Hallo, i have my matlab exam tomorrow, can anyone help me find the errors in the give Parameter. Thankyou

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Shrey Dhiman
Shrey Dhiman 2017-7-13
评论： Walter Roberson 2017-7-13
function y = f4(a)
v = [a;pi];
if v(2)>round(v(1))
y= v(1);
else
y=pi+v(3)
end

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回答（1 个）

Elias Gule
Elias Gule 2017-7-13
The error is in the line
y=pi+v(3)
You are essentially trying to retrieve the 3rd element of a 2-element array/vector. This will throw "Index exceeds matrix dimensions." exception. Note that the line
v = [a;pi];
initializes a 2 x 1 vector, v.
  1 个评论
Walter Roberson
Walter Roberson 2017-7-13
This might be what is happening in practice, but in the general case, if the function were called with a column vector as input, then the entire column vector would be put into v, followed by pi. So if it were called with (for example) [8.3; 7.9] then v(1) would become 8.3, v(2) would become 7.9, and v(3) would become pi, and there would then be no processing error.
Therefore possibly the problem is in not passing a large enough vector to the function.

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