}

function GetPath()
{
// Get script path because form (HTML file)
// must be in the same folder.
var path = WScript.ScriptFullName;
path = path.substr(0, path.lastIndexOf("\\") + 1);
return path;
}

//*** End

and the form form1.htm which returns to the script on the browser close. (Needs a javascript function so use the X to close the window.

<HTML>
<form name="ValidForm">
<p>
Name:
<input type="text" size="5" name="fName">
Age:
<input type="text" size="3" name="fAge">
<br>

Password:
<input type="password" size="12" maxlength="8" name="fPassw">

<input type="button" name="Button1" value="OK">
<br>

<input type="checkbox" name="fPrinter" value="1" checked>
Printer
<input type="checkbox" name="fScreen" value="2">
Screen
<br>

Remarks:
<br>

<textarea cols="40" rows="5" name="fRemark">
</textarea>
</p>
</form>
</HTML>

The output variable will contain everything from the echoed commands.

gri6507 wrote:

Hello,

Please pardon mme for posting this question since it seems like it's been asked many times before. However, I am quite confised about which options are still valid for a GUI frontend to Octave.

What I'd like to have is something like Octave Workshop (http://www.math.mcgill.ca/loisel/octave-workshop/). However, as that page says, the project is no longer being maintained. There also seems to be something at https://sourceforge.net/projects/octave-gtk/, but the screenshots there are not very good and it seems like activity has stopped on that project as well. I also saw a number o references to Tcl, JAVA, and Python programs that are in various states of maintenance and functionality. In summary, I'm confused.

Can someone please calrify this issue for me?

Re: GUI Frontend options Octave & Matlab

2008-01-09T13:33:55Z

Indeed,
Any information on using GUIs with Octave would be welcome. I am trying to run a GUI programed for Matlab and I cannot get results.
Thanks,
Dave

gri6507 wrote:

Hello,

Please pardon mme for posting this question since it seems like it's been asked many times before. However, I am quite confised about which options are still valid for a GUI frontend to Octave.

What I'd like to have is something like Octave Workshop (http://www.math.mcgill.ca/loisel/octave-workshop/). However, as that page says, the project is no longer being maintained. There also seems to be something at https://sourceforge.net/projects/octave-gtk/, but the screenshots there are not very good and it seems like activity has stopped on that project as well. I also saw a number o references to Tcl, JAVA, and Python programs that are in various states of maintenance and functionality. In summary, I'm confused.

Can someone please calrify this issue for me?

GUI Frontend options

2007-11-11T10:11:39Z

Hello,

Please pardon mme for posting this question since it seems like it's been asked many times before. However, I am quite confised about which options are still valid for a GUI frontend to Octave.

What I'd like to have is something like Octave Workshop (http://www.math.mcgill.ca/loisel/octave-workshop/). However, as that page says, the project is no longer being maintained. There also seems to be something at https://sourceforge.net/projects/octave-gtk/, but the screenshots there are not very good and it seems like activity has stopped on that project as well. I also saw a number o references to Tcl, JAVA, and Python programs that are in various states of maintenance and functionality. In summary, I'm confused.

Can someone please calrify this issue for me?

GUI Frontend options

2007-11-11T10:11:39Z

Re: Axes object in Octave 2.9.12 and other plotting questions

2007-06-12T14:04:56Z

Mark B. wrote:

> Hello,
>
> I have a script in Matlab (v 7) that plots a graph with two series and
> that assigns "tick labels" to axis X. It is something like this (for
> only one series):
>
> %%%%%%%%%%%%%%%
> figure1 = figure;
>
> axes1 = axes('Parent',figure1,...
> 'xticklabel',
> {'02/13';'02/14';'02/15';'02/16';'02/17';'02/18';'02/19';'02/20';'02/21';'02/22'},...
> 'xtick',[0 24 48 72 96 120 144 168 192 216],...
> 'position',[0.13 0.11 0.7943 0.815]);
> box('on');
> hold all
>
> plot1 = plot(X1,YMatrix1);
>
> set(plot1,'DisplayName','The name');
> set(plot1,'Color',[0 0 1]);
>
> legend1 = legend(axes1,'show');
> set(legend1,'Location','NorthWest');
>
> %%%%%%%%%%%%%%%
>
> There are some problem with this script in Octave:
>
> 1) hold all. Runs normally in Matlab but Gives an error in Octave.
> Commenting that line makes the error go away but no tick labels are
> displayed either in Matlab or Octave
>
> 2) warning: set: invalid property `DisplayName' in Octave
>
> 3) error: legend: expecting argument to be a character string
>
> My questions are:
>
> - How can I assign tick labels to axis X that works in Octave (and
> also if possible to be compatible with Matlab)
>
> - How can I set the DisplayName of the series that I am plotting?
>
> - How can I assign a legend to an axes object and set its position and
> text?

