Hi,
May be this might help you.
set.seed(1)
?a <-rlnorm(500,0.7,1)
?a1<-a[a>30|a<0.5]
set.seed(2)
a2 <-rlnorm(500,0.7,1)
a3<-a2[a2>30|a2<0.5]
a4<-a2[!a2%in%a3]
summary(a4)
#?? Min. 1st Qu.? Median??? Mean 3rd Qu.??? Max.
# 0.5105? 1.2500? 2.2990? 3.6850? 4.7140 25.3600
a[a%in%a1]<-sample(a4,length(a[a%in%a1]),replace=FALSE)
summary(a)
#?? Min. 1st Qu.? Median??? Mean 3rd Qu.??? Max.
# 0.5044? 1.2900? 2.1310? 3.5320? 4.1510 28.4800
?a[a>30|a<0.5]
#numeric(0)
A.K.
----- Original Message -----
From: Andras Farkas <motyocska at yahoo.com>
To: "r-help at r-project.org" <r-help at r-project.org>
Cc:
Sent: Saturday, September 1, 2012 5:29 AM
Subject: [R] help on setting boundaries for generating random numbers
Dear All,
?
is there a way to set low and high limits to a simulation with rlnorm()?
?
as an example:
?a <-rlnorm(500,0.7,1)
?
?
I get the summary of
?
Min. 1st Qu.? Median? ? Mean 3rd Qu.? ? Max.
0.1175? 1.0590? 2.1270? 3.4870? 4.0260 45.3800?
I would like to set limits so that the simulated values minimum would be greater then 0.5 and maximum of less than 30. If during simulation a value?outside of the limits would be simulated, then I would like R to "throw that value out" and go back to generate another random number instead that would fit the limits criteria.
?
Apreciate all the help on this,
?
Sincerely,
?
Andras
??? [[alternative HTML version deleted]]
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