Hi everyone, I have a two part population lab in my Ecology course. The first part was showing exponential and logistic growth. For the second section, I would like to introduce them to Leslie/Lefkovitch models. I'm able to multiply the matrix and the age classes step by step but I would like to have them run projections for as many generations as they choose and show the population structure by plotting the number in each age class over time.
I know software programs like Populus do this but I would like to have them (and myself) learn the programming. Here's what I have so far: #the data A <- c(0,0,100, 0.4,0,0, 0,0.7,0) #create a matrix from the data L <- matrix(A, nrow=3, byrow=T) #check out the matrix L #the starting population n_0 <- c(1000, 400, 100) #the next generation n_1 <- L %*% n_0 #check it out n_1 #run another generation n_2 <- L %*% n_1 #check it out n_2 Many thanks, Jeff -- ******************************************************** Jeffrey A. Stratford, PhD Department of Biology and Health Sciences Wilkes University, PA 18766 USA 570-332-2942 http://web.wilkes.edu/jeffrey.stratford/ ******************************************************** [[alternative HTML version deleted]] _______________________________________________ R-sig-ecology mailing list R-sig-ecology@r-project.org https://stat.ethz.ch/mailman/listinfo/r-sig-ecology
