find the same element within a vector in matlab

To find the index of an element in a vector which is same as a given value, you can use the find function in MATLAB.

Here's an example code block:

main.m
% Example vector
myVector = [1, 2, 3, 2, 4];

% Find the index of the element equal to 2
index = find(myVector == 2); % returns [2, 4]

% Find the index of the element equal to 5
index = find(myVector == 5); % returns []
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In the above example, find returns the indices of the elements in myVector which are equal to the given value. If no element is found, then an empty array is returned.