Logistic curve method

Logistic curve

The equation of the logistic curve is

P = Ps1+ mloge–1(nt)

where P = population at any time t from the origin A
Ps = saturated population
m = (Ps* Po)/Po (a constant)
n = kps (another constant)
Po = population at the start point of the curve.
k = constant

• If only three pairs of characteristic values Po, P1, P2 at time t = t0 = 0, t1and t2 = 2t1 extending over the useful range of the census population are chosen, then

Ps = 2PoP1P2 — P12(Po+P2)PoP2+P12

m = (Ps* Po)/Po

n =1t1loge [Po(Ps–P1)P1(Ps–Po)]