replacing components of a matrix

how to generate a matrix that replaces all components of a previous matrix lying between 2.9 and 3.2, by -1?

Answer 1

[Matt Kindig]

%your matrix is M
isBetween = (M >= 2.9) & (M <= 3.2);
M(isBetween) = -1

[Charlene]

thx a lot however an other problem turned up; the other components that are not int between the interval became 0, while i need them to be equal as the previous matrix which is (A=random('norm',3,0.2,100,100))