issorted

Determine if array is sorted.

Syntax

  • tf = issorted(A)

  • tf = issorted(A, dim)

  • tf = issorted(..., direction)

  • tf = issorted(A, 'rows')

Input argument

  • A - an nelson's variable (double, single, int8, int16, int32, int64, uint8, uint16, uint32, uint64, logical, char, string, cell).

  • dim - Dimension to operate along: positive integer scalar.

  • direction - Sorting direction: 'ascend' (default) or 'descend'.

  • 'rows' - returns true when the elements of the first column of a matrix are sorted.

Output argument

  • tf - a logical: true if array is sorted.

Description

tf = issorted(A) returns true if the elements of A are sorted in ascending order, and false otherwise.

Example

x = [1 2 3 4];
issorted(x) % returns true
x = [1 3 2 4];
issorted(x) % returns false

% Check if a matrix is sorted by rows
A = [1 2 3; 4 5 6; 7 8 9];
issorted(A, 'rows') % returns true
A = [1 2 3; 7 8 9; 4 5 6];
issorted(A, 'rows') % returns false

See also

sort.

History

Author

Allan CORNET

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