Find the index value of first and last element in the vector ?

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Shah
Shah 2013-12-1
回答： Azzi Abdelmalek 2013-12-1
Find the index value of first and last element in the vector ?
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回答（2 个）

Walter Roberson
Walter Roberson 2013-12-1
index_of_first = 1;
index_of_last = length(YourVector);
If you mean an element with a particular value, then
index_of_first = find(YourVector == TheValue, 1, 'first');
index_of_last = find(YourVector == TheValue, 1, 'last');
Azzi Abdelmalek
Azzi Abdelmalek 2013-12-1
x=[2 1 0 4 10 20 4 3 1]
[~,idx_first]=min(x)
[~,idx_last]=max(x)

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