Thread Subject: glmfit without constant

I am performing a probit regression without constant in order to compute the mcfadden r-square:

[bintercept dev stat]=glmfit(x,[y n],'binomial','probit')

I define the array x without regressors in this way:

x=zeros(size(y,1),0)

but the function glmfit give me this message:

"??? Error using ==> unknown
Matrix dimensions must agree.

Error in ==> glmfit>wfit at 280
xw = x .* sw(:,ones(1,c));

Error in ==> glmfit at 169
   [b,R] = wfit(z - offset, x, w);"

otherwise, I could change the options of glmfit fucntion to exclude the constant, but I do not know the exact syntax and my attempts were wrong. What is the correct syntax in the function to remove the constant?

thanks for your help

Luca

Luca Di Simone wrote:

> otherwise, I could change the options of glmfit fucntion to exclude the constant, but I do not know the exact syntax and my attempts were wrong. What is the correct syntax in the function to remove the constant?

glmfit(ones(size(y),[y n],'binomial','link','probit','constant','off')