在 R 中生成多个字符的(随机)序列 [英] Generating a (random) sequence of multiple characters in R

问题描述

1. 我可以使用

1. I can create a sequence of single letters using

LETTERS[seq( from = 1, to = 10 )]
letters[seq( from = 1, to = 10 )]

我可以使用 random 包创建一个不同长度的随机字符串

I can create a random string of various length, using the random package

library(random)
string <- randomStrings(n=10, len=5, digits=TRUE, upperalpha=TRUE,
                  loweralpha=TRUE, unique=TRUE, check=TRUE)

不幸的是，我不能使用 set.seed 函数，例如 2.

Unfortunately, I cannot use the set.seed function for example 2.

有没有办法在每次运行 R 文件时创建(唯一)字符串的相同(随机)组合?

Is there a way to create the same (random) combination of (unique) strings everytime one runs a R-file?

我的结果看起来像这样(每次运行该函数时结果都相同):

My result would look like this (with the same result everytime I run the function):

       V1     
  [1,] "k7QET"
  [2,] "CLlWm"
  [3,] "yPuwh"
  [4,] "JJqEX"
  [5,] "38soF"
  [6,] "xkozk"
  [7,] "uaiOW"
  [8,] "tZcrW"
  [9,] "8K4Cc"
 [10,] "RAhuU"

推荐答案

在一个文件中，比如 test.R，添加以下内容

In a file, say test.R, add the following

set.seed(1)
stringi::stri_rand_strings(10, 5)

然后每次都可以重现.

replicate(5, source("test.R", verbose = FALSE)$value)
#       [,1]    [,2]    [,3]    [,4]    [,5]    
#  [1,] "GNZuC" "GNZuC" "GNZuC" "GNZuC" "GNZuC" 
#  [2,] "twed3" "twed3" "twed3" "twed3" "twed3"
#  [3,] "CAgNl" "CAgNl" "CAgNl" "CAgNl" "CAgNl"
#  [4,] "UizNm" "UizNm" "UizNm" "UizNm" "UizNm" 
#  [5,] "vDe7G" "vDe7G" "vDe7G" "vDe7G" "vDe7G"
#  [6,] "N0NrL" "N0NrL" "N0NrL" "N0NrL" "N0NrL"
#  [7,] "TbUBp" "TbUBp" "TbUBp" "TbUBp" "TbUBp"
#  [8,] "fn6iP" "fn6iP" "fn6iP" "fn6iP" "fn6iP" 
#  [9,] "oemYW" "oemYW" "oemYW" "oemYW" "oemYW"
# [10,] "m1Tjg" "m1Tjg" "m1Tjg" "m1Tjg" "m1Tjg"

作为 source() 的替代方案，您可以在那里使用 parse().

As an alternative to source(), you could use parse() there.

replicate(5, eval(parse("test.R")))

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