Examples
DESTROY\MATRICES X[5:25:5] Y S[2]
will destroy all matrices; elements 5, 10, 15, 20, and
25 from vector X; the variable Y;
the second string from string array variable S. The variables
X and S will be compressed.
DESTROY X[WHERE((X>M)&(X<N))]
will delete from a vector all elements that have a value
between M and N, assuming that M and
N are scalars.