Is it possible for REGSTATS to regress models without constant terms in Statistics Toolbox 7.4 (R2010b)?

I would like to know if REGSTATS can regress models without constant terms.

Answer 1

[MathWorks Support Team]

REGSTATS can be used to regress models without constant terms, using its MODEL argument.

Here is an example illustrating how to regress the first column of a matrix on the second column, third column, and product of those columns:

rand('twister', 1)

a = rand(10,3);

stats = regstats(a(:,1),a(:,2:end),[1 0;0 1;1 1]);

stats.beta

ans =

      1.0103

      0.7275

     -1.3787

This agrees with the results found from left division:

[a(:,2:3) prod(a(:,2:3),2)]\a(:,1)

ans =

      1.0103

      0.7275

     -1.3787

Note that this method is appropriate for older releases MATLAB, the earliest being R12.1.