h2: Detection hazard function 'h2' prob(detect | available at...

In david-borchers/LT2D: Line transect estimation in two dimensions

Description

This hazard function has the form k(r,y)=a*sqrt(r^2-y^2)/r^(b+1); b>2 from Hayes and Buckland (1983) p37.

Usage

h2(y, x, b)

Arguments

y	Forward distance
x	perpendicular distance
b	parameter vector, where b[2] is log(theta)

Value

probability of detection given that an animal is availabe at location x,y

References

Hayes, R. J., and S. T. Buckland. "Radial-distance models for the line-transect method." Biometrics (1983): 29-42.

See Also

h1

Examples

h2(0.5,0.5,b=log(c(0.75,1)))

david-borchers/LT2D documentation built on Aug. 17, 2020, 1:37 a.m.