Scilab Home page | Wiki | Bug tracker | Forge | Mailing list archives | ATOMS | File exchange
Please login or create an account
Change language to: English - Français - Português - 日本語

Please note that the recommended version of Scilab is 6.0.0. This page might be outdated.
See the recommended documentation of this function

Справка Scilab >> Optimization and Simulation > Semidefinite Programming > unpack

unpack

Uncompress a list of block-diagonal symmetric matrices.

Calling Sequence

A=unpack(CA,blocksizes)

Arguments

CA

p-by-n real matrix of doubles, a compressed representation of A.

blocksizes

b-by-1 real matrix of doubles, the sizes of the blocks.

A

m-by-n real matrix of doubles, the entries of a list of block-diagonal symmetric matrices. n is the number of matrices stored into A.

Description

This function is the reverse of the pack function. It uncompresses a list of symmetric block-diagonal matrices which have been compressed by pack.

Examples

// Define a compressed list of symmetric block-diagonal matrices.
// There are 3 matrices in the list, as indicated by the 3 columns in CA.
// Only the nonzero entries are stored in CA. 
// Only the upper part of the symmetric diagonal matrices are stored in CA.
CA = [
2,1,2;  
1,2,2;   
2,1,2;   
3,1,3;   
1,3,4;   
3,1,4
]
// Each of the 3 block-diagonal matrices has 2 blocks. 
// Define the size of the two blocks:
// the first block has size 2, 
// the second block has size 2.
blocksizes=[2,2];
// Unpack the matrices.
A=unpack(CA,blocksizes)

See Also

  • pack — Compress a list of block-diagonal symmetric matrices.
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 14:01:07 CEST 2014