Creating a function that identifies repeated items in a vector

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Sang Yeob Kim
Sang Yeob Kim 2014-12-4
编辑： Image Analyst 2014-12-5
I need help with creating this repeat function.
Write a function, repeat, that takes as input a vector of arbitrary length whose elements appear in random order. Determine whether the vector contains any repeated items. If it does, return true (1). Otherwise, return false(0). Test it in a program on the following vector: 11 22 33 44 55 66 77 99 11 102

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Mohammad Abouali
Mohammad Abouali 2014-12-4
编辑：Mohammad Abouali 2014-12-4
testVector=[11 22 33 44 55 66 77 99 11 102];
result=(numel(testVector)~=numel(unique(testVector)))
if testVector has repeated item results would be true; otherwise it would be false.
  2 个评论
Sang Yeob Kim
Sang Yeob Kim 2014-12-5
编辑：Image Analyst 2014-12-5
Based on your answer, I created the the function.
function repeat(v)
result=(numel(v)~=numel(unique(v)))
end
And I ran the program with the following:
>> w = [11 11 22 33 44]
w =
11 11 22 33 44
>> repeat(v)
result =
0
This should give out 1. I don't understand
Image Analyst
Image Analyst 2014-12-5
编辑：Image Analyst 2014-12-5
You forgot to pass anything back! You need to pass "result" back out:
function result = repeat(v)
result = (numel(v) ~= numel(unique(v)));
end
Please mark the Answer as accepted if that works.

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