[R] Number of words in a string

[Hans-Joerg Bibiko]

On 10 Apr 2008, at 07:43, Shubha Vishwanath Karanth wrote:
> So powerful, the gsub... But I really don’t understand the how the  
> regular expressions like " *\\S+$", need to be used and how to make  
> best use of it... Any article/material/links that I can go through?

A good starting point is: type

?regex

in your console.

Furthermore search in the net for "regular expression".

http://en.wikipedia.org/wiki/Regular_expression
http://en.wikipedia.org/wiki/Regular_expression_examples
http://www.regular-expressions.info/

There are some variants of regexp engine on the market but the core  
syntax should be the same.

Regards,

--Hans