gnuplot-py-users Mailing List for Gnuplot.py

On Mon, 2005-04-18 at 10:39 +0200, Edurne Dehesa wrote:
>     Gnuplot.plot 'fichero0' with linespoints, 'fichero1' with linespoints
>                           ^
> SyntaxError: invalid syntax

Have a look at the examples, the plot object is not just a
prefix to the usual command line, but you can use it somewhat
that way.  For example

   pobj = Gnuplot.Gnuplot()

   pobj( 'plot "file" with points, "fileb" with lines' )

or, from one of my scripts

    pobj = Gnuplot.Gnuplot()
    pobj.xlabel( xlab )
    pobj.ylabel( ylab )
    pobj( 'set zlabel "' + zlab + '"' )
    pobj( 'set view 70,340,1.10' )
    pobj( 'set grid xtics ytics' )
    pobj( 'set contour' )
    pobj( 'set cntrparam levels 10' )
    pobj( 'set terminal png small transparent' )
    pobj( 'set output "' + fileName + '"' )

    dobj1 = Gnuplot.GridData( d1, x, y,
                              Gnuplot.PlotItems._unset, 
                              title=d1Title, 
                              with="lines" ),

    pobj.splot( dobj1 )

    pobj.reset()

> I would be also pleased if you could help me with another question: can I 
> change names to every point in the axis??

Maybe you could construct a list of the points then use the more
complex form of "set xtics".   See 'help set xtics' in Gnuplot.
If your dates are in seconds, I'm not sure.  See the help for
xdata and timefmt, it should be possible.

Good luck
-- Simon

-- 
Simon Clift                        ssclift at math dot uwaterloo dot ca
Ph.D. Student, Computational Finance
Scientific Computing Group, School of Computer Science
University of Waterloo
Waterloo, Ontario, Canada   N2L 3G1

is there any way to introduce a line with a concrete character while creating 
a file, so that I can plot every piece of file between those characters as an 
individual plot, once above the others?? I mean... I want to save in a file 
several points, of several people. Then I want to compare all those people in 
a graph, so I want to plot each person's respective points in a different 
color and so on.  
Thank you very much if you can help me.

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Hello everyone,

I'm not yet a subscriber to this list, so please send at least a CC of
your answers to me personally.

I have basically the same question as Geoff Low had in his post '
Plotting time formats in gnuplot-py
<http://sourceforge.net/mailarchive/message.php?msg_id=10079214> ' on
2004-11-18 01:45
I used gnuplot.py quite extensively a couple of years ago and I really
loved it, except for the problem that the gnuplot process needed the
'using' keyword when plotting time-series data. As the PlotItems of
that time didn't allow setting the using-keyword I was forced to work
with temporary files which takes away much of the speed and comfort of
having python controlling gnuplot.

Recently I'm again doing more visualization of time-series and I have
tried to utilize gnuplot's rather limited batch-file capabilities
using nested 'call's to achieve my goals. But that still means a lot
of duplication of code, which I would like to avoid.
I have also tried IDL, but I found that gnuplot's defaults make up
much better images and the cusomization is much easier with gnuplot
even though IDL is basically more powerful if you have enough time to
tweak it the way you want (and this is what I don't have, as usual :-) ).

So my question is, if there is any way to trick the gnuplot process
into using python-arrays that contain time-series information without
resorting to temporary files? I would be back to gnuplot and python in
no time :-)

Best regards,



Thomas

- --
_______________________________________________________

Dipl.-Ing Thomas Pfaff, M.Eng.

Dr.-Ing. Karl Ludwig
Beratender Ingenieur
Wasserwirtschaft - Wasserbau
Herrenstr. 14
76133 Karlsruhe

Tel: 0721 / 91251-46
Fax: 0721 / 91251-19

tho...@lu...
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Hello, I have some troubles with Gnuplot. I'm working with python gnuplot.py 
module. I don't know why an error message appears in my screen when trying to 
draw a plot. This is the message:

 Traceback (most recent call last):
  File "<stdin>", line 1, in ?
  File "graficas.py", line 55
    Gnuplot.plot 'fichero0' with linespoints, 'fichero1' with linespoints
                          ^
SyntaxError: invalid syntax

How must the be the name of the file so that I can call it without problems?? 
when I create these files with python I don't give them any extension since 
it seems not to be necessary. 

I would be also pleased if you could help me with another question: can I 
change names to every point in the axis?? I mean... I want to represent dates 
in the Xaxis. To do so I have previously converted those dates to seconds 
with python since I know the file must contain just numbers. But once I have 
created the files I don't want to see the X axis divided into numbers, but 
into dates, so can I change the names of the divisions of the axis? And in 
case it must be divided into many points.... can I make my graph to move 
horizontally with the help of any kind of bar?is there any way to create it?

Thank you very very much for your help!!
Edurne from Spain.