[R] Analysing Character Strings for subsequent frequency analysis

bob stoner bob.stoner at btinternet.com
Fri Dec 31 19:06:06 CET 2010


many thanks for your responses which have helped me to proceed. 
Sometimes doing your homework before asking can appear quite obvious but 
to newbies it is also quite difficult to get the correct question; 
therefore I appreciate your valued responses.
Happy New Year to you all

On 30/12/10 21:17, Gabor Grothendieck wrote:
> On Thu, Dec 30, 2010 at 1:03 PM, bob stoner<bob.stoner at btinternet.com>  wrote:
>> Hi
>> I'm trying to get to grips with R and establish R as a teaching medium in my
>> secondary school. I would like to use R to analyse text so I can produce
>> frequency analysis of the text for subsequent examination of ciphers. I can
>> produce code in VBA but I am struggling when writing in R to examine each
>> character. There must be a clear method using the vectorised format of R.
>> Furthermore, how do you substr a text string and reference each letter? I
>> can use nchar to see how many letters per string but not to select each
>> letter. I would prefer to remain in R and not deviate to Python etc as
>> getting R onto the school mainframe has been a long journey...
>> Many thanks
>> Bob Stoner
>> Sleaford, Lincolnshire, UK
> Google for:
>     CRAN Task View on Natural Language Processing
> for an overview of the addon packages for analyzing text.

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