N-D sparse output arrays are not supported. Replication factors must be numeric. Complex replication factors are not supported. Replication factors must be nonnegative integer-valued scalars or vectors. In repelem(v, N), N must be a scalar or a vector of length equal to v. In repelem(A, N1, N2, ..., Nn), Nj must be a scalar or a vector of length size(A, j). With two inputs, the first argument must be a vector. Use three-input syntax for matrices.