Command Reference : Function Reference : Function Reference: C
  
 
@cfirst
First non-missing value in each column of a matrix object.
Syntax: @cfirst(m)
m: matrix
Return: vector
Returns a vector containing the first non-missing value from 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,
= @cfirst(m1)
returns the main diagonal of M1 as a column vector.
Cross-references
See also @clast, @cifirst, and @cilast.
See also @first, @last, @ifirst, and @ilast.