Is this homework?
--
David.
On Oct 6, 2010, at 5:51 AM, Julia Lira wrote:
Dear all,
I need to do a loop in R, but I am not sure the software is
generating "n" times the variables I request differently. When I ask
to print the last matrix created, I just can see the loop for n=1.
To be more precise, supose I need to simulate 10 times one variable
and I want to fit the 10 variables simulated in a matrix. I dont
really know what I am doing wrong, but I just can see 1 variable
created.
Below follows an example of what I want:
rm(list=ls()) #remove almost everything in the memory
set.seed(180185)
#loop: create 10 times the variables (u1,u2,u3,u4,u5)
for (i in 1:10){
u1 <- c(runif(200,0,1))
u2 <- c(runif(200,0,1))
u3 <- c(runif(200,0,1))
u4 <- c(runif(200,0,1))
u5 <- c(runif(200,0,1))
u <- c(u1,u2,u3,u4,u5)
mu <- matrix(u, nrow=1000, ncol=1)
}
As you can see, when I print(mu), I just can see a matrix with the
vector u in one column. I also tried to increase the number of
columns to 10 (or i), but the matrix will have 10 times the same
vector. And what I need is like a Monte Carlo simulation, where I
have to simulate 10 times the variables above.
Am I doing something wrong?
Thanks in advance!
Julia
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David Winsemius, MD
West Hartford, CT
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and provide commented, minimal, self-contained, reproducible code.
