Matplotlib是一个Python的图形框架,类似于MATLAB和R语言。
Matplotlib的官网地址是 http://matplotlib.org/ ,下载地址为 http://matplotlib.org/downloads.html,选择对应的版本即可安装,我选择的版本为 matplotlib-1.3.1.win32-py2.7.exe。
由于我之前已经安装过NumPy1.8,所以安装Matplotlib后只需要安装 dateutil 和 pyparsing,win32的安装文件可以在这里找到 http://www.lfd.uci.edu/~gohlke/pythonlibs/。
所有配套组件都安装成功后如果执行 import matplotlib.pyplot as plt 出错,请参考这篇文章 http://blog.youkuaiyun.com/yang6464158/article/details/18546871#comments安装 scipy ,然后把C:\Python27\Lib\site-packages\scipy\lib中的six.py six.pyc six.pyo三个文件拷贝到C:\Python27\Lib\site-packages目录下。
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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, ax
=
plt.subplots()
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'
) )
ax.legend( (rects1[
0 ], rects2[ 0 ]), ( 'Men' , 'Women'
) )
def
autolabel(rects):
# attach some text labels
for rect in
rects:
height =
rect.get_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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