Unstack vector into lower triangle of sym.
Syntax: @unvech(v)
v: vector
Return: sym
Creates a sym matrix with lower triangle filled using the unstacked elements of the vector v. The sym will be sized automatically. EViews will report a size mismatch if the number of elements of v does not correspond to a valid sym matrix size (is not a triangular number).
Note that @unvech is the inverse of the @vech function.
Examples
vector v1 = @mnrnd(15)
sym s1 = @unvech(v1)
creates a 15-element vector of normal random numbers V1 and unstacks it into a
sym matrix S1.
Cross-references
See also
@unvec,
@vec, and
@vech.