sort

Sort array elements by quick sort algorithm.

Syntax

• B = sort(A)
• B = sort(A, dim)
• B = sort(..., direction)
• B = sort(..., name, value)
• [B, I] = sort(...)

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'.
• name, value - name-value pair arguments.

Output argument

• B - sorted array.
• I - sort index.

Description

sort implements quick sort algorithm.

name-value pair arguments:

'MissingPlacement' - Placement of missing values: 'auto' (default), 'first', 'last'.

'ComparisonMethod' - Element comparison method: 'auto' (default), 'real', 'abs'.

Used function(s)

qsort (stl)

Bibliography

Quick sort algorithm from Bentley and McIlroy's "Engineering a Sort Function". Software - Practice and Experience

Examples

ComparisonMethod

A = [10+20i 30+i 10i 0 -10i];
B = sort(A,'ComparisonMethod', 'auto')
B = sort(A, 'ComparisonMethod', 'real')
B = sort(A, 'ComparisonMethod', 'abs')

MissingPlacement

A = [NaN 3 6 0 NaN];
[B, I] = sort(A, 'MissingPlacement', 'auto')
[B, I] = sort(A, 'MissingPlacement', 'first')
[B, I] = sort(A, 'MissingPlacement', 'last')

See also

issorted, unique.

History

Author

Allan CORNET