# approxExtrap

0th

Percentile

##### Linear Extrapolation

Works in conjunction with the approx function to do linear extrapolation. approx in R does not support extrapolation at all, and it is buggy in S-Plus 6.

Keywords
arith, dplot
##### Usage
approxExtrap(x, y, xout, method = "linear", n = 50, rule = 2, f = 0, ties = "ordered", na.rm = FALSE)
##### Arguments
x,y,xout,method,n,rule,f
see approx
ties
applies only to R. See approx
na.rm
set to TRUE to remove NAs in x and y before proceeding
##### Details

Duplicates in x (and corresponding y elements) are removed before using approx.

##### Value

a vector the same length as xout

approx
approxExtrap(1:3,1:3,xout=c(0,4))