The test of goodness of fit is realized by the coefficient of determination R2 . R2 can explain the regression curve fitting degree of observed data. When 0oR2o1, just the closer R2 approaches 1, the better fitting efficiency we get
The test of goodness of fit is realized by the coefficient ofdetermination R2. R2 can explain the regression curve fitting degreeof observed data. When 0oR2o1, just the closer R2 approaches 1,the better fitting efficiency we get