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

`

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