Newbie y-axis range question

[Joost Kraaijeveld]

Hi,

I want the y-axis range to have the range of the data in the fourth
column for a plot of the first column on the x-axis and the fourth
column on the y-asis.

And example of the data:

0.01 150 7.0 4.666666666666667
0.05 150 5.0 3.3333333333333335
0.1 150 11.0 7.333333333333333
0.2 150 18.0 12.0

But whatever I try I always get the y-range to be [0:
max-of-the-second-column]. Apparently GnuPlot takes the second column as
y-axis. Is it possible to make GnuPlot take the fourth column as the
range for the y-axes?

TIA

--
Groeten,

Joost Kraaijeveld
Askesis B.V.
Molukkenstraat 14
6524NB Nijmegen
tel: [phone]
fax: [phone]
web: www.askesis.nl



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[Thomas Sefzick]

plot 'datafilename' using 1:4

see:
http://www.gnuplot.info/docs/node100.html
http://www.gnuplot.info/docs/node101.html
http://www.gnuplot.info/docs/node133.html

you should read one of the tutorials
http://www.gnuplot.info/help.html
or have a look at p.k.janerts book (the 2nd
chapter, explaining exactly what you need, can
be downloaded freely)

Joost Kraaijeveld wrote:

Hi,

I want the y-axis range to have the range of the data in the fourth
column for a plot of the first column on the x-axis and the fourth
column on the y-asis.

And example of the data:

0.01 150 7.0 4.666666666666667
0.05 150 5.0 3.3333333333333335
0.1 150 11.0 7.333333333333333
0.2 150 18.0 12.0

But whatever I try I always get the y-range to be [0:
max-of-the-second-column]. Apparently GnuPlot takes the second column as
y-axis. Is it possible to make GnuPlot take the fourth column as the
range for the y-axes?

TIA

--
Groeten,

Joost Kraaijeveld
Askesis B.V.
Molukkenstraat 14
6524NB Nijmegen
tel: [phone]
fax: [phone]
web: www.askesis.nl



------------------------------------------------------------------------------
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is the only developer event you need to attend this year. Jumpstart your
developing skills, take BlackBerry mobile applications to market and stay
ahead of the curve. Join us from November 9 - 12, 2009. Register now!
http://p.sf.net/sfu/devconference
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[Joost Kraaijeveld]

Hi Thomas,

Thanks for the response.

On Thu, 2009-10-15 at 02:36 -0700, Thomas Sefzick wrote:
> plot 'datafilename' using 1:4

I have tried (even before your anser):

plot  'data.plt' using 1:4, '' u 2:xtic(1), '' u 4 title 'error%' with lines

where data.plt is the filename in the current directory

But that does not do what I expected. It generated the picture you can see here:

http://trac.askesis.nl/downloads/iris_with_shuffle_error.jpg

Based on the file you can see here:

iris_with_shuffle_error.plt

TIA

--
Groeten,

Joost Kraaijeveld
Askesis B.V.
Molukkenstraat 14
6524NB Nijmegen
tel: [phone]
fax: [phone]
web: www.askesis.nl


------------------------------------------------------------------------------
Come build with us! The BlackBerry(R) Developer Conference in SF, CA
is the only developer event you need to attend this year. Jumpstart your
developing skills, take BlackBerry mobile applications to market and stay
ahead of the curve. Join us from November 9 - 12, 2009. Register now!
http://p.sf.net/sfu/devconference
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[Thomas Sefzick]

you get exactly what you request:

plot 'data.plt' using 1:4, '' u 2:xtic(1), '' u 4 title 'error%' with lines

in detail:
> plot 'data.plt' using 1:4
uses column '1' for x and column '4' for 'y'
your x-values are in the range [0:1]

> '' u 2:xtic(1)
uses the datafile-linenumber for 'x', column '2' for 'y', and column '1' for xtics labels.
now your x-range is [0:11] because you have 12 datalines, the xtic labels are
re-named '0.05' to '1.0' (taken from column '1'). the y-values are all '150' (taken
from column '2')

> '' u 4 title 'error%' with lines
uses the datafile-linenumber for 'x', column '4' for 'y'
here you plot the data like in the 1st plot but stretched because the datafile
linenumbers range from '0' to '11'

Joost Kraaijeveld wrote:

Hi Thomas,

Thanks for the response.

On Thu, 2009-10-15 at 02:36 -0700, Thomas Sefzick wrote:
> plot 'datafilename' using 1:4

I have tried (even before your anser):

plot  'data.plt' using 1:4, '' u 2:xtic(1), '' u 4 title 'error%' with lines

where data.plt is the filename in the current directory

But that does not do what I expected. It generated the picture you can see here:

http://trac.askesis.nl/downloads/iris_with_shuffle_error.jpg

Based on the file you can see here:

iris_with_shuffle_error.plt

TIA

--
Groeten,

Joost Kraaijeveld
Askesis B.V.
Molukkenstraat 14
6524NB Nijmegen
tel: [phone]
fax: [phone]
web: www.askesis.nl


------------------------------------------------------------------------------
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is the only developer event you need to attend this year. Jumpstart your
developing skills, take BlackBerry mobile applications to market and stay
ahead of the curve. Join us from November 9 - 12, 2009. Register now!
http://p.sf.net/sfu/devconference
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