Is there a Matlab conditional IF operator that can be placed INLINE like VBA's IIF

Question

In VBA I can do the following:

A = B + IIF(C>0, C, 0)

so that if C>0 I get A=B+C and C<=0 I get A=B

Answer 1

This is more of an addenum to Alex's answer.

Alex's method doesn't work when you want to return inf

In these cases you often end up getting a 0*inf figure, which MATLAB will evaluate to NaN. Problematic... We can avoid this multiplication using a lookup instead.

As an example, a useful barrier function in convex optimization is something that behaves like log everywhere positive, and -inf elsewhere. Here is how you might create such a function using a lookup:

INF_CONDITION = [0, inf];
fn_logbr = @(x) (x>0)*log(x) - INF_CONDITION( 1+(x<=0) )

Inline conditionals are a hack, and you lose lazy evaluation. You have to be careful. However, having semantic code is really nice, and its easier to share your code when you can't guarantee everyone's environments are the same.