cummax Cumulative maximum M = cummax(A) M = cummax(A,dim) M = cummax(_,direction) A: positive integer valueFor complex elements, cummax compares the magnitude of elements. If the magnitude are same, phase angles are compared. dim: Dimension to operate alongIf no dimension is specified, then the default value is the first array dimension whose value is greater than 1 direction: Direction of cumulationIf the direction is forward, cummax works from 1 to end of the active dimension. Otherwise, it works in the opposite sense The function returns the cumulative maximum elements of the input vector/array. Ayush Baid