https://github.com/cran/pracma
Tip revision: a7001ff1805634d18a10fa371b38dbe3e48f8c9e authored by HwB on 30 October 2011, 00:00:00 UTC
version 0.8.1
version 0.8.1
Tip revision: a7001ff
interp1.R
##
## i n t e r p 1 . R Test suite
##
interp1 <- pracma::interp1
x <- c(0.0, 0.5, 1.0, 1.5)
y <- x^2
xi <- c(0.25, 0.75, 1.25)
identical(interp1(x, y, xi, method="constant"), c(0.0, 0.25, 1.0))
identical(interp1(x, y, xi, method="linear"), c(0.125, 0.625, 1.625))
identical(interp1(x, y, xi, method="nearest"), c(0.25, 1.00, 2.25))
identical(interp1(x, y, xi, method="spline"), c(0.0625, 0.5625, 1.5625))
# Not yet implemented
# identical(interp1(x, y, xi, method="cubic"), c(0.0781, 0.5547, 1.5547))