If then statement vs Grid

[stevengj]

@Albert_Zevelev

My goal is to create a piecewise function in Julia parsimoniously.

I’m not sure why you’re using ranges for this. Why not:

u(x,y) = y - (x != 0)

or

u(x,y) = x == 0 ? y : y - 1

?

@Albert_Zevelev

Problem is I want the function FC(x) = (x==0):(0):(1) to return 0 for x=0 and 1 for x\neq 0.

That’s just the function FC(x) = x != 0, or simply the function !iszero. (A boolean value true/false in Julia corresponds to 1/0, respectively.)