Command Reference : Matrix Language Reference
  
 
@cifirst
Index of the first non-missing value in each column of a matrix.
Syntax: @cifirst(m)
m: matrix
Return: vector
Returns a vector containing the index (i.e, row number) of the first non-missing value of each column of the matrix m.
Examples
vector v1 = @cifirst(m1)
Cross-references
See also @cfirst.