#GNU OCTAVE MATRIX OPERATIONS INSTALL#
#GNU OCTAVE MATRIX OPERATIONS FULL#
#GNU OCTAVE MATRIX OPERATIONS CODE#
#GNU OCTAVE MATRIX OPERATIONS FREE#

Inspecting in detail, the source of the error is a matrix multiplication.ДЇor matrices larger than 51x51 Octave crashes with a 'panic: Illegal instruction - stopping myself.' message. The compilation proccess terminates normally but in make check an error occurs checking the scripts/special-matrix/hadamard.m function. I've compiled the 3.4.0 version in my new Debian GNU/kFreeBSD installation. Here is a small example in C to check the behavior of ATLAS (modify the #define N line in order to see the results: with 51 runs but with 52 or more crash in Debian GNU/kFreeBSD):Д¬blas_dgemm(CblasColMajor,CblasNoTrans,CblasNoTrans,N,N,N,1.0,A,N,B,N,1.0,C,N) Д¬ompiling order: gcc test.c -o test -lcblas I'll send a message in the ATLAS mailing lists. I'm not a user of pure FreeBSD system so I don't know if the error is present there. But I don't know the reason for the correct behavior in Linux and incorrect in kFreeBSD. In Debian GNU/kFreeBSD repositories is provided the 3.8.3 version of ATLAS that is the same as in the Debian GNU/Linux repos.

#GNU OCTAVE MATRIX OPERATIONS INSTALL#

I can't check the 3.4.0 version because I have no time to recompile it with a reference BLAS, but if I install the Octave 3.2.4 from the Debian kFreeBSD repos and I use only the reference BLAS the error dissapears. > subplot(1,2,1) plot(t,y1) % Divides plot into 1x2 grid > print -dpng 'myPlot.png' % Saves plot to PNG > ylabel('value') % - Add labels, legend and title > plot(t,y2,'r') % Add to graph with cos plot in red

> hold on % Says to wait with plot instead of overwriting > % DRAW SIN AND COS CURVE ON SAME GRAPH: > plot(t,y1) % Show nice sin curve in default blue. > sum(sum(A)) % Sums all elements in A and would return (27). > sum(a) % Adds all elements in a and returns (17.5). % Where: c = col, r = row of any value >= 7. > r,c = find(A>=7) % Finds the row, column index of all values >= 7. > A = magic(3) % 3x3 matrix where all cols up to same value. % WARNING: if matrix does max for each column. > val = max % Returns (3) max value in v. > exp(v) % ' ' ' ' ' ' base e exponentiaion * B % element-wise multiplication (must be same dimensions) > A * C % matrix multiplication (results is 3x2 matrix)

> v = % NOTE: commas behave same as semicolons

#GNU OCTAVE MATRIX OPERATIONS CODE#

you can write code in files ending with '.m' (example: myFunction.m) and call those files / functions so long as you are in that directory.

' cd ls pwd' - these common unix commands work as you'd expect.

' a=1,b=2,c=3' - comma chain commands.

' ' - put this on the end of a line to suppress output, otherwise 'v = ' will show all 100 lines with.

#GNU OCTAVE MATRIX OPERATIONS FULL#

If you install Octave you can copy and paste these commands to see the full output from each line. Often I'll explain output in theВ % comments, but generally I have saved space by not showing any output lines. Here I go through some commands - roughly in the order I saw them in the online machine learning course.

It works on all platforms, although on windows you will need to install it with Cygwin. Octave is an excellent language to prototype machine learning. Most of them I actually saw in an excellent online machine learning course which is referenced and acknowledged properly below, and was my reason for learning Octave. This page is my own 'cheat sheet' where I list out most of the commands I'll need.

#GNU OCTAVE MATRIX OPERATIONS FREE#

The language is very similar to and *mostly* comaptible with MATLAB - but unlike Matlab is free and open source under a GNU General Public License. It provides its own command line interface for solving linear and nonlinear problems and plotting graphs. GNU Octave is a high-level programming language, primarily intended for numerical computations, and very useful for matrix operations.

Gnu octave matrix operations