Mark,

Graphics code is in a transitional period and there are some limitations at the
moment. Some of the syntax you used simply isn't supported. (Type "type
legend" to see.) This should not be difficult to update, and if you'd like to
offer to do so, please do.

If you are using gnuplot as the underlying graphics for Octave, there is support
for any key position you can wish to have (interior corners, exterior corners,
manual placement):

http://gnuplot.sourceforge.net/demo_4.3/key.html

There may need to be some alteration to __go_draw_axes__ if the following
positions don't quite cover everything.

case -1
pos = "right bottom";
inout = "outside";
case 1
pos = "right top";
case 2
pos = "left top";
case 3
pos = "left bottom";
case 4
pos = "right bottom";
otherwise

There is an inherent limitation currently in gnuplot to do only a single key.
If multiple legends is what you want, that would be a feature request to gnuplot.

Regards,

Dan
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Axes object in Octave 2.9.12 and other plotting questions

2007-06-12T13:47:19Z

This list was set up for the discussion of future graphics and GUI
tools in Octave, but is now nearly dead. For questions about how to
use the current graphics features in Octave, please use the help list
since there are many more subscribers there who might be able to
answer your questions.

Not all of Matlab's handle graphics features are supported in Octave.
If you'd like to help improve that situation, then please join the
maintainers mailing list and contribute some code.

jwe

On 12-Jun-2007, Mark B. wrote:

|
| Hello,
|
| I have a script in Matlab (v 7) that plots a graph with two series and
| that assigns "tick labels" to axis X. It is something like this (for
| only one series):
|
| %%%%%%%%%%%%%%%
| figure1 = figure;
ppp|
| axes1 = axes('Parent',figure1,...
| 'xticklabel',
| {'02/13';'02/14';'02/15';'02/16';'02/17';'02/18';'02/19';'02/20';'02/21';'02/22'},...
| 'xtick',[0 24 48 72 96 120 144 168 192 216],...
| 'position',[0.13 0.11 0.7943 0.815]);
| box('on');
| hold all
|
| plot1 = plot(X1,YMatrix1);
|
| set(plot1,'DisplayName','The name');
| set(plot1,'Color',[0 0 1]);
|
| legend1 = legend(axes1,'show');
| set(legend1,'Location','NorthWest');
|
| %%%%%%%%%%%%%%%
|
| There are some problem with this script in Octave:
|
| 1) hold all. Runs normally in Matlab but Gives an error in Octave.
| Commenting that line makes the error go away but no tick labels are
| displayed either in Matlab or Octave
|
| 2) warning: set: invalid property `DisplayName' in Octave
|
| 3) error: legend: expecting argument to be a character string
|
| My questions are:
|
| - How can I assign tick labels to axis X that works in Octave (and
| also if possible to be compatible with Matlab)
|
| - How can I set the DisplayName of the series that I am plotting?
|
| - How can I assign a legend to an axes object and set its position and
| text?
|
| Thanks!
|
| --
| View this message in context: http://www.nabble.com/Axes-object-in-Octave-2.9.12-and-other-plotting-questions-tf3909588.html#a11085343
| Sent from the Octave - Graphics mailing list archive at Nabble.com.
|
| _______________________________________________
| Octave-graphics mailing list
| Octave-graphics@...
| https://www.cae.wisc.edu/mailman/listinfo/octave-graphics
_______________________________________________
Octave-graphics mailing list
Octave-graphics@...
https://www.cae.wisc.edu/mailman/listinfo/octave-graphics

Axes object in Octave 2.9.12 and other plotting questions

2007-06-12T13:33:58Z

Hello,

I have a script in Matlab (v 7) that plots a graph with two series and
that assigns "tick labels" to axis X. It is something like this (for
only one series):

%%%%%%%%%%%%%%%
figure1 = figure;

axes1 = axes('Parent',figure1,...
'xticklabel',
{'02/13';'02/14';'02/15';'02/16';'02/17';'02/18';'02/19';'02/20';'02/21';'02/22'},...
'xtick',[0 24 48 72 96 120 144 168 192 216],...
'position',[0.13 0.11 0.7943 0.815]);
box('on');
hold all

plot1 = plot(X1,YMatrix1);

set(plot1,'DisplayName','The name');
set(plot1,'Color',[0 0 1]);

legend1 = legend(axes1,'show');
set(legend1,'Location','NorthWest');

%%%%%%%%%%%%%%%

There are some problem with this script in Octave:

1) hold all. Runs normally in Matlab but Gives an error in Octave.
Commenting that line makes the error go away but no tick labels are
displayed either in Matlab or Octave

2) warning: set: invalid property `DisplayName' in Octave

3) error: legend: expecting argument to be a character string

My questions are:

- How can I assign tick labels to axis X that works in Octave (and
also if possible to be compatible with Matlab)

- How can I set the DisplayName of the series that I am plotting?

- How can I assign a legend to an axes object and set its position and
text?

Thanks!