# MatPlotLib question: How to get more different size plot symbols ?

Discussion in 'Python' started by John Hunter, Oct 19, 2004.

1. ### John HunterGuest

Re: MatPlotLib question: How to get more different size plotsymbols ?

>>>>> "Colombes" == Colombes <> writes:

Colombes> MatPlotLib question: How to get more different size plot
Colombes> symbols in the plot function ?

Colombes> Is there a way to get different size squares (or circles
Colombes> or triangles, etc.) ?

Colombes> For example, in a two dimensional plot of heights and
Colombes> weights of individuals, is there a way to represent also
Colombes> the age of the individual by the size of the plot symbol
Colombes> ?

Yes, you will want to use the scatter function for this. With "plot",
you can change the size of the symbols with the markersize keyword
argument, but all of the markers must be the same size. With scatter,
the individual marker size (and colors) can vary.

See

example code: http://matplotlib.sf.net/examples/scatter_demo.py

screenshot: http://matplotlib.sourceforge.net/screenshots.html#scatter_demo2

scatter help: http://matplotlib.sourceforge.net/matplotlib.matlab.html#-scatter

scatter support the following marker shapes (currently all regular
polygons)

's' : square
'o' : circle
'^' : triangle up
'>' : triangle right
'v' : triangle down
'<' : triangle left
'd' : diamond
'p' : pentagram
'h' : hexagon
'8' : octagon

Hope this helps,
JDH

John Hunter, Oct 19, 2004

2. ### Dr. ColombesGuest

MatPlotLib question: How to get more different size plot symbols in
the plot function ?

Is there a way to get different size squares (or circles or triangles,
etc.) ?

For example, in a two dimensional plot of heights and weights of
individuals, is there a way to represent also the age of the
individual by the size of the plot symbol ?

Thanks for your help.

Dr. Colombes, Oct 19, 2004

3. ### Dr. ColombesGuest

Re: MatPlotLib question: How to get more different size plot symbols ?

Thanks, John.

Nothing like getting the info straight from the source.

John Hunter <> wrote in message news:<>...
> >>>>> "Colombes" == Colombes <> writes:

>
> Colombes> MatPlotLib question: How to get more different size plot
> Colombes> symbols in the plot function ?
>
> Colombes> Is there a way to get different size squares (or circles
> Colombes> or triangles, etc.) ?
>
> Colombes> For example, in a two dimensional plot of heights and
> Colombes> weights of individuals, is there a way to represent also
> Colombes> the age of the individual by the size of the plot symbol
> Colombes> ?
>
> Yes, you will want to use the scatter function for this. With "plot",
> you can change the size of the symbols with the markersize keyword
> argument, but all of the markers must be the same size. With scatter,
> the individual marker size (and colors) can vary.
>
> See
>
> example code: http://matplotlib.sf.net/examples/scatter_demo.py
>
> screenshot: http://matplotlib.sourceforge.net/screenshots.html#scatter_demo2
>
> scatter help: http://matplotlib.sourceforge.net/matplotlib.matlab.html#-scatter
>
> scatter support the following marker shapes (currently all regular
> polygons)
>
> 's' : square
> 'o' : circle
> '^' : triangle up
> '>' : triangle right
> 'v' : triangle down
> '<' : triangle left
> 'd' : diamond
> 'p' : pentagram
> 'h' : hexagon
> '8' : octagon
>
> Hope this helps,
> JDH

Dr. Colombes, Oct 20, 2004