Question

In my matlab program, I want to determine whether a variable or output of a function is empty or not, before going further.

Actually, I’ve written a function which calculates an intersection point between two line segments. if there is no intersection, the function returns nothing (so the variable assigned by the function will be empty matrix).

I know I could use size function but is there any better way to do that?

Answer 1

You can use isempty. For instance:

>> isempty([])  ans =      1  >> isempty([42])  ans =      0