matplotlib-users Mailing List for matplotlib

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 <
ga...@gl...> 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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Hi Guilherme

On Jul 22, 2013, at  20:54 PM, Guilherme Araújo Martins <ga...@gl...> 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/

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!

On Jul 20, 2013, at 3:04PM, Tommy Grav wrote:

> On Jul 20, 2013, at 11:19 AM, Michiel de Hoon <mjl...@ya...> wrote:
> 
> Ok, so with a long list of print statements I have tracked it down to 
> the statement
> 
> import matplotlib._png as _png
> 
> in image.py. 

Tommy,

Instead of a lot of print statements, you can use
python -v
if you are starting from a python interpreter.

-Sterling

Greetings all,

I have this problem now as well. I use a Mac with Canopy installed and it was working fine until I recently updated my packages and got the new matplotlib. The code which reproduces this error for me is very simple:

{{{
x = scipy.random.normal(0,1,100)

f = figure(num=1)
f.clear()
ax = f.add_subplot(111)
ns,bns,plt0  = ax.hist(x,bins=10,log=True)
plt1 = ax.bar(bns[0:-1],ns,width=bns[1:]-bns[0:-1],color='r',log=True)
draw()
}}}


The code works fine if one comments out the ax.bar usage but fails otherwise. I have tried multiple different kwargs or removing the second "log=True" and all result in the same TypeError.

Regards,
Brian



On Apr 18, 2013, at 12:42 PM, Michael Droettboom <md...@st...> wrote:

> Can you please provide a complete, minimal and self-contained script 
> that reproduces the error?  The example below has many undefined 
> variables etc.
> 
> Cheers,
> Mike
> 
> On 04/16/2013 07:09 PM, Christophe Pettus wrote:
>> # preamble code collecting data
>> 
>>     ind = np.arange(len(table_name))
>> 
>>     width = 0.35
>> 
>>     fig = plot.figure(figsize=DEFAULT_FIGURE_SIZE)
>>     ax = fig.add_subplot(111, axisbg='#fafafa', alpha=0.9)
>> 
>>     ax.set_title('Largest Tables')
>> 
>>     ax.set_xlabel('Size (log scale)')
>> 
>>     ax.set_xscale('log')
>>     ax.grid(True)
>> 
>>     ax.xaxis.set_major_formatter(FuncFormatter(magnitude_ticks))
>> 
>>     dbar = ax.barh(ind, data_size, width, linewidth=0, color='blue', label='Main Data')  # exception here
>>     ibar = ax.barh(ind, index_toast_size, width, left=data_size, linewidth=0, color='red', label='Toast/Indexes')
>>     ax.set_yticks(ind + width/2)
>>     ax.set_yticklabels(table_name, fontproperties=xx_small_font)
>> 
>>     ax.legend(loc='lower right', prop=x_small_font)
>> 
>>     plot.tight_layout()
>> 
>>     plot.savefig(REPORT_DIR_PATH + '/table_sizes.pdf')
>> 
>>     plot.close()
> 
> 
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