Speed to extract vector element by name with or without returning name: ["x"], [["x"]], [n] or unname()
The speed is higher using [[n]] then [["x"]]. unname(["x"]) is the slowest. > Growth alpha beta M S K x0 0.007984356 0.018129643 81.782205061 2.978223538 13.309442413 5.072000000 > system.time({for(i in 1:1E6) K <- Growth[[1]]}) user system elapsed 0.035 0.000 0.035 > system.time({for(i in 1:1E6) K <- Growth[["alpha"]]}) user system elapsed 0.083 0.002 0.086 > system.time({for(i in 1:1E6) K <- Growth[1]}) user system elapsed 0.145 0.004 0.150 > system.time({for(i in 1:1E6) K <- Growth["alpha"]}) user system elapsed 0.150 0.004 0.154 > system.time({for(i in 1:1E6) K <- unname(Growth[1])}) user system elapsed 1.122 0.007 1.135 > system.time({for(i in 1:1E6) K <- unname(Growth["alpha"])}) user system elapsed 1.144 0.011 1.158