如何在 python matplotlib 点(散点)图中添加趋势线?

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时间:2020-08-19 00:29:32  来源:igfitidea点击:

How to add trendline in python matplotlib dot (scatter) graphs?

pythonscattertrendline

提问by user3476791

How could I add trendline to a dot graph drawn using matplotlib.scatter?

如何将趋势线添加到使用 matplotlib.scatter 绘制的点图?

采纳答案by martinenzinger

as explained here

为解释在这里

With help from numpy one can calculate for example a linear fitting.

在 numpy 的帮助下,可以计算例如线性拟合。

# 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])