hudsonia {popbio} | R Documentation |
Projection matrices for the mountain golden heather (Hudsonia montana) for the years 1985 through 1988
data(hudsonia)
A list of 4 matrices from 1985-1988
A projection matrix with 6 size classes: seeds, seedlings, and 4 size classes divided by plant area.
Table 6.7 in Morris and Doak (2002). The original data is from Frost (1990).
Morris, W. F., and D. F. Doak. 2002. Quantitative conservation biology: Theory and practice of population viability analysis. Sinauer, Sunderland, Massachusetts, USA.
data(hudsonia) ## various ways to return lambda1 for each year sapply(hudsonia, function(x) eigen.analysis(x)$lambda1) #sapply(hudsonia, eigen.analysis)["lambda1",] #sapply(lapply(hudsonia, eigen.analysis), "[[", "lambda1") ## mean matrix x<-mean(hudsonia) image2(x, mar=c(1,4,4,1)) eigen.analysis(x)$lambda1