add trendline to plot matplotlib

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Tom
22 Mar 2020
1# plot the data itself
2pylab.plot(x,y,'o')
3
4# calc the trendline
5z = numpy.polyfit(x, y, 1)
6p = numpy.poly1d(z)
7pylab.plot(x,p(x),"r--")
8# the line equation:
9print "y=%.6fx+(%.6f)"%(z[0],z[1])
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