dQspray function

Partial differentiation

Partial differentiation of a qspray polynomial.

dQspray(qspray, orders)

Arguments

• qspray: object of class qspray
• orders: integer vector, the orders of the differentiation; e.g. c(2, 0, 1) means that you differentiate two times with respect to $x$, you do not differentiate with respect to $y$, and you differentiate one time with respect to $z$

Returns

A qspray object.

Examples

library(qspray)
x <- qlone(1)
y <- qlone(2)
qspray <- x + 2*y  + 3*x*y
dQspray(qspray, c(1, 1))
derivQspray(derivQspray(qspray, 1), 2)