Line and Marker Properties Corrupt

[Peter Berntsen]

I don't know if it is gnuplot or octave to blame but

t = 0:0.1:6.3;
line(t,sin(t),'linestyle','-')
Gives the same result as linestyle changed to:
     Dashed lines.
"--"
     Points.
":"
     A dash-dot line.
"-."
That is the line style is solid no matter what I specify.
Linewidth works.

 plot(t,sin(t),".","markersize",3)
 plot(t,sin(t),"+","markersize",3)
 plot(t,sin(t),"*","markersize",3)
 plot(t,sin(t),"o","markersize",3)
 plot(t,sin(t),"x","markersize",3)
 
Gives the same results as octave:
plot(t,sin(t),".")

I run gnuplot
        G N U P L O T
        Version 4.2 patchlevel 3
        last modified Mar 2008
        System: Linux 2.6.27-7-generic

and octave:
GNU Octave, version 3.0.1

[John W. Eaton-3]

On 26-Nov-2008, Peter Berntsen wrote:

|
| I don't know if it is gnuplot or octave to blame but
|
| t = 0:0.1:6.3;
| line(t,sin(t),'linestyle','-')
| Gives the same result as linestyle changed to:
|      Dashed lines.
| "--"
|      Points.
| ":"
|      A dash-dot line.
| "-."
| That is the line style is solid no matter what I specify.
| Linewidth works.
|
|  plot(t,sin(t),".","markersize",3)
|  plot(t,sin(t),"+","markersize",3)
|  plot(t,sin(t),"*","markersize",3)
|  plot(t,sin(t),"o","markersize",3)
|  plot(t,sin(t),"x","markersize",3)
|  
| Gives the same results as octave:
| plot(t,sin(t),".")
|
| I run gnuplot
| G N U P L O T
| Version 4.2 patchlevel 3
| last modified Mar 2008
| System: Linux 2.6.27-7-generic
|
| and octave:
| GNU Octave, version 3.0.1

I think the problem is that gnuplot does not provide
terminal-independent control over line styles.

jwe
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[Petr Mikulik]

> | t = 0:0.1:6.3;
> | line(t,sin(t),'linestyle','-')
> | Gives the same result as linestyle changed to:
> |      Dashed lines.
> | "--"
> |      Points.
> | ":"
> |      A dash-dot line.
> | "-."
> | That is the line style is solid no matter what I specify.
> | Linewidth works.

Dotted and dashed lines are either not available or not unitified across
gnuplot terminals.

A "dashtype" option has been mentioned in
http://sourceforge.net/tracker/index.php?func=detail&aid=2004590&group_id=2055&atid=302055

however solid/dash/dotted control has not been contributed. A patch would be
very welcome.


> |  plot(t,sin(t),".","markersize",3)
> |  plot(t,sin(t),"+","markersize",3)
> |  plot(t,sin(t),"*","markersize",3)
> |  plot(t,sin(t),"o","markersize",3)
> |  plot(t,sin(t),"x","markersize",3)
> |  
> | Gives the same results as octave:
> | plot(t,sin(t),".")

This is a bug in octave. Try command
        test
in gnuplot. The first 13 point symbols are unified across many terminals
(x11, wxt, png, ps, pdf, ...).


> I think the problem is that gnuplot does not provide
> terminal-independent control over line styles.

Yes, it does except for the control of dashes. See
        set style line ...


---
PM
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[John W. Eaton-3]

On  8-Dec-2008, Petr Mikulik wrote:

| > | t = 0:0.1:6.3;
| > | line(t,sin(t),'linestyle','-')
| > | Gives the same result as linestyle changed to:
| > |      Dashed lines.
| > | "--"
| > |      Points.
| > | ":"
| > |      A dash-dot line.
| > | "-."
| > | That is the line style is solid no matter what I specify.
| > | Linewidth works.
|
| Dotted and dashed lines are either not available or not unitified across
| gnuplot terminals.
|
| A "dashtype" option has been mentioned in
| http://sourceforge.net/tracker/index.php?func=detail&aid=2004590&group_id=2055&atid=302055
|
| however solid/dash/dotted control has not been contributed. A patch would be
| very welcome.
|
|
| > |  plot(t,sin(t),".","markersize",3)
| > |  plot(t,sin(t),"+","markersize",3)
| > |  plot(t,sin(t),"*","markersize",3)
| > |  plot(t,sin(t),"o","markersize",3)
| > |  plot(t,sin(t),"x","markersize",3)
| > |  
| > | Gives the same results as octave:
| > | plot(t,sin(t),".")
|
| This is a bug in octave. Try command
| test
| in gnuplot. The first 13 point symbols are unified across many terminals
| (x11, wxt, png, ps, pdf, ...).

I checked in the following change.

Thanks,

jwe


# HG changeset patch
# User John W. Eaton <jwe@...>
# Date 1231916820 18000
# Node ID 738cb6271933f66e816114182784790c1c2db8c8
# Parent  841f8e3370c6b98f819681c1662f4844128c0f35
__go_draw_axes__.m: scale markersize by 1/3 instead of 1/6

diff --git a/scripts/ChangeLog b/scripts/ChangeLog
--- a/scripts/ChangeLog
+++ b/scripts/ChangeLog
@@ -1,4 +1,6 @@
 2009-01-14  John W. Eaton  <jwe@...>
+
+ * plot/__go_draw_axes__.m: Scale markersize by 1/3, not 1/6.
 
  * io/dlmwrite.m: Use '%c' format for character data.
 
diff --git a/scripts/plot/__go_draw_axes__.m b/scripts/plot/__go_draw_axes__.m
--- a/scripts/plot/__go_draw_axes__.m
+++ b/scripts/plot/__go_draw_axes__.m
@@ -589,7 +589,7 @@
      usingclause{data_idx} = sprintf ("record=%d", numel (obj.xdata));
 
      if (isfield (obj, "markersize"))
-       mdat = obj.markersize / 6;
+       mdat = obj.markersize / 3;
      endif
 
              if (isfield (obj, "edgecolor"))
@@ -1303,7 +1303,7 @@
     endif
 
     if (isfield (obj, "markersize"))
-      fprintf (plot_stream, " pointsize %f", obj.markersize / 6);
+      fprintf (plot_stream, " pointsize %f", obj.markersize / 3);
       found_style = true;
     endif
   else

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