hexplom {hexbin}R Documentation

Scatter Plot Matrices

Description

Draw Conditional Scatter Plot Matrices and Parallel Coordinate Plots

Usage

hexplom(x, ...)

## S3 method for class 'formula':
hexplom(x,
             data = parent.frame(),
             auto.key = FALSE,
             aspect = 1,
             between = list(x = 0.5, y = 0.5),
             panel = panel.hexplom,
             prepanel = NULL,
             scales = list(),
             strip = TRUE,
             groups = NULL,
             xlab = "Scatter Plot Matrix",
             xlim,
             ylab = NULL,
             ylim,
             superpanel = "panel.pairs",
             pscales = 5,
             varnames,
             drop.unused.levels = lattice.getOption("drop.unused.levels"),
             ...,
             default.scales = list(draw = FALSE, relation = "same",axs = "i"),
             subset = TRUE)
## S3 method for class 'data.frame':
hexplom(x, data = NULL, ...)

Arguments

x The object on which method dispatch is carried out.
For the "formula" method, a formula describing the structure of the plot, which should be of the form ~ x | g1 * g2 * ..., where x is a data frame or matrix. Each of g1,g2,... must be either factors or shingles. The conditioning variables g1, g2, ... may be omitted.
For the data.frame methods, a data frame.
data For the formula methods, an optional data frame in which variables in the formula (as well as groups and subset, if any) are to be evaluated. By default, the environment where the function was called from is used.
aspect aspect ratio of each panel (and subpanel), square by default for hexplom.
between to avoid confusion between panels and subpanels, the default is to show the panels of a hexplom plot with space between them.
panel Usual interpretation for parallel, namely the function that creates the display within each panel.
For hexplom, the terminology is slightly complicated. The role played by the panel function in most other high-level functions is played here by the superpanel function, which is responsible for the display for each conditional data subset. panel is simply an argument to the default superpanel function panel.pairs, and is passed on to it unchanged. It is used there to create each pairwise display. See panel.pairs for more useful options.
superpanel function that sets up the hexplom display, by default as a scatterplot matrix.
pscales a numeric value or a list, meant to be a less functional substitute for the scales argument in xyplot etc. This argument is passed to the superpanel function, and is handled by the default superpanel function panel.pairs. The help page for the latter documents this argument in more detail.
varnames character vector giving the names of the p variables in x. By default, the column names of x.
auto.key, prepanel, scales, strip, groups, xlab, xlim, ylab, ylim, drop.unused.levels, default.scales, subset See xyplot
... Further arguments. See corresponding entry in xyplot for non-trivial details.

Details

hexplom produces pairwise Plot Matrices with hexagon bins. The role usually played by panel is taken over by superpanel, which determines how the columns of x are to be arranged for pairwise plots. The only available option currently is panel.pairs.

Many of the finer customizations usually done via arguments to high level function like xyplot are instead done by panel.pairs for hexplom. These include control of axis limits, tick locations and prepanel calcultions. If you are trying to fine-tune your hexplom plot, definitely look at the panel.pairs help page. The scales argument is usually not very useful in hexplom, and trying to change it may have undesired effects.

These and all other high level Trellis functions have several arguments in common. These are extensively documented only in the help page for xyplot, which should be consulted to learn more detailed usage.

Value

An object of class "trellis". The update method can be used to update components of the object and the print method (usually called by default) will plot it on an appropriate plotting device.

Author(s)

Deepayan Sarkar Deepayan.Sarkar@R-project.org, Nicholas Lewin-Koh nikko@hailmail.net

See Also

splom, xyplot, Lattice, panel.pairs

Examples

  ## Simple hexplom
  data(NHANES)
  hexplom(~NHANES[,7:14],xbins=15)
  ## With colors and conditioning
  hexplom(~NHANES[,9:13]|Sex,data=NHANES,xbins=15,colramp=magent)
  ## With custom panel function
  hexplom(~NHANES[,9:13],data=NHANES,xbins=20,colramp=BTY,
           superpanel=hppan<-function(z,...){
                        panel.pairs(z,upper.panel=panel.hexboxplot,...)})
  

[Package hexbin version 1.10.0 Index]