Matlab delete values

Hello,

I have a table: A=[2 5 5 0] and I use this function to sort it in descend order: [C, Index] = sort(A) and the result: C=[5 5 2 0]. Then I use this: t=A(Index(1)); A(A==t)=[]; to find and delete the value of table A which match the first value of table C. But when I have same values as in my example (5, 5) it deletes them both. I want to delete only one value each time. I mean I want A=[2 5 0] and so C become: C=[5 2 0]. What is the right function? I want this function to work for random arrays and not only for the example!

Thank you..

[Walter Roberson]

Note: to sort in descending order, you need

[C, Index] = sort(A,'descend');

Answer 1

[Matt Tearle]

Much as I love logical indexing, here's a case for using find with the number and 'first' or 'last' option:

idx = find(A==t,1,'first');
A(idx) = [];

That said, it seems like you're trying to remove the maximum (or minimum) value, but only one. In which case, why not simplify a bit:

idx = find(A==max(A),1,'first');
A(idx) = [];

Or even just use the fact that max will return a single index for the maximum value:

[~,idx] = max(A);
A(idx) = [];

[athpapa -]

thank you!!

Answer 2

[Matt Fig]

A(find(A==T,1,'first')) = [];

Or, you could just use Index directly:

A(Index(1)) = []

And avoid the call to FIND and/or any comparisons.

[athpapa -]

thank you!!