> I would like to calculate elasticities and sensitivities of each parameters > involved in the following transition matrix: > > A <- matrix(c( > sigma*s0*f1, sigma*s0*f2, > s, v > ), nrow=2, byrow=TRUE,dimnames=list(stage,stage)) > > The command "eigen.analysis" avaliable in package "popbio" provides > sensibility matrix and elasticity matrix (same dimension than A). I would > like to know if there is a way to calculate separetely the elasticity of > sigma, s0, f1, f2, s and v ? >
If you want the eigenvalue second derivatives, check the secder and fullsecder functions in the demogR package (also elassens for partial derivatives of the eigenvalue elasticities). A description of that package is also found in the recent special issue of Ecology in R in Journal of Statistical Software. Chris ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
