To get the index of an element in an array in MATLAB, you can use the find function. The find function returns the indices of all the elements of an array that satisfy a specified logical condition. Here's an example:
Suppose you have an array A = [2 5 6 4 8].
If you want to find the index of the element 6 in the array, you can use the find function as follows:
idx = find(A==6)
This will return the index(es) of all the element(s) that match the specified condition, in this case, the index of the element 6 in the array A. The output will be:
idx =
3
This means that the element 6 is located at the 3rd index of the array.
If the specified element is not in the array, then the find function will return an empty array. For example:
idx = find(A==10)
This will return an empty array [], since the element 10 is not found in the array A.