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For loop ranging from negative to positive integers?

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Austen Thomas
Austen Thomas 2018-1-19
回答： Star Strider 2018-1-19
For the code that is attached i need to run the code for values ranging from -12 to 20

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回答（2 个）

Adam
Adam 2018-1-19
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.
Star Strider
Star Strider 2018-1-19
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

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