Function to check whether an array contains a duplicate of elements

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Mina
Mina 2021-7-11
评论： Walter Roberson 2023-7-21
I want to write a function that
- Takes as input an array, the value being checked and the starting element of the array where checking for a duplicate should start
- Returns a logical value to indicate whether the array contains a duplicate of the value being checked (stops checking when one is found)

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dpb
dpb 2021-7-11
编辑：dpb 2021-7-12
function flag=isduplicate(x,v,ix)
flag=numel(find(x(ix:end)==v))>1;
end
x is vector or if x is array in linear addressing order.
Otherwise, need indexing expression of row, colum, ... for as many dimensions as are greater > 1 in size(x)
If x is floating point, then for robustness, consider ismembertol instead of exact equality or write a tolerance expression.
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