  We give an explicit raising operator formula for the modified Macdonald
polynomials $\tilde{H}_{\mu }(X;q,t)$, which follows from our recent formula
for $\nabla$ on an LLT polynomial and the Haglund-Haiman-Loehr formula
expressing modified Macdonald polynomials as sums of LLT polynomials. Our
method just as easily yields a formula for a family of symmetric functions
$\tilde{H}^{1,n}(X;q,t)$ that we call $1,n$-Macdonald polynomials, which reduce
to a scalar multiple of $\tilde{H}_{\mu}(X;q,t)$ when $n=1$. We conjecture that
the coefficients of $1,n$-Macdonald polynomials in terms of Schur functions
belong to $\mathbb{N}[q,t]$, generalizing Macdonald positivity.
