Command Reference : Matrix Language Reference
  
 
@implode
Syntax: @implode(m)
Argument: square matrix, m
Return: sym
Forms a sym by copying the lower triangle of a square input matrix, m. Where possible, you should use a sym in place of a matrix to take advantage of computational efficiencies. Be sure you know what you are doing if the original matrix is not symmetric—this function does not check for symmetry. Example:
sym s2 = @implode(m1)
See also @explode.