What does the "Lia" variable stand for in Matlab?

Question

For example, we see in the documentation for ismember:

[Lia,Locb] = ismember(A,B)

The Locb seems to stand for "location in B". What is the meaning of Lia? Could it be something like "line in A"?

Answer 1

Logical index to A.

From the documentation:

Lia — Logical index to A

vector | matrix | N-D array

Logical index to A, returned as a vector, matrix or N-D array containing 1 (true) wherever the values (or rows) in A are members of B. Elsewhere, it returns 0 (false).

Lia is an array of the same size as A, unless you specify the 'rows' flag.

If the 'rows' flag is specified or if A is a table, Lia is a column vector with the same number of rows as A.

Edit: See also: Logical Indexing in MATLAB