What is your favourite MATLAB/Octave programming trick? [closed]

Answer 1

The colon operator for the manipulation of arrays.

@ScottieT812, mentions one: flattening an array, but there's all the other variants of selecting bits of an array:

x=rand(10,10);
flattened=x(:);
Acolumn=x(:,10);
Arow=x(10,:);

y=rand(100);
firstSix=y(1:6);
lastSix=y(end-5:end);
alternate=y(1:2:end);