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February 12, 2018 12:57
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ac_exam=function(n,p1_low,p1_high,p2_low,p2_high,study){ | |
#n:持っている科目数 | |
#p1_low:1次試験科目の合格率下限 | |
#p1_high:1次試験科目の合格率上限 | |
#p2_low:2次試験科目の合格率下限 | |
#p2_high: 2次試験科目の合格率上限 | |
#study:勉強により1科目だけ合格率を引き上げることができる | |
#year:受験年数 | |
#year1:1次試験合格年数 | |
#year2:2次試験合格年数 | |
year=0 | |
while(n<5){ | |
year=year+1 | |
k=rep(0,5) | |
t1=5-n | |
k[1]= rbinom(1, 1, runif(1,p1_low,p1_high)+study) | |
for(i in 2:t1){ | |
k[i]=rbinom(1, 1, runif(1,p1_low,p1_high)) | |
} | |
n=n+sum(k) | |
} | |
year1=year | |
while(n<7){ | |
year=year+1 | |
l=rep(0,2) | |
t2=7-n | |
l[1]= rbinom(1, 1, runif(1,p2_low,p2_high)+study) | |
for(j in 2:t2){ | |
l[j]=rbinom(1, 1, runif(1,p2_low,p2_high)) | |
} | |
n=n+sum(l) | |
} | |
year2=year | |
result=cbind(year1,year2) | |
return(result) | |
} | |
ac_exam(0,0.1,0.3,0.1,0.2,0.5) | |
#シミュレーションをN回行ってみる。 | |
sim=function(N,n,p1_low,p1_high,p2_low,p2_high,study){ | |
res=matrix(0,N,2) | |
for(i in 1:N){ | |
res[i,]=ac_exam (n,p1_low,p1_high,p2_low,p2_high,study) | |
} | |
return(res) | |
} | |
test_50=sim(10000,0,0.1,0.3,0.1,0.2,0.5) | |
test_10=sim(10000,0,0.1,0.3,0.1,0.2,0.1) |
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