MATLAB: Help with if

Question

can you help me about this listing:

a=1:1:10; if (a<5) b=0; else b=1; end c=a*b; plot (a,c)

why b value is always 1? can you fix this list so the b value become 0 if a<5 and become 1 for another a?

Answer 1

if you put it in a for-loop it will do as you planned:

for a=1:1:10
  if a < 5
    b=0;
  else
    b=1;
  end
  c(a) = a * b;
  d(a) = a;
end
plot(d,c);