Evaluate Multiple Conditions in Expression

I've been meaning to simplify my code by combining multiple conditions into one IF statement.

This is what I'm currently using :

if IntX < 1

ah.Color=[1, 1, 1];

xlabel(ax, ' ');

return;

end

if IntX > Inner(3)

ah.Color=[1, 1, 1];

xlabel(ax, ' ');

return;

end

if IntY < 1

ah.Color=[1, 1, 1];

xlabel(ax, ' ');

return;

end

if IntY > Inner(4)

ah.Color=[1, 1, 1];

xlabel(ax, ' ');

return;

end

This is not elegant but it works. I experimented with this statement but I get an error :

if (IntX < 1) && (IntX > Inner(3)) && (IntY < 1) && (IntY > Inner(4))

ah.Color=[1, 1, 1];

xlabel(ax, ' ');

return;

end

[Torsten]

Use || instead of &&

[Voss]

If either of IntX and IntY is a vector, you'll get an error using && or ||.

Answer 1

[the cyclist]

if (IntX < 1) | (IntX > Inner(3)) | (IntY < 1) | (IntY > Inner(4)) 
    ah.Color=[1, 1, 1];
    xlabel(ax, ' ');
    return;
end

You should also be able to use the short-circuit operator || instead of |.

[Roger Breton]

Works like a charm -- thank you!

I'm not sure I'm clear on the short-circuit operator : is that, as soon as one condition is false, the whole expression stops being evaluated?

[the cyclist]

You have the gist right, but in the short-circuited OR operation, it will evaluate from left-to-right until it finds a TRUE condition, because then it knows the entire expression is true.

See a fuller explanation in this section of the documentation.