thigmophobe {plotrix} | R Documentation |
Find the direction away from the closest point
Description
Find the direction away from the closest point
Usage
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
Examples
x<-rnorm(10)
y<-rnorm(10)
thigmophobe(x,y)