Hi there,
say, I have x and y data like this (the real data I am working with is
from numerical simulations, though):
from numpy import arange, sin
x = arange( 0., 1., 0.001 )
y = sin( 50*x )
Now, a line plot would not look very decent because of the 1000
overlapping markers:
plot(x, y, '-ro')
Now, I'd rather have the same plot with a marker symbol only every 20th
data point. Of course, I can easily achieve this by slicing through my
data set and making two plots, one for the line and another one for the
markers:
line = plot(x, y, '-r')
markers = plot(x[::20], y[::20], 'ro')
Note that just doing a plot(x[::20],y[::20],'-ro') would 'distort' the
plot because the markers are being linked by straight lines.
What fails me is how to make a legend with the appropriate 'combined'
line style '-ro'? I have tried to supply the legend statement with that
linestyle:
legend( ['-ro'], ['data'] )
but it really expects a list of line instances, so that did not work.
Thanks for your suggestions,
Maddox
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