[Gnuplot-py-users] bug in write_array for 2d case ?

[Andriy G. <av...@ic...>]

It seems that there is a bug in Gnuplot/utils.py write_array for the
case of 2 dimensional array.
I use gnuplot.py 1.7 with python 2.5 on FreeBSD.

        for point in set[1:]:
            f.write(nest_sep + nest_prefix)
            f.write(fmt % tuple(point.tolist()))

I think that write_array is called with array as a parameter, not a
regular list and it seems that slice syntax is not exactly applicable to
arrays in the same way as it is for lists.
It seems that no iterations actually happened and only data for set[0]
was written to a file.

I had to change the quoted code to the following:
        for point in set.tolist()[1:]:
            f.write(nest_sep + nest_prefix)
            f.write(fmt % tuple(point))


The problem was doing stuff like the following:
x = Numeric.arange(10) / 10.
y = Numeric.sin(x)
g = Gnuplot.Gnuplot()
g.plot(Gnuplot.Data(x,y))

Only one point was plotted.

P.S. I think that this link pretty well describes things for python 2.5
and Numeric (array):
http://projects.scipy.org/pipermail/numpy-discussion/2006-November/024428.html

-- 
Andriy Gapon