How could I add trendline to a dot graph drawn using matplotlib.scatter?
Answers:
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Method 1
as explained here
With help from numpy one can calculate for example a linear fitting.
# plot the data itself pylab.plot(x,y,'o') # calc the trendline z = numpy.polyfit(x, y, 1) p = numpy.poly1d(z) pylab.plot(x,p(x),"r--") # the line equation: print "y=%.6fx+(%.6f)"%(z[0],z[1])
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