scatter.hist: Draw a scatter plot with associated X and Y histograms,...

In frenchja/psych: Procedures for Psychological, Psychometric, and Personality Research

Description

Draw a X Y scatter plot with associated X and Y histograms with estimated densities. Partly a demonstration of the use of layout. Also includes lowess smooth or linear model slope, as well as correlation. Adapted from addicted to R example 78

Usage

scatter.hist(x,y=NULL,smooth=TRUE,ab=FALSE,correl=TRUE,density=TRUE,ellipse=TRUE,
  digits=2, method,cex.cor=1,title="Scatter plot + histograms",xlab=NULL,ylab=NULL,...)

Arguments

x	The X vector, or the first column of a data.frame or matrix.
y	The Y vector, of if X is a data.frame or matrix, the second column of X
smooth	if TRUE, then loess smooth it
ab	if TRUE, then show the best fitting linear fit
correl	TRUE: Show the correlation
density	TRUE: Show the estimated densities
ellipse	TRUE: draw 1 and 2 sigma ellipses and smooth
digits	How many digits to use if showing the correlation
method	Which method to use for correlation ("pearson","spearman","kendall") defaults to "pearson"
cex.cor	Adjustment for the size of the correlation
xlab	Label for the x axis
ylab	Label for the y axis
title	An optional title
...	Other parameters for graphics

Details

Just a straightforward application of layout and barplot, with some tricks taken from pairs.panels. The various options allow for correlation ellipses (1 and 2 sigma from the mean), lowess smooths, linear fits, density curves on the histograms, and the value of the correlation. ellipse = TRUE implies smooth = TRUE )

Note

Adapted from Addicted to R example 78

Author(s)

William Revelle

See Also

pairs.panels for multiple plots, multi.hist for multiple histograms.

Examples

data(sat.act)
with(sat.act,scatter.hist(SATV,SATQ))
#or for something a bit more splashy
scatter.hist(sat.act[5:6],pch=(19+sat.act$gender),col=c("blue","red")[sat.act$gender])

frenchja/psych documentation built on May 16, 2019, 2:49 p.m.