Sort (DSP Blockset)

Sort the elements in a vector by value.

Library

Statistics, in Math Functions

Description

The Sort block sorts the elements in a real input vector by value using a Quicksort algorithm. The output vector, y, contains the input values arranged in order of ascending or descending magnitudes, as specified by the Sort order parameter.

[y,i] = sort(u(:))          % equivalent MATLAB code (ascending)
[y,i] = flipud(sort(u(:)))  % equivalent MATLAB code (descending)

The Mode parameter specifies the block's output, and can be set to Value, Index, or Value and Index:

Value - The block outputs only the sorted vector, y.
Index - The block outputs the index vector, i, that permutes the input to the desired sorting order:
Value and Index - The block generates both of the above outputs.

Note that a matrix input is sorted as a single vector, u(:), rather than column by column.

Note
If you expect to generate code for the Sort block using the Real-Time Workshop, you should ensure that inputs are contiguous in memory. See the Contiguous Copy block for more information.

Dialog Box

Mode: The block's mode of operation: Output the sorted vector, the index vector, or both.
Sort order: The order in which to sort the input values, Descending or Ascending. This parameter is not tunable in Simulink's external mode.