画折线图的程序，画折线图程序,#_*_coding:u

画折线图的程序，画折线图程序,#_*_coding:u

#_*_coding:utf8## Need to install matplotlib#import numpy as npimport pylab as plx1 = [1, 2, 3, 4, 5, 6, 7]# Make x, y arrays for each graphy1 = [456.4, 412.98, 378.34, 345.98, 310.3, 297.89, 234.9]x2 = [1, 2, 3, 4, 5, 6, 7]y2 = [478.45, 450.9, 411.89, 369.6, 340.34, 305.67, 286.56]# use pylab to plot x and ypl.plot(x1, y1, '.-', label='Line1')pl.plot(x2, y2, '.-', label='Line2')pl.legend()pl.title('This is title')# give plot a titlepl.xlabel('X row') # make axis labelspl.ylabel('Y row')pl.xlim(0.0, 9.0)# set axis limitspl.ylim(200.0, 500.0)#pl.show()# show the plot on the screenpl.savefig('a.png')