root/MachineLearningWithMATLAB/Regression_FuelEconomy/R2.m @ 11
| 10 | anderm8 | function R_Sqr = R2(Y, YHat )
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%RSQUARED
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SStot = sum((Y - mean(Y)).*(Y - mean(Y)));
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% Calculate residuals
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resid = Y - YHat;
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% Square residuals
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resid_sqrd = resid.*resid;
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% Take the sum of the squared residuals
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SSerr = sum(resid_sqrd);
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% Calculate R^2
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R_Sqr = 1 - (SSerr/SStot);
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end
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