Rank: 608 based on 114 downloads (last 30 days) and 8 files submitted
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Files Posted by Ivo View all
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02 Apr 2011 High Accuracy Timer for Windows High-resolution performance counter Author: Ivo Houtzager clock, accuracy, timer, high resolution, mex, counter 18 5
  • 4.75
4.8 | 4 ratings
02 Apr 2011 Simulink Block for Real Time Execution C-MEX S-function that reduces the execution speed of a model close to real time. Author: Ivo Houtzager simulink real time ex..., simulink, real time simulation 26 0
02 Apr 2011 Rank-Revealing QR factorization Rank-Revealing QR factorization of an array Author: Ivo Houtzager linear algebra, rankrevealing qr fact..., mathematics 9 2
07 Oct 2010 Least squares with minimum-norm solution Least squares with minimum-norm solution Author: Ivo Houtzager linear algebra, least, squares, minimum, norm, low 9 4
  • 5.0
5.0 | 1 rating
06 Oct 2010 QR/RQ/QL/LQ factorizations QR/RQ/QL/LQ factorizations of an array. Author: Ivo Houtzager ql, lq, rq, linear algebra, qr, factorization 29 14
  • 3.16667
3.2 | 7 ratings
Comments and Ratings by Ivo View all
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05 Oct 2010 QR/RQ/QL/LQ factorizations QR/RQ/QL/LQ factorizations of an array. Author: Ivo Houtzager

Thank you for your suggestions. I will go to work again.
04 Oct 2010 QR/RQ/QL/LQ factorizations QR/RQ/QL/LQ factorizations of an array. Author: Ivo Houtzager

Thank you for your suggestions. But I have some remarks:

1) It is not hard coded. If you include the headers "lapack.h" and "blas.h" (see also "factor.h") it will automatically add underscore during preprocessing.

2) I will correct that.

3) For which versions is this?

4) This option is already included in make_factor.m

5) There is already a make_factor.m included for building the mex-files.
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10 Jan 2012 Rank-Revealing QR factorization Rank-Revealing QR factorization of an array Author: Ivo Houtzager Bratman, Jeshua

Here's how I managed to compile librrqr.a

# first download the package (it is actually a shell script that creates a bunch of files)
wget http://www.netlib.org/netlib/toms/782 -O 782.sh

# remove the top 3 lines with the ACM info
sed -i '1,3d' 782.sh

# replace all $( and $?in the cat areas for makefiles with \$( and \$?to work with newer versions of sh
sed -i 's/\$[\(]/\\$\(/g' 782.sh
sed -i 's/\$[\?]/\\$?/g' 782.sh

# now extract the rrqr_acm directory
sh 782.sh

To compile go into rrqr_acm/lib and run make. You will probably need to first edit the Makefile and change the fortran compiler from f77 to gfortran and add -fPIC to the OPTS. After running make, there should be a file rrqr.a in the rrqr_acm directory. Move this to librrqr.a in the directory with the matlab and c files and now you should be able to compile the mex file.
26 Sep 2011 QR/RQ/QL/LQ factorizations QR/RQ/QL/LQ factorizations of an array. Author: Ivo Houtzager Pablo

Hi, i'm a student and i have some problems with the functions.
- How it works?, because i put,for example, [L,Q]=LQ(A) and matlab displays this message:
"??? Attempt to execute SCRIPT lq as a function"
I put all files in the current directory, and i did File -> Set Path....., but the same message is displayed.
Please help! :(
29 May 2011 QR/RQ/QL/LQ factorizations QR/RQ/QL/LQ factorizations of an array. Author: Ivo Houtzager Vincent

Excellent functions. Works perfect for me. Thank you very much!
12 Oct 2010 Least squares with minimum-norm solution Least squares with minimum-norm solution Author: Ivo Houtzager Deng, Siyi

well written .
05 Oct 2010 QR/RQ/QL/LQ factorizations QR/RQ/QL/LQ factorizations of an array. Author: Ivo Houtzager Houtzager, Ivo

Thank you for your suggestions. I will go to work again.
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linear algebra, simulink, accuracy, clock, counter
Files Tagged by Ivo View all
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Updated   File Tags Downloads
(last 30 days) 		Comments Rating
02 Apr 2011 High Accuracy Timer for Windows High-resolution performance counter Author: Ivo Houtzager clock, accuracy, timer, high resolution, mex, counter 18 5
  • 4.75
4.8 | 4 ratings
02 Apr 2011 Simulink Block for Real Time Execution C-MEX S-function that reduces the execution speed of a model close to real time. Author: Ivo Houtzager simulink real time ex..., simulink, real time simulation 26 0
02 Apr 2011 Rank-Revealing QR factorization Rank-Revealing QR factorization of an array Author: Ivo Houtzager linear algebra, rankrevealing qr fact..., mathematics 9 2
07 Oct 2010 Least squares with minimum-norm solution Least squares with minimum-norm solution Author: Ivo Houtzager linear algebra, least, squares, minimum, norm, low 9 4
  • 5.0
5.0 | 1 rating
06 Oct 2010 QR/RQ/QL/LQ factorizations QR/RQ/QL/LQ factorizations of an array. Author: Ivo Houtzager ql, lq, rq, linear algebra, qr, factorization 29 14
  • 3.16667
3.2 | 7 ratings

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