Predictions for stepwise regression model

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Anaya Kharwadkar
Anaya Kharwadkar 2020-10-17
回答： Star Strider 2020-10-17
Hi all,
I have created a regression model using the stepwisefit function. I have 5 independent variables (x1,x2,x3,x4,x5), and the stepwisefit chose the variables x3 and x5 for the model. The code is as follows:
matrix = [x1 x2 x3 x4 x5]
b = stepwisefit(matrix , Y)
Now, I want to predict values for Y using this model. I used the predict function and the following code:
prediction1 = predict(b,matrix);
But this is throwing up an error: Undefined function 'predict' for input arguments of type 'double'.
What am I doing wrong? Any help would be appreciated.

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Star Strider
Star Strider 2020-10-17
No predict function is defined for stepwisefit.
One is defined for stepwiselm:
m = stepwiselm(matrix , Y)
prediction1 = predict(m,matrix);
See if that does what you want.

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