| Function | Description | 
| add.image | Adds an image to an existing plot. | 
| arrow.plot | Adds arrows to a plot | 
| as.image | Creates image from irregular x,y,z | 
| as.surface | Creates an "surface" object from grid values. | 
| BD | Data frame of the effect of buffer compositions on DNA strand displacement amplification. A 4-d regression data set with with replication. This is a useful test data set for exercising function fitting methods. | 
| bplot | boxplot | 
| bplot.xy | Boxplots for conditional distribution | 
| colorbar.plot | Plots one or more color scale strips as a symbol | 
| cover.design | Computes Space-Filling "Coverage" designs using Swapping Algorithm | 
| exp.cov | Exponential, Gaussian and "power" covariance family | 
| exp.image.cov | Exponential,Gaussian, "power" and Matern covariance functions for 2-d gridded locations | 
| fields | fields - tools for spatial data | 
| flame | Response surface experiment ionizing a reagent | 
| gcv.Krig | Finds profile likelihood and GCV estimates of smoothing parameters | 
| grid | list Grid list for describing equally spaced grids | 
| image.count | Creates image for a 2-d histogram from irregular locations | 
| image.plot | Draws image plot with a legend strip for the color scale. | 
| image.smooth | Kernel smoother for irregular 2-d data | 
| interp.surface | Fast bilinear interpolator from a grid. | 
| Krig | Kriging surface estimate | 
| Krig.Amatrix | Smoother (or "hat") matrix relating predicted values to the dependent (Y) values. | 
| krig.image | Spatial process estimate for large irregular 2-d dats sets. | 
| lennon | Gray image of John Lennon. | 
| matern.cov | Matern covariance function | 
| minitri | Mini triathlon results | 
| ozone | Data set of ozone measurements at 20 Chicago monitoring stations. | 
| ozone2 | Daily 8-hour ozone averages for sites in the Midwest | 
| plot.Krig | Diagnostic and summary plots of the Krig object | 
| plot.sreg | Plots smoothing spline regression object | 
| plot.surface | Plots a surface | 
| plot.Wimage | Plots 2-d wavelet coefficents by level and type | 
| poisson.cov | Poisson spherical covariance function | 
| predict.Krig | Evaluation of Krig spatial process estimate. | 
| predict.se | Standard errors of predictions | 
| predict.se.Krig | Standard errors of predictions for Krig spatial process estimate | 
| predict.surface | Evaluates a fitted function as a surface object | 
| predict.surface.se | Standard errors of predictions | 
| print.Krig | Print kriging fit results. | 
| qsreg | Quantile or Robust spline regression | 
| rat.diet | Experiment studying an appetite supressant in rats. | 
| rdist | Euclidean distance matrix | 
| rdist.earth | Great circle distance matrix | 
| RMprecip | Monthly total precipitation (mm) for August 1963 in the Rocky Mountain Region | 
| set.panel | Specify a panel of plots | 
| sim.rf | Simulates a random field | 
| smooth.2d | Kernel smoother for irregular 2-d data | 
| splint | Cubic spline interpolation | 
| sreg | Smoothing spline regression | 
| stats | Calculate summary statistics | 
| stats.bin | Bins data and finds some summary statistics. | 
| summary.Krig | Summary for Krig spatial process estimate | 
| surface.Krig | Plots a surface and contours | 
| tim.colors | Tim's useful color table | 
| Tps | Thin plate spline regression | 
| transformx | Linear transformation | 
| US | Plot of the US with state boundaries | 
| US.dat | Outline of coterminous US and states. | 
| vgram | Finds a traditional or robust variogram for spatial data. | 
| vgram.matrix | Computes a variogram from an image | 
| Wimage.cov | Functions for W-transform based covariance models | 
| Wimage.info | Finds key indices related to a 2-d multiresolution | 
| Wimage.info.plot | Plot to check 2-d multiresolution indexing | 
| W.info | Gives indexing imfomration for a wavelet decompostion | 
| world | Plot of the world | 
| Wtransform | Quadratic W wavelet transform for 1-d vectors or rectangular or cylindrical images | 
| xline | Draw a vertical line | 
| yline | Draw horizontal lines |