muleMan {BIOdry} | R Documentation |
Multilevel dendroclimatic correlograms
Description
Multivariate correlograms between TRW fluctuations and climatic fluctuations.
Usage
muleMan(rd, cd, rd.var = NULL, cd.var = NULL, ...)
Arguments
rd |
|
cd |
|
rd.var |
|
cd.var |
|
... |
Further arguments in |
Details
Function mgram
in
package ecodist
is implemented to
compare the dendroclimatic fluctuations. Models
being compared should have common higher-level
factors (see example).
Value
data.frame
object of multivariate correlations.
Author(s)
Wilson Lara <wilarhen@gmail.com>, Felipe Bravo <fbravo@pvs.uva.es>
References
Lara W., F. Bravo, D. Maguire. 2013. Modeling patterns between drought and tree biomass growth from dendrochronological data: A multilevel approach. Agric. For. Meteorol., 178-179:140-151.
Examples
##TRW chronology (mm) and inside-bark radii
data(Pchron,envir = environment())
## Parameters of allometric model to compute Diameter at Breast
## Height over bark (DBH, cm) from diameter inside bark (dib, cm)
## and Total Tree Biomass (TTB, kg tree -1 ) from DBH (Lara
## et. al. 2013):
biom_param <- c(2.87, 0.85, 0.05, 2.5)
## Modeling tree-biomass fluctuations while accounting for
## within-plot source variability (see defaults in "modelFrame"
## function)
trwf <- modelFrame(Pchron,
to = 'cm',
MoreArgs = list(mp = c(2,1, biom_param)),
log.t = FALSE,
on.time = FALSE)
## Climatic Records:
data(Temp,envir = environment())
data(Prec,envir = environment())
## Aridity-index fluctuations:
aif <- modelFrame(rd = list(Prec, Temp),
fn = list('moveYr','wlai'),
lv = list('year','year'),
form = 'lmeForm')
##Multivariate comparison:
mcomp <- muleMan(trwf,
aif,
nperm = 10^3)
str(mcomp)