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

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

command

Answer 1

[Walter Roberson]

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');

Answer 2

[Azzi Abdelmalek]

x=[2 1 0 4 10 20 4 3  1]
[~,idx_first]=min(x)
[~,idx_last]=max(x)