How can I create a piecewise inline function in MATLAB?

Question

I have a function in MATLAB which takes another function as an argument. I would like to somehow define a piecewise inline function that can be passed in. Is this somehow possible in MATLAB?

Edit: The function I would like to represent is:

f(x) = { 1.0,  0.0 <= x <= 0.5,
         -1.0, 0.5 < x <= 1.0

where 0.0 <= x <= 1.0