[過去ﾛｸﾞ] 臨床統計もおもしろいですよ、その2 (1002ﾚｽ)
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896: 2020/01/31(金)15:00 ID:24QiZJ0Y(10/14) AAS
# SEIR MODEL
"
dS(t)/dt=-bS(t)I(t),
dE(t)/dt=bS(t)I(t)-aE(t) ,
dI(t)/dt=aE(t)-gI(t) ,
dR(t)/dt=gI(t)
a:発症率,b:感染率,g:回復率
"
remove (list = objects() )
graphics.off()

SEIR <- function(
# Parameters
contact_rate = 10, # number of contacts per day
transmission_probability = 0.07, # transmission probability
infectious_period = 5, # infectious period
latent_period = 2, # latent period
# Initial values for sub-populations.
s = 9990, # susceptible hosts
e = 9, # exposed hosts
i = 1, # infectious hosts
r = 0, # recovered hosts
# Output timepoints.
timepoints = seq (0, 100, by=0.5)
){

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上下前次1-新書関写板覧索設栞歴

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あと 106 ﾚｽあります
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