# Interpolation Methods

## Documentation for package ‘interp’ version 1.1-5

- DESCRIPTION file.
- User guides, package vignettes and other documentation.

## Help Pages

interp-package | Interpolation of data
akima | Waveform Distortion Data for Bivariate Interpolation
akima474 | Sample data from Akima's Bicubic Spline Interpolation code (TOMS 474)
arcs | Extract a list of arcs from a triangulation object.
area | Extract a list of triangle areas from a triangulation object.
aSpline | Univariate Akima interpolation
aspline | Univariate Akima interpolation
bicubic | Bivariate Interpolation for Data on a Rectangular grid
bicubic.grid | Bicubic Interpolation for Data on a Rectangular grid
BiLinear | Bilinear Interpolation for Data on a Rectangular grid
bilinear | Bilinear Interpolation for Data on a Rectangular grid
BiLinear.grid | Bilinear Interpolation for Data on a Rectangular grid
bilinear.grid | Bilinear Interpolation for Data on a Rectangular grid
cells | extract info about voronoi cells
circles | plot circles
circtest | circtest / sample data
circtest2 | circtest / sample data
circum | Determine the circumcircle (and some other characteristics) of a triangle
circumcircle | Determine the circumcircle of a set of points
convex.hull | Return the convex hull of a triangulation object
ConvexHull | Return the convex hull of a triangulation object
franke | Test datasets from Franke for interpolation of scattered data
franke.data | Test datasets from Franke for interpolation of scattered data
franke.fn | Test datasets from Franke for interpolation of scattered data
identify.triSht | Identify points in a triangulation plot
in.convex.hull | Determines if points are on or in the convex hull of a triangulation object
interp | Interpolation function
interp2xyz | From interp() Result, Produce 3-column Matrix
interpp | Pointwise interpolate irregular gridded data
left | Determines if a point is on or left of the vector described by two other points.
locpoly | Local polynomial fit.
nearest.neighbours | Nearest neighbour structure for a data set
neighbours | List of neighbours from a triangulation or voronoi object
on | Determines if a point is on or left of the vector described by two other points.
on.convex.hull | Determines if points are on or in the convex hull of a triangulation object
outer.convhull | Version of outer which operates only in a convex hull
plot.triSht | Plot a triangulation object
plot.voronoi | Plot a voronoi object
plot.voronoi.polygons | plots an voronoi.polygons object
print.summary.triSht | Print a summary of a triangulation object
print.summary.voronoi | Print a summary of a voronoi object
print.triSht | Print a triangulation object
print.voronoi | Print a voronoi object
summary.triSht | Return a summary of a triangulation object
summary.voronoi | Return a summary of a voronoi object
tri.find | Locate a point in a triangulation
tri.mesh | Delaunay triangulation
triangles | Extract a list of triangles from a triangulation object
triSht | A triangulation object
triSht2tri | Converter to tripack objects
tritest | tritest / sample data
tritest2 | tritest / sample data
voronoi | Voronoi object
voronoi.area | Calculate area of Voronoi polygons
voronoi.findrejectsites | Find the Voronoi sites at the border of the region (to be rejected).
voronoi.mosaic | Voronoi mosaic
voronoi.polygons | extract polygons from a voronoi mosaic