SplomT: splom with title and time stamp

In cwhmisc: Miscellaneous Functions for Math, Plotting, Printing, Statistics, Strings, and Tools

Description

SplomT creates a scatterplot matrix with a: covariances (with script size proportional to size) in the upper triangle, b: histograms (with smoothing) and variable names in the diagonal, and c: scatterplot with smoothes in y and x direction in the lower triangle, stressing high correlations by nearly parallel lines. See figure in other documentation.

Usage

  SplomT(data,
        mainL = deparse(substitute(data)), xlabL = "", 
        hist = "h", adjust = 1,
        hist.col = trellis.par.get("strip.background")$col[5],
        cex.diag = 1,
        h.diag=0.4,
        colYonX = "red",
        colXonY = "blue", ...)

Arguments

hist.col	string, color of the histogram; like "(hash)ffccff"
data	Matrix or dataframe containing data, variables in columns
mainL	Label on top of scatterplot matrix or matrix of histograms
xlabL	Label for x-axis
hist	"h" = histogram, "d" = density curve, "b" = both
adjust	factor to adjust smoothing window for density curve
cex.diag	correction factor for font height of correlations and names in the diagonal
h.diag	placement of the variable name in the diagonal panel, =0 means on the lower border, = 0.5 in the middle between lower and upper border
colYonX, colXonY	colour of smoothing lines, y on x and x on y
...	Parameters passed on to upper.panel,lower.panel,diag.panel

Value

This function is called for its side effect to produce a plot.

Author(s)

Christian W. Hoffmann, [e-mail], with the assistance of Deepayan Sarkar [e-mail].

Examples

  nc <- 8 # number of columns 
  nr <- 250 # number of rows
  data <- as.data.frame(matrix(rnorm(nr*nc),nrow=nr,ncol=nc))
  data[,nc]   <- data[,nc-2] + 0.3*data[,nc-1] #generate higher correlations
  data[,nc-1] <- data[,nc-1] + 0.9*data[,nc]
  colnames(data)<-paste("vw",letters[1:nc],sep="")
  SplomT(data,mainL="",hist="d",cex.diag=0.6,hist.col="green")
  SplomT(data,mainL="",hist="b",adjust=0.4,cex.diag = 0.5)

Example output

Loading required package: lattice
Loading required package: grid

cwhmisc documentation built on May 1, 2019, 7:55 p.m.