problem in vectorize script

Hi

I want to improve my script as:

a=round(50*rand(5,7)+50);  

for ii=1
    for jj=1
        if a(ii,jj)>=  60
            b1=2*a(ii,jj)

          else
              b2=-1*a(ii,jj)

          end

      end
  end    
      b=b1+b2;

to vetcorized. How can I do that?

Thanks a lot

Mani

[Jan]

for ii=1 runs the loop over one element only. Do you mean for ii=1:5 ?

Answer 1

[Rick Rosson]

a = round(50*rand(5,7)+50);  
b = 2*a;
b(a<60) = -a;

[Jan]

The right hand sige need to be masked also:

b(a<60) = -a(a<60);

Answer 2

[Jan]

Or as a one-liner:

b = a .* ((a >= 60) * 3 - 1);