Re: [Gnuplot-py-users] Problem working with xtics

[Roberto Rodríguez-R. <ro...@gm...>]

Thank you for your answer, but I got an error I did it:

x1=[1,2,3,4]
y1=[5,6,7,8]
 data = [ Gnuplot.Data(x0 , y0 , title="Nov-09") , Gnuplot.Data(x1 , y1 ,
title="Dec-09") ]
g.plot(*data)

and I got the following error:

gnuplot> plot "/tmp/tmp8RzST6.gnuplot/fifo" title "Nov-09",
"/tmp/tmpLro45i.gnuplot/fifo" title "Dec-09"
                                                          ^
         line 0: Too many columns in using specification

What I need to do is a graphic like this
http://www.ibm.com/developerworks/aix/library/au-gnuplot/diskimage.gif in
these graphic I have the same x for several y.

Best Regards
             Roberto







On Mon, Feb 20, 2012 at 5:26 PM, <e....@nk...> wrote:

> As far as I can tell, this line is wrong
>
> g.plot(data using 2:xtic(1) title "Oct-09 data growth(gb)", ''
> using 3 title "Nov-09 data growth(gb)", '' using 4 title "Dec-09 data
> growth(gb)")
>
> you must create the data like this
>
> data = [ Gnuplot.Data(x0 , y0 , title="Nov-09 etc") ,
>         Gnuplot.Data(x1 , y1 , title="Dec-09 etc") ,
>       ]
>
> where x0,y0 (etc) are the data arrays, then plot it with
>
> g.plot(*data)
>
>
> Edo
>
>
> > -----Original Message-----
> > From: Roberto Rodríguez-Rodríguez [mailto:ro...@gm...]
> > Sent: Monday, February 20, 2012 5:20 PM
> > To: gnu...@li...
> > Subject: [Gnuplot-py-users] Problem working with xtics
> >
> > Hi, I need to do a bar graph with categories, I found these example
> >
> > http://www.ibm.com/developerworks/aix/library/au-gnuplot/index.html
> >
> > I need to do something similar, for many data. I tried to
> > replicate the example on python. I wrote the respective code
> > I append it at the end of the message.
> >
> > but I got these error:
> >   File "./graph.py", line 119
> >     g.plot(data using 2:xtic(1) title "Oct-09 data growth(gb)", ''
> > using 3 title "Nov-09 data growth(gb)", '' using 4 title "Dec-09 data
> > growth(gb)")
> >                     ^
> > SyntaxError: invalid syntax
> >
> > The function fileopen2 is just for parsing the file with the
> > data, I got a matrix wich I tried to graph. The problem is
> > with the plot command, I don't know how to manage categories
> > with gnuplot.py, I have looking in the web in several places
> > but all the examples don't touch these part.
> >
> > these is my code
> >
> > #! /usr/bin/env python
> >
> > import Gnuplot, Gnuplot.funcutils, sys
> > import sys
> > import re
> > import math
> >
> > #*************************************************************
> > ******************
> > def plot2D(data):
> >         print sys.maxint
> >         g = Gnuplot.Gnuplot() #persist=1)
> >         g.title('Memory writes')
> >         g('set terminal png truecolor')
> >         g('set grid')
> >         g('set style data histograms') # give gnuplot an
> > arbitrary command
> >         g('set style fill solid 1.00 border -1')
> >         g('set xlabel "page_number"')
> >         g('set ylabel "number of writes"')
> >         g('set autoscale')
> >         g.plot(data using 2:xtic(1) title "Oct-09 data growth(gb)", ''
> > using 3 title "Nov-09 data growth(gb)", '' using 4 title "Dec-09 data
> > growth(gb)")
> >         g.hardcopy("blah.png",terminal="png")
> >         raw_input('Press enter to continue...\n')
> > #*************************************************************
> > ******************
> >
> > #*************************************************************
> > ******************
> > def file_open2(DataFile):
> > #Open the file
> > #       print "open"
> >         try:
> >                 data_file = open(DataFile, "r") #open the file
> >                 data_points=data_file.read() #save the file in a list
> >                 line_points=data_points.split('\n') #split
> > the file by new lines
> >                 data_file.close()
> >         except IOError, e:
> >                 print >> sys.stderr, "File Open Error:", e
> >                 sys.exit(2)
> >
> >         reg_exp=re.compile(r"\s+") #reg_exp for separate each
> > token in the list
> >         mem=[[]]
> >         print "Putting data in an array"
> >         for i in range(len(line_points)-1):
> >                 mem_line=reg_exp.split(line_points[i])
> >                 for j in range(len(mem_line)):
> >                         if j==0:
> >                                 mem[i].append((mem_line[j]))
> >                         else:
> >                                 mem[i].append(float(mem_line[j]))
> >                 mem.append([])
> >         mem.pop()
> >         return mem
> > #*************************************************************
> > ******************
> >
> > if __name__ == '__main__':
> >         plot2D(file_open2(sys.argv[1]))
> >
> >
> > the file that have the data contains:
> >
> > hdisk2 420 425 410
> > hdisk3 700 780 760
> > hdisk4 450 450 452
> > hdisk5 680 702 690
> > hdisk6 320 330 329
> > hdisk7 530 515 514
> >
> > I really appreciate any help. Thank you
> >
> > --
> > Best Regards
> >              Roberto
> >
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