Win7，64位下Python 读取csv文件(Excel转化的)并绘制图表

参考代码：

http://matplotlib.org/examples/pylab_examples/loadrec.html

依赖的包：
1.matplot
2.numpy

Python 读取csv文件(Excel转化的)并绘制图表。

代码如下：

from __future__ import print_function
from matplotlib import mlab
import matplotlib.pyplot as plt
import matplotlib.cbook as cbook

datafile = cbook.get_sample_data('d:\\FileTest\\Barometer.csv', asfileobj=False)
print('loading', datafile)
a = mlab.csv2rec(datafile)
#a.sort()
print(a.dtype)

fig = plt.figure()
ax = fig.add_subplot(111)
ax.plot(a.pressure, '-')
fig.autofmt_xdate()

# if you have xlwt installed, you can output excel
try:
    import mpl_toolkits.exceltools as exceltools
    exceltools.rec2excel(a, 'test.xls')
except ImportError:
    pass
plt.title('Barometer') 
plt.ylabel('Pa')  
plt.show()

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