px: Numerical calculation of perpendicular detection function...
In david-borchers/LT2D: Line transect estimation in two dimensions

Description Usage Arguments Value Examples

Calculates the perpendicular detection function, p(x), for a given hazard.

1	px(x, b, hr, ystart, nint = 100)

`x`	scale or vector; perp. distance
`b`	two-element vector of hazard rate parameters, some of whihc may be logged
`hr`	hazard rate function
`ystart`	max forward distance at which could possibly detect animal (see details).
`nint`	number of intervals in numerical integration.

probability of detection at x

gridx=seq(0,1,length=50)
p.x=px(gridx,b=c(-0.2876821, -2.3025851),
 hr=h2,ystart=4,nint=100)
plot(gridx,p.x,type="l",ylim=c(0,max(p.x)),
xlab="prep. distance, x",ylab="p(x)")