From: Colby Tanner <ct_zero_at_yahoo.com>

Date: Fri 10 Feb 2006 - 15:44:23 EST

R-help@stat.math.ethz.ch mailing list

https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html Received on Fri Feb 10 20:07:57 2006

Date: Fri 10 Feb 2006 - 15:44:23 EST

hello,

is it possible to do something like splinefun(x,y), but with a 3rd
dim?

for example, if i have a 2-dim system like:
x<-1:100

y<-rexp(100,1)

func<-splinefun(x,sort(y))

func(n) # returns interpolated value of y (after sorting) given x=n

# i can check this by:

plot(x,sort(y))

lines(spline(x,sort(y)))

Can i do the same thing with an x,y, and z? i have found the akima interp(x,y,z) for building 3-d images, but nothing about the function aspect. besides building a nice 3-dim image, i would like to have a way of finding the interpolated z values if i give an x and y coordinate. something like func(x,y) in the above example.

thank you,

colby

R-help@stat.math.ethz.ch mailing list

https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html Received on Fri Feb 10 20:07:57 2006

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