first, you need to find the toolbox that you need. There are many people developing 3rd party toolboxes for Matlab, so there isn’t just one single place where you can find “the image processing toolbox”. That said, a good place to start looking is the Matlab Central which is a Mathworks-run site for exchanging all … Read more
In recent versions of MATLAB, there’s the containers.Map data structure. See MATLAB Map containers for more. This removes some of the restrictions when using STRUCTs. For example c = containers.Map c(‘foo’) = 1 c(‘ not a var name ‘) = 2 keys(c) values(c)
Consider this solution using the NDGRID function: sets = {[1 2], [1 2], [4 5]}; [x y z] = ndgrid(sets{:}); cartProd = [x(:) y(:) z(:)]; cartProd = 1 1 4 2 1 4 1 2 4 2 2 4 1 1 5 2 1 5 1 2 5 2 2 5 Or if you want … Read more
Use the size() function. >> size(A,2) Ans = 3 The second argument specifies the dimension of which number of elements are required which will be ‘2’ if you want the number of columns. Official documentation.
.mat files contain binary data, so you will not be able to open them easily with a word processor. There are some options for opening them outside of MATLAB: If all you need to do is look at the files, you could obtain Octave, which is a free, but somewhat slower implementation of MATLAB. You … Read more
These are the steps I would take to solve your problem in a vectorized way, starting with a given vector sig: First, threshold the vector to get a vector tsig of zeros and ones (zeroes where the absolute value of the signal drops close enough to zero, ones elsewhere): tsig = (abs(sig) >= eps); %# … Read more
I realize the question is stale, but for the benefit of Google: Matlab has a built-in feature for that. You write your comments in a certain style (a la JavaDoc) and they get picked up by the help and doc functions. It can be used to document classes, properties, and methods. It is surprisingly complete, … Read more
Consider the code: M = randi(100, [3 4]); %# input matrix ind = reshape(1:numel(M), size(M)); %# indices of elements ind = fliplr( spdiags( fliplr(ind) ) ); %# get the anti-diagonals ind(:,1:2:end) = flipud( ind(:,1:2:end) ); %# reverse order of odd columns ind(ind==0) = []; %# keep non-zero indices M(ind) %# get elements in zigzag order … Read more
One drawback to the ver function is that it only tells you what’s installed, not what has an available license. It’s possible to have a toolbox installed and no license to use it (or all the available licenses could be checked out by other users). A better choice is the license function, which (as you … Read more
Short answer : always use Set(‘Xdata’,…’). Example code: function PlotUpdate() x = 0:.1:8; y = sin(x); h = plot(x,y); y = sin(x.^3); set(h,’XData’,x,’YData’,y); end Long answer: There are three relevant measures by which one should choose the best method. Code clarity – How easy it is for someone to read your code? Runtime – How … Read more