[R] grep

[Steven T. Yen]

Thanks Jeff. It works. If there is a good reference I should read 
(besides ? grep) I's be glad to have it.

On 7/11/2022 9:30 AM, Jeff Newmiller wrote:
> grep( "^(z|x)\\.", jj, value = TRUE )
>
> or
>
> grep( r"(^(z|x)\.)", jj, value = TRUE )
>
>
> On July 10, 2022 6:08:45 PM PDT, "Steven T. Yen" <styen using ntu.edu.tw> wrote:
>> Dear, Below, jj contains character strings starting with “z.” and “x.”. I want to grep all that contain either “z.” or “x.”. I had to grep “z.” and “x.” separately and then tack the result together. Is there a convenient grep option that would grep strings with either “z.” or “x.”. Thank you!
>>
>>> jj<-names(v$est); jj
>>   [1] "z.one"     "z.liberal" "z.conserv" "z.dem"     "z.rep" "z.realinc"
>>   [7] "x.one"     "x.liberal" "x.conserv" "x.dem"     "x.rep" "x.realinc"
>> [13] "mu1_1"     "mu2_1"     "rho"
>>> j1<-grep("z.",jj,value=TRUE); j1
>> [1] "z.one"     "z.liberal" "z.conserv" "z.dem"     "z.rep" "z.realinc"
>>> j2<-grep("x.",jj,value=TRUE); j2
>> [1] "x.one"     "x.liberal" "x.conserv" "x.dem"     "x.rep" "x.realinc"
>>> j<-c(j1,j2); j
>>   [1] "z.one"     "z.liberal" "z.conserv" "z.dem"     "z.rep" "z.realinc"
>>   [7] "x.one"     "x.liberal" "x.conserv" "x.dem"     "x.rep" "x.realinc"
>>
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