For loop ranging from negative to positive integers?

For the code that is attached i need to run the code for values ranging from -12 to 20

Answer 1

[Adam]

Just create an array of e.g.

inputVals = -12:20;

Then use indices in your loop:

for i = 1:numel( inputVals )
  AOA(i) = inputVals( i );
  CL(i) = a*(AOA(i) - alp0);
  fprintf(fid,'%8.4f %8.4f\n',AOA(i),CL(i));
end

Also

doc zeros

gives details on how to create arrays of zeros. You cannot pass negative numbers to this as its inputs are sizes and a negative size makes no sense.

Answer 2

[Star Strider]

MATLAB indices must be integers greater than zero (or logical values).

Create your current ‘i’ vector to ‘iv’ (for example), then reference it in your code.

This works:

iv = -12:1:20;
AOA = zeros(size(iv));
CL = zeros(size(iv));
for i = 1:numel(iv)
    AOA(i) = iv(i);
    CL(i) = a*(AOA(i) - alp0);
    fprintf(fid,'%8.4f %8.4f\n',AOA(i),CL(i));
end