51_solve_method: Solve Method
In kubik: Cubic Hermite Splines and Related Root Finding Methods

Description Usage Arguments Details Value References See Also Examples

Solve method, for CHS objects.

1 2	## S3 method for class 'CHS' solve(a, b=0, ..., to.list=FALSE)

`a`	A CHS object.
`b`	A vector of y values.
`to.list`	If true, return list. Ignored, if b has length two or greater.
`...`	Other arguments, for the roots.chs.eval function.

This function is a wrapper for roots.chs.eval.
(It calls roots.chs.eval with modified cy values).

It computes x values, where the spline's y value is equal to the values in b.

If to.list is false (the default), and length (b) is one:
It returns a single numeric vector.

Otherwise:
It returns a list of numeric vectors, one for each value in b.

Please refer to the help page for chs for background information and references.

chs, roots.chs

#control points
cx <- 1:4
cy <- c (-4, -1, 1, 4)

#cubic Hermite spline
#(with function object, and default slopes)
f <- chs (cx, cy)

#solve for x, given y=2
solve (f, 2)