Determine whether real-world value of one fi object is less than another
c = lt(a,b)
a < b
c = lt(a,b) is called for the syntax a < b when a or b is a fi object. a and b must have the same dimensions unless one is a scalar. A scalar can be compared with another object of any size.
a < b does an element-by-element comparison between a and b and returns a matrix of the same size with elements set to 1 where the relation is true, and 0 where the relation is false.