Predictions for stepwise regression model

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.

Answer 1

[Star Strider]

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.