### How I would do it:
# container for the result
res <- NULL
# number of strings to be created
n <- 50
# random length of each string
v.length = sample( c( 2:4), n, rep = TRUE )
# letter sources
src.1 = LETTERS[ 1:10 ]
src.2 = LETTERS[ 11:20 ]
src.3 = "z"
src.4 = c( "1", "2" )
# turn into a list
src <- list( src.1, src.2, src.3, src.4 )
# use a loop
for( i in 1:n )
{
res[[i]] <- paste( sample( src[[ sample( 1:4, 1 ) ]], v.length[ i ], rep =
TRUE ), collapse = "" )
}
res <- unlist( res )
[1] "RLOK" "22" "CCA" "IEC" "zz" "111" "12" "zzz" "KOS" "12"
[11] "zzzz" "2212" "212" "HFG" "zzz" "11" "TRM" "FGBA" "zz" "LLLR"
[21] "211" "21" "SSKR" "BEDD" "NK" "LO" "221" "GDE" "MNOT" "zz"
[31] "DHD" "2222" "RMSS" "PSO" "111" "zz" "EFFF" "JAB" "BBB" "QQRN"
[41] "FDG" "zzzz" "zz" "CDE" "111" "zz" "zzz" "GAB" "zzz" "JGGD"
On Wednesday 15 January 2014 20:15:03 Burhan ul haq wrote:
> # Function to generate a string, given:
> # its length(passed as len)
> # and the source(passed as src)
> my.f = function(len,src)
> {
> tmp = sample(src,len,rep=FALSE)
> n1 = paste(tmp,collapse="")
> n1
> } # end
>
> # count
> n=50
>
> # length of names, a variable indicating string length
> v.length = sample(c(2,3,4),n,rep=TRUE)
>
> # letter sources
> src.1 = LETTERS[1:10]
> src.2 = LETTERS[11:20]
> src.3 = "z"
> src.4 = c("1","2")
>
> # Issue
> #s.ind = sample(c("src.1","src.2"),n,rep=TRUE)
> s.ind = sample(c(src.1,src.3,src.4),n,rep=TRUE)
>
> # Generate "n" strings, whose length is given by v.length, and randomly
> using sources (src1 to 4)
> unlist(lapply(v.length,my.f,s.ind))
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