[R] Omitting a desired line from a table [Beginner Question]

[Jörg Groß]

sorry,
there is a comma missing;

> fish[fish$GeoArea == 1 & fish$Month == 10, ]


Am 25.01.2009 um 23:33 schrieb Jörg Groß:

>
> fish[fish$GeoArea == 1 & fish$Month == 10]
>
> Am 25.01.2009 um 23:06 schrieb pfc_ivan:
>
>>
>> I am a beginner using this R software and have a quick question.
>>
>> I added a file into the R called fish.txt using this line.
>>
>> fish<-read.table("fish.txt", head=T, fill=T)
>>
>> The .txt file looks like this. Since it contains like 300000 lines  
>> of data I
>> will copy/paste first 5 lines.
>>
>> Year GeoArea  SmpNo   Month
>> 1970	    1	         13	            7	
>> 1971	    1	         13	           10	
>> 1972	    1	         13	            8	
>> 1973	    2	         13	           10	
>> 1974	    1	         13	           11	
>>
>> Now what I want to do is to omit all the lines in the file that arent
>> happening in GeoArea 1, and that arent happening in Month 10. So  
>> basically
>> The only lines that I want to keep are the lines that have  
>> GeoArea=1 and
>> Month=10 at the same time. So if GeoArea=2 and Month=10 I dont need  
>> it. So i
>> just need the lines that have both of those values correct. How do  
>> I delete
>> the rest of the lines that I dont need?
>>
>> Thank you everyone.
>>
>>
>> -- 
>> View this message in context: http://www.nabble.com/Omitting-a-desired-line-from-a-table--Beginner-Question--tp21657416p21657416.html
>> Sent from the R help mailing list archive at Nabble.com.
>>
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>> and provide commented, minimal, self-contained, reproducible code.
>
> ______________________________________________
> R-help at r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.