Search Results

The function Triangle() is clearly a script that you turned into a function. I personally don't like putting clc, clear and close at the top of my scripts, but I see this a lot, and it's not a terribl …

MATLAB first included a JIT (Just In Time) compiler in 2006 I think, and it has been steadily improving over the years. … In MATLAB R2015b, they introduced a completely new JIT, and since then the difference between trivial loops and vectorized code is no longer important, and a more complex loop is oftentimes faster than …

If we let MATLAB do the memory management (MATLAB will double the storage when appending elements to an array, and does so much more efficiently than this user's code), and store the priorities in a numeric …

Instead of A = Data{n,3}(18:length(Data{n,3}),1); do A = Data{n,3}(18:end,1); Repeatedly extending an array Yes, you can extend an array in MATLAB. … Not using vectorized operations Loops are rather fast nowadays in MATLAB, so much so that vectorizing an operation (removing the explicit loop in favour of vectorized operations) is not guaranteed to improve …

comparisons: % original code new_r = mod(new_r,A)+1; % alternative I = new_r>A; new_r(I) = new_r(I)-A; I = new_r<1; new_r(I) = new_r(I)+A; This is actually slower in Octave, but it's possible that MATLAB …

To speed up code you have to start with two things: Pay attention to the warnings that the MATLAB Editor gives you: Four lines have red squiggles underneath, hovering over them says "Variable appears … In the MATLAB Editor, there is a button "Run", if you click the bottom part it expands into a menu. The top options here is "Run and Time". …

This script takes about 1.7 s to run using MATLAB Online (R2019b). … This leads at times to unexpected behavior in MATLAB, where typically b=a, b(1)=0 does not not change a. …

Very nice code, it’s hard to find anything to comment on it. 3*10^8 is better written as 3e8 (IEEE float format), then MATLAB doesn’t need to do any computations, though I doubt this would ever be a significant …

Variable names It's common in MATLAB code to use single-letter variable names. I do this too. Try to use variable names that make the purpose of the variable clear. …

The MATLAB editor can indent for you, simply select the code and press Ctrl+I. Kudos for using ii rather than i! i is a constant in MATLAB, and it's considered bad practice to change its meaning. … You can, for example, read some of the functions that come with MATLAB. …

A named function is declared like this: function out = function_name(in) If it is written in a file of the same name, and the file is on the MATLAB path, then it is accessible from the base workspace …

As I've said before, loops are no longer slow in MATLAB, but often it's still possible to remove them ("vectorize the code") for a time gain. … Producing all possible combinations of two values can be accomplished with the bsxfun function in MATLAB. …

I always use the same set(h,'property',value) syntax, because I've been using MATLAB for so long, but do consider the new h.property=value syntax. I find it clearer. … I'm always annoyed at MATLAB using a full page for PDF output, instead of adjusting page size to the figure like it does for all other file formats. …

You should preallocate the cs cell array: [v,x] = find(diff(a)>1); %find "jumps" xx = [0 x length(a)]; cs = cell(length(a)+1,1); for ii = 1:length(xx)-1 cs{ii} = a(xx(ii)+1:xx(ii+1)); end Style …

When appending to the matrix in this preferred way, MATLAB actually extends the storage of the vector. … MATLAB has a function ismember that does just this: INDX46 = ismember(elec.label, list46); …