Re: [Matplotlib-users] setting non-basic dashes

John Prince wrote:
> First off, thanks for matplotlib.  It really is amazing.
>
> I can't seem to figure out an acceptable sequence of dashes per the 
> documentation:
> 'dashes: sequence of on/off ink in points'
>
> This is what I'm trying:
>
>
> mydashes = ['- ', '--', '- ', '--', '- ']
>
> lines = plot(*triplets)
>
> for i in range(len(lines)):
>     setp(lines[i], dashes=mydashes[i])
>
>
> I'm getting errors like:
>
> ValueError: invalid literal for float(): -
>
> or a message about even numbers in the dash sequence being required 
> when I don't use even-length strings.
>
> I really need about 5-10 different dash sequences to lines in a 
> publication and the defaults are not quite enough.

Hello John,

I found this in the online documentation of the pylab.plot() function:

The following line styles are supported:
 
    -     : solid line
    --    : dashed line
    -.    : dash-dot line
    :     : dotted line
    .     : points
    ,     : pixels
    o     : circle symbols
    ^     : triangle up symbols
    v     : triangle down symbols
    <     : triangle left symbols
    >     : triangle right symbols
    s     : square symbols
    +     : plus symbols
    x     : cross symbols
    D     : diamond symbols
    d     : thin diamond symbols
    1     : tripod down symbols
    2     : tripod up symbols
    3     : tripod left symbols
    4     : tripod right symbols
    h     : hexagon symbols
    H     : rotated hexagon symbols
    p     : pentagon symbols
    |     : vertical line symbols
    _     : horizontal line symbols
    steps : use gnuplot style 'steps' # kwarg only
 
The following color abbreviations are supported
 
    b  : blue
    g  : green
    r  : red
    c  : cyan
    m  : magenta
    y  : yellow
    k  : black
    w  : white
 
In addition, you can specify colors in many weird and
wonderful ways, including full names 'green', hex strings
'#008000', RGB or RGBA tuples (0,1,0,1) or grayscale
intensities as a string '0.8'.  Of these, the string
specifications can be used in place of a fmt group, but the
tuple forms can be used only as kwargs.
 
Line styles and colors are combined in a single format string, as in
'bo' for blue circles.
 
The **kwargs can be used to set line properties (any property that has
a set_* method).  You can use this to set a line label (for auto
legends), linewidth, anitialising, marker face color, etc.  Here is an
example:
 
    plot 
<http://matplotlib.sourceforge.net/matplotlib.pyplot.html#-plot>([1,2,3], [1,2,3], 'go-', label='line 1', linewidth=2)
    plot 
<http://matplotlib.sourceforge.net/matplotlib.pyplot.html#-plot>([1,2,3], [1,4,9], 'rs',  label='line 2')
    axis 
<http://matplotlib.sourceforge.net/matplotlib.pyplot.html#-axis>([0, 4, 0, 10])
    legend 
<http://matplotlib.sourceforge.net/matplotlib.pyplot.html#-legend>()

HTH,
-- jv

>
> Thanks,
> John
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