scatterHist {psych} | R Documentation

## Draw a scatter plot with associated X and Y histograms, densities and correlation

### 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 with further modifications suggested by Jared Smith.

### Usage

    scatterHist(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,
       smoother=FALSE,nrpoints=0, xlab.hist=NULL,ylab.hist=NULL,grid=FALSE, xlim=NULL,
       ylim=NULL, x.breaks=11,y.breaks=11, x.space=0, y.space=0 ,freq=TRUE, x.axes=TRUE,
       y.axes=TRUE,...)

     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,smoother=FALSE, nrpoints=0, xlab.hist=NULL, ylab.hist=NULL,
     grid=FALSE, xlim=NULL,ylim=NULL,x.breaks=11,y.breaks=11,
     x.space=0,y.space=0,freq=TRUE,x.axes=TRUE,y.axes=TRUE,...)

### 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 add a loess smooth to the plot
`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"
`smoother` | if TRUE, use smoothScatter instead of plot. Nice for large N.
`nrpoints` | If using smoothScatter, show nrpoints as dots. Defaults to 0
`grid` | If TRUE, show a grid for the scatter plot.
`cex.cor` | Adjustment for the size of the correlation
`xlab` | Label for the x axis
`ylab` | Label for the y axis
`xlim` | Allow specification for limits of x axis, although this seems to just work for the scatter plots.
`ylim` | Allow specification for limits of y axis
`x.breaks` | Number of breaks to suggest to the x axis histogram.
`y.breaks` | Number of breaks to suggest to the y axis histogram.
`x.space` | space between bars
`y.space` | Space between y bars
`freq` | Show frequency counts, otherwise show density counts
`x.axes` | Show the x axis for the x histogram
`y.axes` | Show the y axis for the y histogram
`xlab.hist` | Not currently available
`ylab.hist` | Label for y axis histogram. Not currently available.
`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. The grid option provides a background grid to the scatterplot. )

### Note

Adapted from Addicted to R example 78. Modified following some nice suggestions from Jared Smith.

### 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],grid=TRUE)

[Package psych version 1.7.5 Index]