polyJump2Quad: polyJump2Quad Simulate a polynomial trivariate relationship
In benkeser/haltmle.sim: Simulation study for HAL-TMLE

polyJump2Quad Simulate a polynomial trivariate relationship

1	polyJump2Quad(x1, x2, x3, x4, npoly, coef, deg1, deg4, jumpLoc2, jumpLoc3)

`x1`	A vector
`x2`	A vector
`x3`	A vector
`x4`	A vector
`npoly`	A numeric indicating the number of polynomial terms to simulate
`coef`	A vector indicating the coefficient for each polynomial term
`deg1`	A vector indicating the degree of the first polynomial term
`deg4`	A vector indicating the degree of the first polynomial term
`jumpLoc2`	Random quantile for x2 jump
`jumpLoc3`	Random quantile for x2 jump
`coef`	A numeric coefficient