Growth models
ivonbert
gompertz
richards
Usage
vonbert(linf, k, t0, age)
ivonbert(linf, k, t0, len)
gompertz(linf, a, k, age)
richards(linf, k, b, m, age)Examples
data(ple4)
vonbert
#> function(linf, k, t0, age) {
#> linf * (1.0 - exp((-k * (age - t0))))
#> }
#> <bytecode: 0x55fb46d6c560>
#> <environment: namespace:FLCore>
vonbert(linf=35, k=0.352, t0=-0.26, age=1:14)
#> [1] 12.53793 19.20287 23.89019 27.18669 29.50506 31.13552 32.28219 33.08862
#> [9] 33.65576 34.05462 34.33514 34.53241 34.67116 34.76873
ivonbert(35, 0.352, -0.26, 1:34)
#> [1] 0.00000000 0.00000000 0.00000000 0.08477516 0.17792807 0.27423929
#> [7] 0.37393054 0.47724771 0.58446456 0.69588704 0.81185861 0.93276661
#> [13] 1.05905002 1.19120916 1.32981758 1.47553717 1.62913723 1.79151908
#> [19] 1.96374812 2.14709619 2.34309867 2.55363268 2.78102674 3.02821815
#> [25] 3.29898571 3.59830535 3.93291625 4.31226680 4.75019486 5.26815383
#> [31] 5.90208438 6.71936299 7.87125250 9.84042063
gompertz(linf=179.13, k=0.4088, a=1.7268, age=1:12)
#> [1] 88.42865 134.22714 159.19676 170.69619 175.63304 177.69211 178.54079
#> [8] 178.88890 179.03140 179.08968 179.11352 179.12326
richards(linf=178.63, k=0.424, b=-7.185, m=2880.4, age=1:12)
#> [1] 42.82345 70.14526 96.88848 119.69588 137.45596 150.48243 159.66873
#> [8] 165.98206 170.24823 173.09932 174.99095 176.24005