interpolate {e1071} | R Documentation |
For each row in matrix x
, the hypercube of a
containing
this point is searched. The corners of the hypercube are
linearly interpolated. By default, dimnames(a)
is taken to
contain the coordinate values for each point in a
. This can be
overridden using adims
. If method=="constant"
, the value
of the ``lower left'' corner of the hypercube is returned.
interpolate(x, a, adims=lapply(dimnames(a), as.numeric), method="linear")
x |
Matrix of values at which interpolation shall take place. |
a |
Array of arbitrary dimension. |
adims |
List of the same structure as dimnames(a) . |
method |
Interpolation method, one of "linear" or {"constant"}. |
Friedrich Leisch
x <- seq(0,3,0.2) z <- outer(x,x, function(x,y) sin(x*y)) dimnames(z) <- list(x,x) sin(1.1*2.1) interpolate(c(1.1, 2.1),z)