numofcell {HyetosMinute} | R Documentation |
The function numofcell
uses parameters α,ν,κ,φ of Bartlett-Lewis model in order to produce the number of cells per storm, the time windows within the cell origins are produced and the vector of parameters η.
numofcell(n,a,v,k,f)
n |
A positive integer that specifies the |
a |
A positive number that specifies the shape parameter α of gamma distribution. |
v |
A positive number that specifies the scale parameter ν of gamma distribution. |
k |
Constant κ=β/η. |
f |
Constant φ=γ/η. |
In the original version of the model (Bartlett-Lewis Rectangular Pulse Model), all model parameters are assumed constant. In the modified version (Random Parameter Bartlett-Lewis Rectangular Pulse Model), the parameter η is randomly varied from storm to storm with a gamma distribution with shape parameter α (argument a
) and scale parameter ν (argument v
). Subsequently, parameters β and γ also vary so that the ratios κ=β/η (argument k
) and φ=γ/η (argument f
) are constant.
NumofCells |
Number of cells per storm. |
TimeWindows |
Time windows containing cell arrivals. |
par.hta |
Parameter η of exponential distribution governing cell durations of each storm. See |
Kossieris Panagiotis pankoss@hotmail.com
http://itia.ntua.gr/el/docinfo/368/