5.0 | 2 ratings Rate this file 118 downloads (last 30 days) File Size: 15.19 KB File ID: #20186

spok: checks if a MATLAB sparse matrix is OK

05 Jun 2008 (Updated 20 Aug 2008)

Useful for mexFunction authors only

File Information
Description	This function is very helpful for authors of mexFunctions that return sparse matrices to MATLAB. It is of no use at all to those who work purely with M-files (if you do not write C mexFunctions, please don't bother downloading or rating this file). A MATLAB sparse matrix is stored in a compressed-column form that can be difficult to generate in a C or Fortran mexFunction. This function, spok, will determine if your matrix is valid. You can also call the C spok function from inside your mexFunction.
MATLAB release	MATLAB 7.6 (R2008a)
Zip File Content
Other Files	spok/Contents.m, spok/private/spok_invalid.c, spok/private/spok_invalid.mexw32, spok/spok.c, spok/spok.h, spok/spok.m, spok/spok.mexw32, spok/spok_install.m, spok/spok_mex.c, spok/spok_test.m

Tags for This File
Everyone's Tags	linear algebra, mex, sparse
Tags I've Applied
Add New Tags	Please login to tag files.

Comments and Ratings (1)
01 Dec 2008	Qun HAN	Great work. But the submmited file is in c. I want to know if a MATLAB sparse matrix is passed into a FORTRAN mex file how to indexing it?

Please login to add a comment or rating.

Updates
20 Aug 2008	Removed POSIX standard function "snprintf" which Microsoft doesn't comprehend. Should now work on Windows.

Tag Activity for this File
Tag	Applied By	Date/Time
linear algebra	Tim Davis	22 Oct 2008 10:04:54
sparse	Tim Davis	22 Oct 2008 10:04:54
mex	Tim Davis	22 Oct 2008 10:04:54

Public Submission Policy

NOTICE: Any content you submit to MATLAB Central, including personal information, is not subject to the protections which may be afforded information collected under other sections of The MathWorks, Inc. Web site. You are entirely responsible for all content that you upload, post, e-mail, transmit or otherwise make available via MATLAB Central. The MathWorks does not control the content posted by visitors to MATLAB Central and, does not guarantee the accuracy, integrity, or quality of such content. Under no circumstances will The MathWorks be liable in any way for any content not authored by The MathWorks, or any loss or damage of any kind incurred as a result of the use of any content posted, e-mailed, transmitted or otherwise made available via MATLAB Central. Read the complete Disclaimer prior to use.