Rank: 1984 based on 36 downloads (last 30 days) and 4 files submitted
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Uriel Roque

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Electronics engineer working on instrumentation and software development for the optics industry.

Professional Interests:
Applied mathematics, spectrometry, optical instrumentation, neural networks, software components

 

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Files Posted by Uriel View all
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(last 30 days) 		Comments Rating
18 Apr 2007 active set algorithm solve linear least squares problem with nonnegative variables Author: Uriel Roque active set, least squares, nvlsq, linear, nnls, problems 11 3
  • 2.66667
2.7 | 3 ratings
03 May 2006 newton's algorithm for nnls Solves the linear least squares problem with nonnegative variables using the newton's algorithm Author: Uriel Roque linear algebra, newton, interiorpoint, nnls, nvlsq, mathematics 4 1
  • 4.0
4.0 | 1 rating
03 May 2006 predictor-corrector algorithm Solves linear least squares with nonnegative variables Author: Uriel Roque predictorcorrector, nvlsq, nnls, linear algebra, mathematics 13 1
  • 3.0
3.0 | 1 rating
02 May 2006 nnls block principal pivoting algorithm Author: Uriel Roque nnls, nvlsq, optimization, block pivoting 8 2
  • 4.5
4.5 | 2 ratings
Comments and Ratings on Uriel's Files View all
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15 Feb 2012 predictor-corrector algorithm Solves linear least squares with nonnegative variables Author: Uriel Roque Becker, Stephen

For a matrix with 600 rows and 500 columns, this function was quite slow. I would recommend another method. The 'active set' and 'block pivot' methods by the same author are both much faster. Those codes are:
http://www.mathworks.com/matlabcentral/fileexchange/10908-active-set-algorithm
and
http://www.mathworks.com/matlabcentral/fileexchange/8157-nnls
02 Mar 2008 predictor-corrector algorithm Solves linear least squares with nonnegative variables Author: Uriel Roque labreche, amine
29 Oct 2007 newton's algorithm for nnls Solves the linear least squares problem with nonnegative variables using the newton's algorithm Author: Uriel Roque itachy, uli

good
17 Apr 2007 active set algorithm solve linear least squares problem with nonnegative variables Author: Uriel Roque Reynolds, Greg

I experienced the same bug as the first comment.
09 Apr 2007 nnls block principal pivoting algorithm Author: Uriel Roque Reynolds, Greg

It works nicely for my matrices of about 1024x20 and is significantly faster than 'lsqnonneg'.

For 100 (random) trials, A is 1024x20, b is 1024x1:
'blocknnls' = 0.686167 seconds
'lsqnonneg' = 5.869711 seconds

Top Tags Applied by Uriel
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nnls, nvlsq, linear algebra, mathematics, active set
Files Tagged by Uriel View all
  • 1 - 4 of
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Updated   File Tags Downloads
(last 30 days) 		Comments Rating
18 Apr 2007 active set algorithm solve linear least squares problem with nonnegative variables Author: Uriel Roque active set, least squares, nvlsq, linear, nnls, problems 11 3
  • 2.66667
2.7 | 3 ratings
03 May 2006 newton's algorithm for nnls Solves the linear least squares problem with nonnegative variables using the newton's algorithm Author: Uriel Roque linear algebra, newton, interiorpoint, nnls, nvlsq, mathematics 4 1
  • 4.0
4.0 | 1 rating
03 May 2006 predictor-corrector algorithm Solves linear least squares with nonnegative variables Author: Uriel Roque predictorcorrector, nvlsq, nnls, linear algebra, mathematics 13 1
  • 3.0
3.0 | 1 rating
02 May 2006 nnls block principal pivoting algorithm Author: Uriel Roque nnls, nvlsq, optimization, block pivoting 8 2
  • 4.5
4.5 | 2 ratings

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