matplotlib xtick labels not aligned

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Use align="center" in your bar plot, by default they line up on the edges. Here is a minimal working example:

import pylab as plt

X = [1,2,3,4]
Y = [1,4,3,2]

fig, axes = plt.subplots(2, 1)
ax1, ax2 = axes

ax1.bar(X,Y,alpha=.5)
ax1.set_xticks(X)

ax2.bar(X,Y,align="center",alpha=.5)
ax2.set_xticks(X)           

plt.show()

enter image description here

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As3adTintin
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As3adTintin

I work as an Education Data Analyst

Updated on June 04, 2022

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  • As3adTintin
    As3adTintin over 1 year

    I created a pretty simple stacked bar chart, but for some reason my x-tick labels are off centered. I tried using some tick.label.set_ properties to line them up be to no avail. Any suggestions? Thanks!

    Code:

    bottom = np.vstack((np.zeros((data.shape[1],), dtype=data.dtype), np.cumsum(data, axis=0) [:-1]))
    for dat, col, bot, lab in zip(data, colors, bottom, labels):
        ax1.bar(ind, dat, color=col, bottom = bot, alpha = .7, label = lab)
    
    xticks([z for z in range(0,len(income_brackets))],[(str("{0:.0f}".format(k/1000)) + '-' + str("{0:.0f}".format(l/1000))) for k,l in income_brackets])
    for tick in ax1.xaxis.get_major_ticks():
        tick.label.set_fontsize(12)
        tick.label.set_horizontalalignment('left')
    

    Image:

    enter image description here