水平条形图:调整y轴标签尺寸

时间:2014-08-05 08:22:27

标签: python matplotlib pandas

使用pandas我试图制作水平条形图,但y轴标签被切断。 对于情节我使用了这个数据..

Term                                                           value
GO:0043232~intracellular non-membrane-bounded organelle    69.40887024
GO:0043228~non-membrane-bounded organelle                  68.41919153
GO:0051384~response to glucocorticoid stimulus              58.50901338
hsa04310:Wnt signaling pathway                             24.56895837
GO:0016055~Wnt receptor signaling pathway                   18.00929324
GO:0042127~regulation of cell proliferation             5.215295969

对于y轴标签,我使用" Term"列。

我的代码是

    a=list(final_table['value'])
    b=list(final_table['Term'])
    data=pd.DataFrame(a,index=b,columns=['value'])
    data[:31].plot(kind='barh',color='k',alpha=0.7)
    matplotlib.pyplot.savefig('test.png')

水平条形图的示例如下所示:plot

我该如何解决?而不是保存图像我还尝试使用pandas和XlsxWriter(pandas and XlsxWriter)在Excel文件中制作和编写绘图,但似乎XlsxWriter没有绘制水平条形图的功能。

1 个答案:

答案 0 :(得分:2)

你可以这样做:

In [1]: data
Out[1]: 
                                                             value
Term                                                              
GO:0043232~intracellular non-membrane-bounded organelle  69.408870
GO:0043228~non-membrane-bounded organelle                68.419192
GO:0051384~response to glucocorticoid stimulus           58.509013
hsa04310:Wnt signaling pathway                           24.568958
GO:0016055~Wnt receptor signaling pathway                18.009293
GO:0042127~regulation of cell proliferation               5.215296


In [2]: data.plot(kind="barh", fontsize=9, figsize=(15,8)) 
In [3]: plt.yticks(range(6), 
                   ["\n".join(
                              [" ".join(i.split("~")[:-1]),
                              "\n".join(i.split("~")[-1].split(" "))])
                   for i in a.index])

barh

在这里你获得了空间:

  • fontsize smaller
  • 更大的数字
  • 将文字拆分为不同的行:

"\n".join([

" ".join(i.split("~")[:-1]), # everything before the "~" () actually [0] but since the 4th line has no "~", I put all but last to avoid redundancy.

"\n".join(i.split("~")[-1].split(" ")) # here line break every word.

])

希望这会有所帮助,如果您有疑问,请不要犹豫。

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