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A simple logistic growth equation (in discrete time) is
N(t+1) = N(t) + (r * N(t) * (1-N(t)))
(as K is set to 1.0)
You can plot this by:
* Under 'Mode'
* set the 4th item to 'Seq'
* Set the 6th item to 'Sequential'
* Under 'Y='
* set the timestep: nMin = 1
* set the equation: u(n) = R * u(n-1) * (1-u(n-1))
* set the initial population density: u(nMin) = 0.1
* In normal mode set R by typing (the arrow appears by pressing STO>)
2.5->R
* Press GRAPH to view the graph
If you want K to be variable the logistic growth equation is
N(t+1) = N(t) + (r * N(t) * (1 - (N(t)/K) ) )
Go back to Richel Bilderbeek's Texas Code Snippets.
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