getlogK | R Documentation |
This function can be applied to a list
or bdmData
object to provide a rough estimate of ln(K)
.
getlogK(object, ...)
## S3 method for class 'bdm'
getlogK(object, ...)
## S3 method for class 'list'
getlogK(object, r, interval, ...)
object |
either a |
... |
additional arguments to generic function |
r |
an assumed value for the intrinsic growth rate |
This function assumes a logistic production function and applies a grid search over ln(K) = (3, 30)
using a least-squares measure of fit. The value for intrinsic growth must be provided as an input and would usually be obtained through a call to rCalc
in the lhm package.
# get some data
data(albio)
dat <- bdmData(harvest = albio$catch, index = albio$cpue, time = rownames(albio))
# default model
mdl <- bdm()
# extract logK from
# bdm object
getlogK(mdl)
# extract with data
mdl@data <- dat
getlogK(mdl)
# calculate logK from
# catches and assumed r
getlogK(dat, r = exp(-1))
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