Re: [Matplotlib-users] Re: overriding default color order and linetypes

[Ryan K. <rya...@gm...>]

There is a serious flaw to my approach.  It seems that if plot is
called with an explicit linetype like 'b-', then ax._get_lines.count
is not automatically incremented.

Ryan

On 5/18/06, Ryan Krauss <rya...@gm...> wrote:
> Thanks Jouni.
>
> I can modify the color order using gca() and _getlines.colors, as you
> mentioned.  But if I can't specify the line type in a similar fashion,
> then this approach isn't going to work for me.
>
> The trick with the other approach (with a global counter for how many
> lines are on the plot), is how to reset the counter for each new plot.
>  gca()._get_lines.count seems to handle this problem by counting the
> lines already on the axis.  (I wouldn't have known to poke around
> there if you had got me started.)
>
> So, unless a cleaner approach is suggested by someone else, I am going
> to follow an approach similar to Jouni's suggestion, only using
> gca()._get_lines.count+1 as the index to my global colors and line
> types list so that I am always calling plot (or actually semilogx)
> with explicit linetype specifications (like 'y-','b--',...)
>
> Any better ideas?
>
> Ryan
>
> On 5/18/06, Jouni K Seppanen <jk...@ik...> wrote:
> > "Ryan Krauss" <rya...@gm...> writes:
> >
> > > How do I change the default color order
> >
> > The colors are hardwired in the pylab interface, but you can hack
> > around it:
> >
> >    gca()._get_lines.colors = ['#101050', '#105010', '#501010']
> >    gca()._get_lines.Ncolors = 3
> >    gca()._get_lines.firstColor = '#101050'
> >
> > Support for this might be a useful addition to the pylab interface.
> > Does anyone know how to do this in Matlab?
> >
> > > and how do I set up a similar default linetype order, so that the
> > > first call to plot generates a solid line and the second a dashed
> > > one (for example).
> >
> > I don't think there is support for this in pylab.
> >
> > Of course, if all your plot calls just draw a single line, you can
> > cycle both the color and the line style easily by defining your own
> > function:
> >
> >    my_colors = ['b','g','r']; my_styles = ['-', ':', '--']
> >    my_c = 0; my_s = 0
> >    def plot(x, y):
> >        global my_colors, my_styles, my_c, my_s
> >        pylab.plot(x, y, my_colors[my_c % len(my_colors)]
> >                         + my_styles[my_s % len(my_styles)])
> >        my_c += 1; my_s += 1
> >
> > But if you want the full pylab.plot argument parsing functionality,
> > the easiest thing would probably be to implement this in
> > matplotlib.axis.
> >
> > --
> > Jouni
> >
> >
> >
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