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Multiple linear regression coefficient calculation

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Priyanka Nehra
Priyanka Nehra on 24 Aug 2020
Commented: Priyanka Nehra on 26 Aug 2020
Hello,
I want to perform regression on three indepndent variables (x1, x2, x3 ) and one dependent variable (y). To perform y= b0+ b1.x1+b2*x2+ b3*x3 I need to calculate coefficient value b0 to b3. For which I am using b = regress(y,X). how to evaluate X using x1,x2,x3.

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Answers (1)

J. Alex Lee
J. Alex Lee on 24 Aug 2020
Assuming your data are in rows (y is a column vector), isn't that just
X=[ones(size(x1)),x1,x3,x3]
see

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J. Alex Lee
J. Alex Lee on 24 Aug 2020
do you have nan's in your x1, x2, x3, or y? how many observations do you have? you need at least 4 and possibly more in case of degeneracy.

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