Help!!!!!!!! How to replace all the zeros in an array with -1?

X = [1 0 0 0 1 0 0 1 1 0 1 0 1 1 1] i want to replace all zeros with -1 in array. anybody can help ?

Answer 1

[KSSV]

X(X==0) = -1 ;

[sabahat sherien]

Thank you so much.

Answer 2

[Stephen23]

X(~X) = -1

[sabahat sherien]

Thanks its working.