LightResponseCurveFitter_getPriorScale: LightResponseCurveFitter getPriorScale

Description Usage Arguments Details Value Author(s)

View source: R/LRC_base.R

Description

return the prior distribution of parameters

Usage

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LightResponseCurveFitter_getPriorScale(thetaPrior, 
    medianRelFluxUncertainty, nRec, ctrl)

Arguments

thetaPrior

numeric vector of location of priors

medianRelFluxUncertainty

numeric scalar: median across the relative uncertainty of the flux values, i.e. sdNEE / NEE

nRec

integer scalar: number of finite observations

ctrl

list of further controls, with entry isLasslopPriorsApplied

Details

The beta parameter is quite well defined. Hence use a prior with a standard deviation. The specific results are sometimes a bit sensitive to the uncertainty of the beta prior. This uncertainty is set corresponding to 20 times the median relative flux uncertainty. The prior is weighted n times the observations in the cost. Hence, overall it is using a weight of 1 / 20 of the weight of all observations.

However, its not well defined if PAR does not reach saturation. Need to check before applying this prior

Value

a numeric vector with prior estimates of the parameters

Author(s)

Department for Biogeochemical Integration at MPI-BGC, Jena, Germany <REddyProc-help@bgc-jena.mpg.de> [cph], Thomas Wutzler <twutz@bgc-jena.mpg.de> [aut, cre], Markus Reichstein <mreichstein@bgc-jena.mpg.de> [aut], Antje Maria Moffat <antje.moffat@bgc.mpg.de> [aut, trl], Olaf Menzer <omenzer@bgc-jena.mpg.de> [ctb], Mirco Migliavacca <mmiglia@bgc-jena.mpg.de> [aut], Kerstin Sickel <ksickel@bgc-jena.mpg.de> [ctb, trl], Ladislav Šigut <sigut.l@czechglobe.cz> [ctb]


REddyProc documentation built on March 18, 2020, 9:07 a.m.