http://matplotlib.sourceforge.net/api/pyplot_api.html#matplotlib.pyplot.bar
The second argument is the heights of the bars, not the top coordinate.
JJ
On Sun, Sep 27, 2009 at 11:29 AM, per freem <perfreem@...> wrote:
> hi all,
>
> i am trying to make a simple stacked bar graphs (just two layers) and
> am getting some strange results. i have the following code:
>
> import numpy as np
> import matplotlib.pyplot as plt
> ind = np.arange(3)
> width = 0.35
> plt.bar(ind, [5128307, 4305252, 4817425], width, align='center', color='r')
> plt.bar(ind, [5969352, 5011032, 5590754], width, align='center',
> bottom=[5128307, 4305252, 4817425], color='k')
>
> i want it to be so that the bar graphs with values [5128307, 4305252,
> 4817425] appear in red "below" the taller bar graphs with values
> [5969352, 5011032, 5590754]. when i try to plot this, i get a very
> strange yaxis, formatted on a 1e7 scales, and the values appear
> wrong.
>
> if i modify my plot to simply be:
>
> ind = np.arange(3)
> width = 0.35
> plt.bar(ind, [5969352, 5011032, 5590754], width, align='center', color='k')
>
> then the yaxis appears correctly, with ylim set to 6 million. how can
> i get the graph to look just like this, except have the stacked
> smaller bar graphs appear in red?
>
> any help on this would be greatly appreciated.
>
> thanks.
>
> 
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