octave

I need to make a .fig file that can be reopened in Matlab, but I am working in Octave. But apparently there is no saveas command in Octave. This is what I am trying: octave:3> plot([1,2,3],[45,23,10]) octave:4> saveas(gcf,'myfig.fig') error: `saveas' undefined near line 4 column 1 octave:4> Currently the Matlab fig file format is a proprietary binary file format. Octave doesn't know how to export to this format and won't be able to until it is reverse engineered. The fig format that Octave knows about is a different fig format used by Xfig with the same extension name, but nothing else in

More specifically, numpy: In [24]: a=np.random.RandomState(4) In [25]: a.rand() Out[25]: 0.9670298390136767 In [26]: a.get_state() Out[26]: ('MT19937', array([1248735455, ..., 1532921051], dtype=uint32), 2,0,0.0) octave: octave:17> rand('state',4) octave:18> rand() ans = 0.23605 octave:19> rand('seed',4) octave:20> rand() ans = 0.12852 Octave claims to perform the same algorithm (Mersenne Twister with a period of 2^{19937-1}) Anybody know why the difference? Unfortunately the MT19937 generator in Octave does not allow you to initialise it using a single 32-bit integer as np.random.RandomState

A while back I provided an answer to this question . Objective: count the number of values in this matrix that are in the [3 6] range: A = [2 3 4 5 6 7; 7 6 5 4 3 2] I came up with 12 different ways to do it: count = numel(A( A(:)>3 & A(:)<6 )) %# (1) count = length(A( A(:)>3 & A(:)<6 )) %# (2) count = nnz( A(:)>3 & A(:)<6 ) %# (3) count = sum( A(:)>3 & A(:)<6 ) %# (4) Ac = A(:); count = numel(A( Ac>3 & Ac<6 )) %# (5,6,7,8) %# prevents double expansion %# similar for length(), nnz(), sum(), %# in the same order as (1)-(4) count = numel(A( abs(A-(6+3)/2)<3/2 )) %# (9,10,11,12) %# prevents

I have a large matrix (2e6 x 3) which I have to write to a text file. dlmwrite takes about 230s to achieve this task. From your experience what is the fastest way to write a large matrix to a text file? The following applies to MATLAB, but I suggest you try it in Octave. First of all, if you can - transpose the matrix. Here are examples using fprintf and csvwrite (essentially dlmwrite ) A = rand(3, 1e6); tic; fid = fopen('data.txt', 'w+'); for i=1:size(A, 1) fprintf(fid, '%f ', A(i,:)); fprintf(fid, '\n'); end fclose(fid); toc tic; csvwrite('data.txt', A); toc; Elapsed time is 1.311512 seconds

I have error in installing general package using the instruction. pkg install -forge general and get the message octave:3> pkg install -forge general In file included from /usr/local/octave/3.8.0/lib/gcc47/gcc/x86_64-apple-darwin13/4.7.3/include/stdint.h:3:0, from /usr/local/octave/3.8.0/include/octave-3.8.0/octave/oct-conf-post.h:167, from /usr/local/octave/3.8.0/include/octave-3.8.0/octave/config.h:3351, from /usr/local/octave/3.8.0/include/octave-3.8.0/octave/../octave/oct.h:31, from SHA1.cc:19: /usr/local/octave/3.8.0/lib/gcc47/gcc/x86_64-apple-darwin13/4.7.3/include-fixed/stdint.h:27:32:

I am getting following warning after launching octave. i used installation instruction from here . What could be the issue? Are these major warnings? I am using windows. warning: gmsh does not seem to be present some functionalities will be disabled warning: dx does not seem to be present some functionalities will be disabled warning: function C:\Octave\Octave3.6.0_gcc4.6.2\share\octave\packages\statistics- 1.1.0\fstat.m shadows a core library function That's because you have installed packages that you probably do not need (otherwise you would already noticed more than just the warning