Re: [Matplotlib-users] barchart: center xticklabels for only one data set

http://matplotlib.sourceforge.net/api/pyplot_api.html#matplotlib.pyplot.bar

use

ax.set_xticks(ind+width*.5)

instead of

ax.set_xticks(ind+width)

-JJ






On Thu, Mar 5, 2009 at 1:40 PM, Timmie <tim...@gm...> wrote:
> Hello,
> I tried to modify the bar chart demo for my case.
> I want to plot only bar charts for one data set.
>
> But the xticklables are not centered below the bars, rather are they left in
> place as if there were still two data sets.
>
> How do I modify  set_xticklabels in oder to get the lables centered below the bar
> one data set?
>
> Thanks in advance,
> Timmie
>
>
> #### modified bar charts demo
>
>
> #!/usr/bin/env python
> # a bar plot with errorbars
> import numpy as np
> import matplotlib.pyplot as plt
>
> N = 5
> menMeans = (20, 35, 30, 35, 27)
> menStd =   (2, 3, 4, 1, 2)
>
> ind = np.arange(N)  # the x locations for the groups
> width = 0.35       # the width of the bars
>
> fig = plt.figure()
> ax = fig.add_subplot(111)
> rects1 = ax.bar(ind, menMeans, width, color='r', yerr=menStd)
>
> womenMeans = (25, 32, 34, 20, 25)
> womenStd =   (3, 5, 2, 3, 3)
> #~ rects2 = ax.bar(ind+width, womenMeans, width, color='y', yerr=womenStd)
>
> # add some
> ax.set_ylabel('Scores')
> ax.set_title('Scores by group and gender')
> ax.set_xticks(ind+width)
> ax.set_xticklabels( ('G1', 'G2', 'G3', 'G4', 'G5'), multialignment='left',
> position=(-2,0) )
>
> #~ ax.legend( (rects1[0], rects2[0]), ('Men', 'Women') )
>
> def autolabel(rects):
>    # attach some text labels
>    for rect in rects:
>        #~ print rect
>        height = rect.get_height()
>        print height
>        ax.text(rect.get_x()+rect.get_width()/2., 1.05*height, '%d'%int(height),
>                ha='center', va='bottom')
>
>
> autolabel(rects1)
> #~ autolabel(rects2)
>
> plt.show()
>
>
>
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