group.pdf {spatialEco}

Probability density plot by group

Description

Creates a probability density plot of y for each group of x

Usage

group.pdf(
  x,
  y,
  col = NULL,
  lty = NULL,
  lwd = NULL,
  lx = "topleft",
  ly = NULL,
  ...
)

Arguments

x

Numeric, character or factorial vector of grouping variable (must be same length as y)

y

Numeric vector (density variable)

col

Optional line colors (see par, col)

lty

Optional line types (see par, lty)

lwd

Optional line widths (see par, lwd)

lx

Position of legend (x coordinate or 'topright', 'topleft', 'bottomright', 'bottomleft')

ly

Position of legend (y coordinate)

...

Additional arguments passed to plot

Value

Plot of grouped PDF's

Author(s)

Jeffrey S. Evans <jeffrey_evans<at>tnc.org>

References

Simonoff, J. S. (1996). Smoothing Methods in Statistics. Springer-Verlag, New York.

Examples

y=dnorm(runif(100))
x=rep(c(1,2,3), length.out=length(y)) 
group.pdf(x=as.factor(x), y=y, main='Probability Density of y by group(x)', 
ylab='PDF', xlab='Y', lty=c(1,2,3))