[Gnuplot-py-users] plotting missing points.

[Ajay G. <aja...@gm...>]

Hi All.

I want to plot a series where some of the data points are missing. I have
come to know that gnuplot support 'set datafile missing' command using which
you can specify a missing y value with any character like '?', or '-' in the
datafile input.

How do i do this when using gnuplot.py? If I set one of the elements of the
input array to '?', it gives the following error:

[211 16:22:15] python plotseries.py
Traceback (most recent call last):
  File "plotseries.py", line 212, in ?
    myPlot = Gnuplot.Data(arange(maxDays), myDataPoints, title='my series
data', with="linespoints")
  File "/usr/lib/python2.4/site-packages/Gnuplot/PlotItems.py", line 526, in
Data
    set = utils.float_array(set)
  File "/usr/lib/python2.4/site-packages/Gnuplot/utils.py", line 38, in
float_array
    return Numeric.asarray(m, Numeric.float32)
  File "/usr/lib64/python2.4/site-packages/numpy/oldnumeric/functions.py",
line 87, in asarray
    return mu.array(a, dtype, copy=0)
ValueError: setting an array element with a sequence.

Thanks in anticipation,
Ajay