Question

I’m looking for Matlab equivalent of c# condition ? true-expression : false-expression conditional assignment. The most I know of is a = 5>2, which is true\false assignment,
but is there any one line conditional assignment for
if condition a=1;else a=2; end?

Answer 1

One line conditional assignment:

a(a > 5) = 2;

This is an example of logical indexing, a > 5 is a logical (i.e. Boolean or binary) matrix/array the same size as a with a 1 where ever the expression was true. The left side of the above assignment refers to all the positions in a where a>5 has a 1.

b = a > 5; % if a = [9,3,5,6], b = [1,0,0,1]
a(~b) = 3;
c = a > 10;
a(b&c) = ...

Etc…you can do pretty much anything you’d expect with such logical arrays.