h.vcoef

来自「强大的数学工具包」· VCOEF 代码 · 共 24 行

                               * * * * * * *
                               *   vcoef   *
                               * * * * * * *

        "vector coefficient"
        SYNTAX: X = vcoef(V, l)

        V is an expression whose value is a vector of length n.
        l is a positive integer, 0 < l <= n.

        X is assigned the l-th coefficient of V.


        Example 1: (correct)

                vcoef({NF(A),3,z^2-NF(A^3)}, 3)


        Example 2: (incorrect)

                vcoef({1,2,3}, 4)

_ERR_NR_058