[英]How to use OneHotEncoder output in ordinary least squares regression plot
[英]Is there a way to plot the ordinary least squares type of line on another plot?
這是一個執行此操作的示例多項式擬合器,如果您將日期格式轉換為數字類型,例如“經過的天數”,您可以直接將您的數據替換到示例中。 在這里,我使用了一個彎曲的二階多項式(二次)方程,設置在代碼的頂部,因為在我看來,數據的趨勢似乎有一些曲率而不是直線。
import numpy, matplotlib
import matplotlib.pyplot as plt
xData = numpy.array([1.1, 2.2, 3.3, 4.4, 5.0, 6.6, 7.7, 0.0])
yData = numpy.array([1.1, 20.2, 30.3, 40.4, 50.0, 60.6, 70.7, 0.1])
polynomialOrder = 2 # example quadratic
# curve fit the test data
fittedParameters = numpy.polyfit(xData, yData, polynomialOrder)
print('Fitted Parameters:', fittedParameters)
modelPredictions = numpy.polyval(fittedParameters, xData)
absError = modelPredictions - yData
SE = numpy.square(absError) # squared errors
MSE = numpy.mean(SE) # mean squared errors
RMSE = numpy.sqrt(MSE) # Root Mean Squared Error, RMSE
Rsquared = 1.0 - (numpy.var(absError) / numpy.var(yData))
print('RMSE:', RMSE)
print('R-squared:', Rsquared)
print()
##########################################################
# graphics output section
def ModelAndScatterPlot(graphWidth, graphHeight):
f = plt.figure(figsize=(graphWidth/100.0, graphHeight/100.0), dpi=100)
axes = f.add_subplot(111)
# first the raw data as a scatter plot
axes.plot(xData, yData, 'D')
# create data for the fitted equation plot
xModel = numpy.linspace(min(xData), max(xData))
yModel = numpy.polyval(fittedParameters, xModel)
# now the model as a line plot
axes.plot(xModel, yModel)
axes.set_xlabel('X Data') # X axis data label
axes.set_ylabel('Y Data') # Y axis data label
plt.show()
plt.close('all') # clean up after using pyplot
graphWidth = 800
graphHeight = 600
ModelAndScatterPlot(graphWidth, graphHeight)
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