octave

I am trying to install general package (general-1.3.4.tar.gz) to octave 3.8.0. Im using mac osx Yosemite. Im getting segmentation fault. This occurs no matter which package I try to install (for example singal). I have xcode and command line tools installed. All help will be appreciated. Here is the error i get when executing pkg install general-1.3.4.tar.gz: octave:3> pkg install general-1.3.4.tar.gz /usr/local/octave/3.8.0/bin/mkoctfile-3.8.0: line 512: 15159 Segmentation fault: 11 /usr/local/octave/3.8.0/bin/g++-mp-4.7 -c -fPIC -I/usr/local/octave/3.8.0/include/octave-3.8.0/octave/.. -I/usr

Is there a vectorised way to do the following? (shown by an example): input_lengths = [ 1 1 1 4 3 2 1 ] result = [ 1 2 3 4 4 4 4 5 5 5 6 6 7 ] I have spaced out the input_lengths so it is easy to understand how the result is obtained The resultant vector is of length: sum(lengths) . I currently calculate result using the following loop: result = ones(1, sum(input_lengths )); counter = 1; for i = 1:length(input_lengths) start_index = counter; end_index = counter + input_lengths (i) - 1; result(start_index:end_index) = i; counter = end_index + 1; end EDIT: I can also do this using arrayfun

I am using Octave on Window vista. I am using 4 package in my code. But every time I restart octave, I have to load manually from command line, 'pkg load ...' Is there a way to load them permanently so that whenever Octave is started it finds them in its path. When Octave starts, it runs ~/.octaverc . If you want Octave to automatically load a package, simply add a pkg load pkg-name command to it. If the files does not exist, create it. If you do this, remember that other people may not have Octave configured to load packages at startup. Therefore, if you write code for others, remember that

I have sets of data in a matrix. I want to plot on set and then use a keyboard input to move to another one. It's simply possible this way: for t=1:N plot(data(:,t)) pause end but I want to move forward and backward in time t (e.g. using arrows). OK, it could be done like this: direction = input('Forward or backward?','s') if direction=='forward' plot(data(:,ii+1)) else plot(data(:,ii-1)) end but isn't there something more elegant? (On one click without getting the figure of the sight - it's a big full sreen figure.) You can use mouse clicks combined with ginput . What you can do is put your

I have two vectors (single row matrices). Assume that we already know the length len . A = [ x1 x2 x3 x4 x5 .... ] B = [ y1 y2 y3 y4 y5 .... ] To calculate Euclidean distance between them what is the fastest method. My first attempt is: diff = A - B sum = 0 for column = 1:len sum += diff(1, column)^2 distance = sqrt(sum) I have loop through this methods millions of times. So, I am looking for something which is fast and correct. Note that I am not using MATLAB and don't have pdist2 API available. diff = A - B; distance = sqrt(diff * diff'); or distance = norm(A - B); [val idx] = sort(sum(abs

I have a struct in Octave that contains some big arrays. I'd like to know the names of the fields in this struct without having to look at all these big arrays. For instance, if I have: x.a=1; x.b=rand(3); x.c=1; The obvious way to take a gander at the structure is as follows: octave:12> x x = scalar structure containing the fields: a = 1 b = 0.7195967 0.9026158 0.8946427 0.4647287 0.9561791 0.5932929 0.3013618 0.2243270 0.5308220 c = 1 In Matlab, this would appear as the more succinct: >> x x = a: 1 b: [3x3 double] c: 1 How can I see the fields/field names without seeing all these big arrays?