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@cobs

Number of non-NA values in each column of a matrix.

Syntax: @cobs(m)

m: matrix

Return: vector

Returns a vector containing the number of non-missing values in each column of the matrix m.

Examples

Let M1 be an

lower triangular matrix whose

elements above the main diagonal are NAs. In this case,

= @cobs(m1)

returns a column vector whose elements are the integers

, ..., 1.

Cross-references