https://github.com/cran/ReacTran
Revision c455f23349da640f38c0a83c7127c199e7d95430 authored by Karline Soetaert on 19 July 2009, 00:00:00 UTC, committed by Gabor Csardi on 19 July 2009, 00:00:00 UTC
0 parent
Tip revision: c455f23349da640f38c0a83c7127c199e7d95430 authored by Karline Soetaert on 19 July 2009, 00:00:00 UTC
version 1.1
version 1.1
Tip revision: c455f23
properties.R
## =============================================================================
##
## Several useful properties to be used with setup.prop
##
## =============================================================================
## exponential decline
p.exp <- function(x, y.0=1, y.inf=0.5, x.L=0, x.att=1)
return(y.inf + (y.0-y.inf)*exp(-pmax(x-x.L,0)/x.att))
## linear decline
p.lin <- function(x, y.0=1, y.inf=0.5, x.L=0, x.att=1)
return(pmin(y.0,pmax(y.inf,y.0-(y.0-y.inf)*(x-x.L)/x.att)))
## sigmoid decline
p.sig <- function(x, y.0=1, y.inf=0.5, x.L=0, x.att=1)
return(y.inf + (y.0-y.inf)*exp(-(x-(x.L+0.5*x.att))/(0.25*x.att))/(1+exp(-(x-(x.L+0.5*x.att))/(0.25*x.att))))
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