TF = issorted (A) returns true if the elements of the datetime array A are sorted in ascending (non-decreasing) order along its first non-singleton dimension, and false otherwise. For a matrix, every column (or row, depending on the operating dimension) must be sorted for TF to be true. Not-A-Time (NaT) elements are treated as greater than any other value, so an array is sorted in ascending order only when its NaT elements come last.

TF = issorted (A, dim) operates along dimension dim.

TF = issorted (A, direction) tests whether the elements are sorted according to direction, which may be one of:

• 'ascend' (default) tests non-decreasing order.
• 'descend' tests non-increasing order.
• 'monotonic' tests non-decreasing or non-increasing order.
• 'strictascend' tests strictly increasing order.
• 'strictdescend' tests strictly decreasing order.
• 'strictmonotonic' tests strictly monotonic order.

Source Code: datetime