Thread Subject: compare values with margin

Dear sirs,
I've to compare 2 values with a tolerance
something like this :

if a = b +-20
     do something
end

I don't know how to express this tolerance in matlab sintax

regards,
thanks to all in advance

"rubionelove " <rubionelove@gmail.com> wrote in message <h151s1$5nf$1@fred.mathworks.com>...
> Dear sirs,
> I've to compare 2 values with a tolerance
> something like this :
>
> if a = b +-20
> do something
> end
>
> I don't know how to express this tolerance in matlab sintax
>
> regards,
> thanks to all in advance

one of the solutions

     crit=abs(a-b)<20;
if any(crit) % in case A and/or B are vecs...
%
end

us

thank you us
have a nice day