MINSERT(x;m;i;j) inserts matrix m into matrix x, putting the top-left element of m into row i and column j of x. Elements of m that are defined to lie outside x are ignored (so negative values of i and j are permitted). The setting for x or m may also be a variate (representing a single-column matrix) or a pointer of variates (specifying a matrix with a column for each variate in the pointer).