MATLAB: Simple Loop

errorforloop

Hi, I'm OK with Matlab usually but this has me stumped. When running the following simple script I get the error
Attempted to access a_b(15); index must be a positive integer or logical.
Error in test (line 10) a_b(i) = a_a;
Here is the code:
ts     = 0.01;         % Timestep (s)
a_b  = zeros(1,6001);
for t_a=0:ts:60
      a_a = t_a*7;
      i      = t_a*(1/ts)+1;                         % Step
      a_b(i) = a_a;
end
This is just the essentials of the loop that is causing the problem. Many thanks for any help in advance, Tom

Best Answer

ts     = 0.01;         % Timestep (s)
a_b  = zeros(1,6001);
i=1;
for t_a=0:ts:60
      a_a = t_a*7;
      %i      = t_a*(1/ts)+1;                         % Step
      a_b(i) = a_a;
      i=i+1;
end
plot(0:ts:60,a_b)
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