View source: R/csbet.het.aSE.R
csbet.het.aSE | R Documentation |
The function calculates the between-group synchrony (a^) and standard error (SE) for heteroscedastic compound symmetry model (mHeCS).
csbet.het.aSE(model)
model |
a class " |
The function calculates between-group synchrony for heteroscedastic compound symmetry models (mHeCS).
The function returns a matrix
containing between-group synchrony and SE for each combination of varGroup
levels. This function is used internally in sync
.
Josu G. Alday, Tatiana A. Shestakova, Victor Resco de Dios, Jordi Voltas
Shestakova, T.A., Aguilera, M., Ferrio, J.P., Gutierrez, E. & Voltas, J. (2014). Unravelling spatiotemporal tree-ring signals in Mediterranean oaks: a variance-covariance modelling approach of carbon and oxygen isotope ratios. Tree Physiology 34: 819-838.
Shestakova, T.A., Gutierrez, E., Kirdyanov, A.V., Camarero, J.J., Genova, M., Knorre, A.A., Linares, J.C., Resco de Dios, V., Sanchez-Salguero, R. & Voltas, J. (2016). Forests synchronize their growth in contrasting Eurasian regions in response to climate warming. Proceedings of the National Academy of Sciences of the United States of America 113: 662-667.
sync
for a clear description of synchrony evaluation.
## Calculate between-group synchrony and SE ##for heteroscedastic compound symmetry model for conifersIP data: data(conifersIP) #Fit the heteroscedastic set of varcov models (mBE, mHeNE, mHeCS, mHeUN) # using taxonomic grouping criteria (ie. Species) ModHt <- dendro.varcov(TRW ~ Code, varTime = "Year", varGroup = "Species", data = conifersIP, homoscedastic = FALSE) #between-group synchrony and SE for each varGroup stratum combination # in heteroscedastic compound symmetry models. csbet.het.aSE(ModHt$mHeCS)
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