Where is the intercept in regress

When you use the "regress" function, where is the intercept?

Answer 1

[ARS]

Hi,

In my limited knowledge, you will have to include a very first column of 'ones' in the independent variables side(matrix). Then use regress function and the very first beta coefficient will be the intercept.

An example is available here:

http://www.colorado.edu/geography/class_homepages/geog_4023_s07/labs/lab3/html/lab3.html#2

click on 'Regress' on the page and you will notice "ones" function:

• X = [ ones(N,1) airqual(:,[18 19 20]) sin(Wd) cos(Wd) airqual(:,22)]*

Hope it helps.

Thanks.

[Nuchto]

That makes perfect sense, thanks!

[ARS]

Please "accept" the answer if it works fine.

Thanks.