Difference between values and indices?

2017 10 5
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Can someone give an explanation of the difference between the values of elements in a matrix vs. the indices of elements in a matrix?
Thanks.

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Mischa Kim
Mischa Kim 2017-10-5
编辑：Mischa Kim 2017-10-5

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E.g.
A = [1 2; 3 4]
Values of/in A are 1,2,3,4. To access the 2 you would use
val = A(1,2)
(1,2) are the indices of the element of A whose value is 2.

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