gnuplot-py-users

[Gnuplot-py-users] help me with these problems so that I can go on with my work, please!

[Edurne D. <ed...@ke...>]

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.

Re: [Gnuplot-py-users] help me with these problems so that I can go on with my work, please!

[Simon C. <ss...@ma...>]

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