Asking for help modifying a matplot windrose graphic using Python (:

Community matplotlib-users
1

Hello guys.

I’m having a problem with a matplot graphic and I guess it can be easy for Python experts to solve. Hope I’m not out of topic here.

Basically, I’m using this code…

http://matplotlib.org/examples/pylab_examples/polar_bar.html

… but I want to turn it in something like this graphic over here…

http://www.weathersa.co.za/web/images/articles/windrose.png

You see, where more than one bar pointing the same direction will be put one over the other (the biggest in the base and the smallest at the top). I assumed I had to put some function at this part of the code:

bars = ax.bar(theta, radii, width=width, bottom=0.0)

Turning Bottom into a function call somewhat related to the radii (bar size) if both bars have the same theta (angle). Point is I’m having some trouble doing that. I’m totally stuck, actually.

If not a complete solution, some tip would be apreciated.

Thank you very much!

2

Hi Guilherme

···

On Jul 22, 2013, at 20:54 PM, Guilherme Araújo Martins <gamigam@…4418…> wrote:

Basically, I’m using this code…

http://matplotlib.org/examples/pylab_examples/polar_bar.html

… but I want to turn it in something like this graphic over here…

http://www.weathersa.co.za/web/images/articles/windrose.png

You see, where more than one bar pointing the same direction will be put one over the other (the biggest in the base and the smallest at the top). I assumed I had to put some function at this part of the code:

bars = ax.bar(theta, radii, width=width, bottom=0.0)

Turning Bottom into a function call somewhat related to the radii (bar size) if both bars have the same theta (angle). Point is I’m having some trouble doing that. I’m totally stuck, actually.

For each direction, just plot the largest one first, and the smallest one last and set_alpha = 1.

Cheers, Jody

–

Jody Klymak

http://web.uvic.ca/~jklymak/

3

Guilherme,

Check out my implementation of windroses here:

https://github.com/phobson/python-metar/blob/master/metar/graphics.py#L138

···

On Mon, Jul 22, 2013 at 11:54 AM, Guilherme Araújo Martins <gamigam@…4017…418…> wrote:

Hello guys.

I’m having a problem with a matplot graphic and I guess it can be easy for Python experts to solve. Hope I’m not out of topic here.

Basically, I’m using this code…

http://matplotlib.org/examples/pylab_examples/polar_bar.html

… but I want to turn it in something like this graphic over here…

http://www.weathersa.co.za/web/images/articles/windrose.png

You see, where more than one bar pointing the same direction will be put one over the other (the biggest in the base and the smallest at the top). I assumed I had to put some function at this part of the code:

bars = ax.bar(theta, radii, width=width, bottom=0.0)

Turning Bottom into a function call somewhat related to the radii (bar size) if both bars have the same theta (angle). Point is I’m having some trouble doing that. I’m totally stuck, actually.

If not a complete solution, some tip would be apreciated.

Thank you very much!

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