I am a newbie in R. Now, I want to create a matrix, and then extract 20 random Numbers from each of these three uniform distributions: U(0.6,0.8), U(0.0001,0.0003), U(100,110), and place them in the first three columns of the matrix, with each column corresponding to a uniform distribution. Then 20 random Numbers are extracted from each of the two normal distributions: N(7750,0.01), N(12,0.4), and placed in the last two columns of the matrix. My program is as follows, but can only achieve uniform distribution of random numbers, cannot achieve the first three columns are uniform distribution, the last two columns are the normal distribution of random numbers, How can I change it?
input <-5 # variable input
xinput <- 20 #sampling number
range <- matrix(c(0.60,0.80,
0.0001,0.0003,
100,110,
7700,8000,
10,15,
),nrow=input,ncol=2,byrow=TRUE)
range
rangeresult <- matrix(0, nrow=xinput, ncol=input)# empty matrix for latter data
rangeresult
##uniform distribution
for (i in 1:input){
set.seed(456+i) # make results reproducible
rangeresult[,i] <- runif(xinput,range[i,1],range[i,2])
}
