[R] doubt about string comparison

[Charles C. Berry]

rk,

See

 	?sub

 	?regexp

Then try

 	sub( "-", "-dash-", "a-b" )
 	sub( "-.*", "", "a-b" )

Chuck

On Sat, 18 Aug 2007, ramakanth reddy wrote:

> I  have two large arrays of strings array1 with 180000 names and array2 with 24000 names ,I want to find the common names in both of them.
>
> My arrays are  for example
>
> Array1                                         Array2
>
> GAP4
> HIST1B-histamine....
>
> MFG12                                       SNRPD-signal induced...
>
> CFH1A                                       RNF-ribose nucleic...
>
> My
> array 2 ,has description of the abbreviation ,how can I remove the
> description part before using intersect command to match common names
> in array1 and array2.
> the description and abbreviation are separated by a hyphen --.
>
> I tried using matlab ,but due to the large file size it didnot work.
> Can you suggest me something to overcome this problem.
>
> Thank You
> rk
>
>
>
>
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Charles C. Berry                            (858) 534-2098
                                             Dept of Family/Preventive Medicine
E mailto:cberry at tajo.ucsd.edu	            UC San Diego
http://famprevmed.ucsd.edu/faculty/cberry/  La Jolla, San Diego 92093-0901