thigmophobe: Find the direction away from the closest point

Description Usage Arguments Details Value Note Author(s) See Also Examples

Description

Find the direction away from the closest point

Usage

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 thigmophobe(x,y=NULL,names=seq_along(z),xlog=par("xlog"),ylog=par("ylog"),
  usr=par("usr"),pin=par("pin"),eps=.Machine$double.eps,pi=base::pi)

Arguments

x,y

Numeric data vectors. Typically the x/y coordinates of plotted points. If arrays are passed, they will be silently coerced to numeric vectors.

names

Names for the vector of directions.

xlog,ylog

Flags for logarithmic axes. See Note.

usr

The extent of the plot in user units.

pin

Extent of the plot in inches.

eps

smallest number that can be represented on the system.

pi

value of pi.

Details

thigmophobe returns the direction (as 1|2|3|4 - see pos= in text) away from the nearest point to each of the points described by x and y.

Value

A vector of directions away from the point nearest to each point.

Note

thigmophobe is typically used to get the offsets to automatically place labels on a scatterplot or similar using thigmophobe.labels to avoid overlapping labels. The name means "one who fears being touched".

The plot.span, xlog and ylog arguments were added to allow thigmophobe to be used outside of base graphics.

Author(s)

Bill Venables

See Also

thigmophobe.labels

Examples

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 x<-rnorm(10)
 y<-rnorm(10)
 thigmophobe(x,y)

Example output

 [1] 4 4 1 3 1 4 2 2 3 3

plotrix documentation built on Sept. 8, 2021, 5:08 p.m.