Is there a compact way to check multiple variables against the same conditions?

I'm thinking about how to make some code I'm working on easier to read. For example, if I have something like the following:

if x != 0 && y != 0 && z != 0
  % stuff
end

Is there a way for me to turn that into something more compact, like:

if (x&y&z) != 0
  % stuff
end

Or do I just have to put up with this? This may not look like an ugly example, but there are some ugly lines I have which involve comparing a number of variables against the same set of parameters. I've considered setting up a function to which I can pass an array of variables and a set of conditions to check them against, but I'd prefer a syntax-related solution. Thanks in advance.

[Sean de Wolski]

in MATLAB, ~ is the negation not ! like in C.

Answer 1

[dpb]

If x, y, z are logical, then you can write the logical expression as above; if they're numeric and can hold anything but 0|1 then you have to do the explicit logic test to convert to a logical condition.

BTW, NB: if they're vectors or arrays, then be awfully careful of the && shortcircuit operators and remember that in Matlab an expression is TRUE iff

all(x)==true

Many a poster has wondered why their if clause doesn't seem to get executed owing to the latter.

Answer 2

[Sean de Wolski]

Frankly, I like the way you have it. It's clear to read:

if all([x(:); y(:); z(:)]) 
   %etc
end

would also work but is less readable.