On Tue, Apr 14, 2009 at 8:50 AM, John Hunter <jdh2...@gmail.com> wrote:
> On Tue, Apr 14, 2009 at 8:09 AM, Chaitanya Krishna <icym...@gmail.com>
> wrote:
> > Hello all,
> >
> > Usually when I plot two or more lines, the color of the lines change.
> > Is it possible to change this default behavior so that when I plot two
> > or more lines, the symbols change and not the color.
> >
> > This would be useful if someone is trying to make plots in black and
> > white so that the symbols change instead of line colors.
>
> You can do this with a little manual intervention -- below is a script
> which cycles through all of mpl's line markers.
>
> import numpy as np
> import matplotlib.lines as lines
> import matplotlib.pyplot as plt
>
> markers = list(lines.Line2D.markers.keys())
> markers.sort()
> N = len(markers)
>
> fig = plt.figure()
> ax = fig.add_subplot(111)
> x = np.arange(20)
> for i in range(50):
> marker = markers[i%N]
> print marker
> y = i*x
> ax.plot(x, y, marker=marker, linestyle='', mfc='blue')
>
> plt.show()
>
> You could do a similar trick with linestyles using the
> lines.Line2D.lineStyles and lines.Line2D.drawStyles dictionaries
> (these map the symbols to the internal Line2D function we use to draw
> the symbols). See also
>
>
> http://matplotlib.sourceforge.net/examples/pylab_examples/line_styles.html
Also, you can use itertools.cycle to loop over a set of markers probably a
bit more cleanly than the example:
markers = itertools.cycle(lines.Line2D.markers.keys())
marker = markers.next()
Ryan
--
Ryan May
Graduate Research Assistant
School of Meteorology
University of Oklahoma
Sent from Norman, Oklahoma, United States
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