expvgram {SpatialVx}

Exponential Variogram

Description

Calculates the empirical variogram for use with function spct.

Usage

expvgram(p, h, ...)

Arguments

p

numeric vector of length two giving the nugget and range parameter values, resp.

h

numeric vector of separation distances.

...

Not used.

Details

Simple function to work with spct to calculate the exponential variogram for given parameters and separation distances. The exponential variogram employed here is parameterized by

gamma(h) = sigma * ( 1 - exp( - h * theta ) )

where p is c( sigma, theta ).

Value

A numeric vector of variogram values for each separation distance in h.

Author(s)

Eric Gilleland

See Also

spct

Examples

# See help file for spct for examples.