[R] String manipulation

[jim holtman]

Just add '.' to the pattern specifier:

> MyString <- "ABCFR34564IJVEOJC3434.16ABC123.456KJHLKJH23452345AAA"
> # translate to the pattern sequences
> x <- chartr('ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789.'
+           , '0000000000000000000000000011111111111'
+           , MyString
+           )
> x.rle <- rle(strsplit(x, '')[[1]])  # determine the runs
> # create extraction matrix
> x.ext <- cbind(cumsum(c(1, head(x.rle$lengths, -1)))
+                     , cumsum(x.rle$lengths)
+                     )
> substring(MyString, x.ext[,1], x.ext[,2])
[1] "ABCFR"    "34564"    "IJVEOJC"  "3434.16"  "ABC"      "123.456"
"KJHLKJH"  "23452345" "AAA"
>


On Sun, Feb 13, 2011 at 2:07 PM, jim holtman <jholtman at gmail.com> wrote:
> If you have an indeterminate number of the patterns in the string, try
> the following:
>
>> MyString <- "ABCFR34564IJVEOJC3434"
>> # translate to the pattern sequences
>> x <- chartr('ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789'
> +           , '000000000000000000000000001111111111'
> +           , MyString
> +           )
>> x.rle <- rle(strsplit(x, '')[[1]])  # determine the runs
>> # create extraction matrix
>> x.ext <- cbind(cumsum(c(1, head(x.rle$lengths, -1)))
> +                     , cumsum(x.rle$lengths)
> +                     )
>> substring(MyString, x.ext[,1], x.ext[,2])
> [1] "ABCFR"   "34564"   "IJVEOJC" "3434"
>>
>
>
> On Sun, Feb 13, 2011 at 10:27 AM, Megh Dal <megh700004 at gmail.com> wrote:
>> Please consider following string:
>>
>> MyString <- "ABCFR34564IJVEOJC3434"
>>
>> Here you see that, there are 4 groups in above string. 1st and 3rd groups
>> are for english letters and 2nd and 4th for numeric. Given a string, how can
>> I separate out those 4 groups?
>>
>> Thanks for your time
>>
>>        [[alternative HTML version deleted]]
>>
>> ______________________________________________
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>> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
>> and provide commented, minimal, self-contained, reproducible code.
>>
>
>
>
> --
> Jim Holtman
> Data Munger Guru
>
> What is the problem that you are trying to solve?
>



-- 
Jim Holtman
Data Munger Guru

What is the problem that you are trying to solve?