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Files Posted by Ivo View all
Updated   File Tags Downloads
(last 30 days)
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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
Updated File Comments Rating
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.

Comments and Ratings on Ivo's Files View all
Updated File Comment by Comments Rating
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.

Top Tags Applied by Ivo
linear algebra, simulink, accuracy, clock, counter
Files Tagged by Ivo View all
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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