Disable MATLAB's implicit expansion

Question

Recently, in R2016b a feature was added to MATLAB, which is causing a lot of headaches in the school where I teach.

Nowadays formulae, which traditionally would be c

Answer 1

As mentioned by @PhelypeOleinik, this is (since R2016b) a core part of the language, and for good reasons, as detailed in the blog post referred to.

However, if you REALLY want to disable it...

1. Make a folder somewhere on your path, called @double.
2. In this folder, make a file plus.m.

In the file, put something like the following:

function out = plus(in1, in2)
    % do some things here
    out = builtin('plus', in1, in2)

Where I have a comment above, you can put whatever code you like: which could include code that checks the inputs for the "size-compatibility" rules you want, and errors if it doesn't meet them.

Do something similar for the functions minus, times, ldivide, rdivide, power, and other functions you want to modify.

PS please don't actually do this, the developers worked very hard to implement implicit expansion, and they'll cry if they see you disabling it like this...