我是 r 的新手。我试图通过使用 for 循环使我的代码不那么复杂

Question

Here is my current code... can I make this a for loop?

#sample1, sample2, …, sample6 where samplei is sampling 10^(ith)
sample1 <- abs(rnorm(10)) #use abs because bellcurve is + and -
sample2 <- abs(rnorm(10^2))
sample3 <- abs(rnorm(10^3))
  sample <- abs(rnorm(10^4))
  sample5 <- abs(rnorm(10^5))
  sample6 <- abs(rnorm(10^6))

Answer 1

R is really good at vectorization, which means that almost any time you're trying to use a for loop, there's a better/faster way to do it. I would rewrite your sample as:

samples <- abs(rnorm(10^seq(6)))

Then each sample can be accessed as samples[1] etc.

Answer 2

If you also want to assign it to 6 different variables you will need to do:

n = 6
invisible(sapply(1:n, function(i) assign(x = paste("sample", i, sep = ""), 
                                         value = abs(rnorm(10^i)),
                                         envir = .GlobalEnv)))

Or with a for loop:

for(i in 1:n)
{
  assign(x = paste("sample", i, sep = ""), value = abs(rnorm(10^i)), envir = .GlobalEnv)
}

But it makes much more sense to store it as a list, like in:

samples = lapply(1:6, function(i) abs(rnorm(10^i)))