Stepwise regression with no Constant

Matlab includes a constant as a default ..... is it possible to do a stepwise regression in Matlab without a constant? Thanks

Answer 1

[Oleg Komarov]

It doesn't say so neither in stepwisefit nor in stepwise.

An example:

load hald
stepwise(ingredients,heat)

[Lev Prislan]

It does say: "stepwise automatically includes a constant term in all models. Do not enter a column of 1s directly into X."