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Aide de Scilab >> Traitement du Signal > miscellaneous > jmat

jmat

row or column block permutation. This function is obsolete.

Calling Sequence

[j]=jmat(n,m)

Arguments

n

number of block rows or block columns of the matrix

m

size of the (square) blocks

j

(m*n,m*n) matrix with m*m eyed blocks

Description

This function yields a square matrix j of size (m*n, m*n) that can be used for permuting the n blocks of m consecutive columns of a (m*n, m*n) square matrix W by W*j. For permuting the n blocks of m consecutive rows, use: j'*W

Example

m=grand(4,4,"uin",0,9).*.ones(2,2)
j=jmat(4,2)
m*j   // permutes blocks of columns
j'*m  // permutes blocks of rows

See Also

  • flipdim — retourne par blocs les éléments de x selon une dimension

History

VersionDescription
5.5.0 Tagged as obsolete, please use flipdim instead. Will be removed in Scilab 5.5.1.
Scilab Enterprises
Copyright (c) 2011-2017 (Scilab Enterprises)
Copyright (c) 1989-2012 (INRIA)
Copyright (c) 1989-2007 (ENPC)
with contributors
Last updated:
Thu Oct 02 13:54:32 CEST 2014