You might consider a loop counter or two:
cnt1 = 0;
cnt2 = 0;
for a=1:5:101
cnt1 = cnt1 + 1;
for b=1:20
cnt2 = cnt2 + 1;
data1(cnt1,cnt2) = ...
end
end
Now you can use the counters where you want and the a and b where you want. The alternative is to set your loop variables to integers (say ii and jj), then index into pre-existing vectors a and b (created before the loop). Such as:
a = 1:5:101
b = b=1:20
for ii = 1:length(a)
for jj = 1:length(b)
data1(ii,jj) = ... % Now index into a and b. a(ii),b(jj)
end
end
Note that it doesn't really make much sense to index into your loop variables (a and b) as you had it since they are scalar.
