Nothing
compPlot <- function( x, y, lim = NULL, ... ) {
xyRange <- range( x, y, na.rm = TRUE, finite = TRUE )
if( is.null( lim ) ) {
lim <- xyRange
} else {
if( length( lim ) != 2 ) {
stop( "argument 'lim' must be a vector of two elements" )
}
if( is.na( lim[1] ) ) {
lim[1] <- xyRange[1]
}
if( is.na( lim[2] ) ) {
lim[2] <- xyRange[2]
}
if( lim[1] >= lim[2] ) {
stop( "the first element of argument 'lim' must be smaller",
" than the second element" )
}
if( lim[1] > xyRange[1] | lim[2] < xyRange[2] ) {
warning( "some data points are outside the print area" )
}
}
# code taken from plot.default()
xlabel <- deparse(substitute(x))
ylabel <- deparse(substitute(y))
argList <- list( ... )
argList$x <- x
argList$y <- y
argList$xlim <- lim
argList$ylim <- lim
if( ! "xlab" %in% names (argList) ) {
argList$xlab <- xlabel
}
if( ! "ylab" %in% names (argList) ) {
argList$ylab <- ylabel
}
do.call( plot.default, argList )
abline( 0, 1 )
invisible( xyRange )
}
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