This works for me. Mind that data is a list of lists, while your y is just a list. Hence gnuplot plotted y as a function of its index, not of x. #!/usr/bin/env python import Gnuplot g = Gnuplot.Gnuplot() x = range(-5,6) data = [] for i in x: y.append(i*i) data.append([i,i*i]) g('set style data linespoint') #g('set xrange[-5:5]') g.plot(data) g.hardcopy("elephant.ps") For some reason Gnuplot.Gnuplot(persist = 1) does not work for me. However, I view my results with gv. For this set chuck~>cat .gv GV.antialias: True GV.watchFile: True GV.watchFileFrequency: 500 GV.version: gv 3.6.5.91 chuck~> Hope this helps Nicky 2009/8/1 Esmail <ebonak@hotmail.com>:

Well .. technically, this

x = range(-5,5)

should really be

x = range(-5,6)

but still doesn't solve the problem ...

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Hi,

Here is a 3D version. ------------------

#!/usr/bin/env python

import Gnuplot

g = Gnuplot.Gnuplot(debug=1) x = range(-3,4) data = []

for i in x:     for j in x:         data.append([i, j, i*i])

I cannot help you right away this time. This is what I know: I checked the demo.py file that comes along with python-gnuplot. There the plotting starts with the z-values, then the x, and then the y values: This is not what you seem to be doing. See the line: g.splot(Gnuplot.GridData(m,x,y, binary=0)) Besides this, I recall from the not the frequently asked questions site of gnuplot that interlacing spaces has some effect on the plotting of data, which effect I forgot. This may also affect your plot. Sorry that I cannot be of further help this time.

for i in data:     print i[0], i[1], i[2]

g('set hidden3d') g('set style data linespoint') g.splot(data)

------------------

the

    g('set style data linespoint')

leads to lines connecting that ought not to. To see what I mean run the above code, and then compare this with plotting the data below straight from gnuplot. It is the same as the program generates during the run, all I have done is inserted blank lines for each block and then saved the file under the name t2data

------------------

gnuplot> set style data linespoint gnuplot> splot './t2data'

------------------

Is there a way to mimic this with the data list? I tried appending '\n' to the data list, but that didn't work. If there is no easy work around I may just write the data to a file (with the blank lines) and then read it in again - probably not the most efficient way to do this, but it'll work :-) ... plus that seems to be going on in the background already anyway.

Thanks, Esmail

--- t2data file ---- -3 -3 9 -3 -2 9 -3 -1 9 -3 0 9 -3 1 9 -3 2 9 -3 3 9

-2 -3 4 -2 -2 4 -2 -1 4 -2 0 4 -2 1 4 -2 2 4 -2 3 4

-1 -3 1 -1 -2 1 -1 -1 1 -1 0 1 -1 1 1 -1 2 1 -1 3 1

0 -3 0 0 -2 0 0 -1 0 0 0 0 0 1 0 0 2 0 0 3 0

1 -3 1 1 -2 1 1 -1 1 1 0 1 1 1 1 1 2 1 1 3 1

2 -3 4 2 -2 4 2 -1 4 2 0 4 2 1 4 2 2 4 2 3 4

3 -3 9 3 -2 9 3 -1 9 3 0 9 3 1 9 3 2 9 3 3 9

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