How can I compare frequency or amplitude of the given signal by matlab?

Let's say I have a signal A.

If the frequency of A is higher than B frequency then the matlab returns certain output.

I used "switch" to do this task, but it didn't work.

ex)

switch signalA
    case ((signalA>400)-(signalA>800))
        disp('1');
    case ((signalB>800)-(signalB>1200))
        disp('2');
    otherwise
        disp('none');
end

I know the code above is wrong because "signal A" doesn't show any values(frequency or amplitude).

so, How can I compare frequency or amplitude of the given 2 signals by matlab?

Answer 1

[KSSV]

Check this pseudo code:

for i = 1:10
    x = rand ; y = rand ;
    if x > y
        fprintf('x > y \n')
    else
        fprintf('x < y \n')
    end
end

[minsoo kim]

thx!