row=30;
c=1:10;

E= fix(rand(row,length(c))*100);


for i=1:length(c)    //i used this loop to do an example..
in(i)=fix(abs(rand(1)*10));
if !in(i)
    in(i)=1;
  endif
endfor

I want to SPEED it the loop (for hh=1:length(in) ,   for gg=in(hh):row )
for hh=1:length(in)
  maxRel=-999999999999999999;
  minRel=9999999999999999999;
  rangeRel=0;
  for gg=in(hh):row
                 v1=E(gg,hh)>maxRel;
                 maxRel=max(E(gg,hh),maxRel);
                 minRel=!v1*minRel+v1*9999999999999999999999;

                 minRel=min(E(gg,hh),minRel);
                 diff=maxRel-minRel;
                 rangeRel=max(diff,rangeRel);
endfor
 Range(hh)=rangeRel;
endfor