Matlab confirm is input is not an array

NT
2016 3 21
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更新时间：2016 3 21
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Confirm that the input is a positive integer and not an array. I got this far, but when I type in [1 2 3] is does not prompt to enter in the positive integer again.
n = input('Enter in a positive integer: ')
while (n<0) & (isvector(n))
n = input('Enter in a positive integer: ')
end

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Azzi Abdelmalek
Azzi Abdelmalek 2016-3-21
编辑：Azzi Abdelmalek 2016-3-21

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n = input('Enter in a positive integer: ')
while n<0 | numel(n)>1 | fix(n)~=n
n = input('Enter in a positive integer: ')
end

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Walter Roberson
Walter Roberson 2016-3-21
Test the number of elements first. "n<0" is false if you have a vector that contains a mix of negative and non-negative values.

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