stepwise error

When I use stepwisefit I can define 'penter' and 'premove' typing stepwisefit(X,y,'penter',.02,'premove',.10)

However, when I am using stepwise if I type stepwise(X,y,'penter',.02,'premove',.10) I get the error:

??? Error using ==> stepwise Too many input arguments.

Answer 1

[David Young]

The specification for stepwise is

stepwise(X,y,inmodel,penter,premove)

so you don't need the strings 'penter' and 'premove'. You just give the parameter values as the fourth and fifth arguments. However, if you want to specify penter and premove, you do need to give a value for the initial model.