Thi is great! Thank you so much for taking the time to give is this hint.
 
mike


>________________________________
> From: Jeff Newmiller <jdnewmil@dcn.davis.CA.us>
>To:Mihai Nica <mihainica@yahoo.com>; Mihai Nica <mihainica@yahoo.com>; Jorge I Velez <jorgeivanvelez@gmail.com>; Katarzyna Kulma <katarzyna.kulma@gmail.com> 
>Cc: R mailing list <r-help@r-project.org> 
>Sent: Friday, May 3, 2013 8:16 AM
>Subject: Re: [R] R does not subset
> 
>
>This typically occurs because of sloppy manual data entry outside of R. To relieve further analysis pain, you can manually clean the data (usually only effective for one-time analyses) or use R to fix problems right after loading the data (there are multiple methods for doing this... I prefer using ?sub on character data before creating the factor).
>---------------------------------------------------------------------------
>Jeff Newmiller                        The     .....       .....  Go Live...
>DCN:<jdnewmil@dcn.davis.ca.us>        Basics: ##.#.       ##.#.  Live Go...
>                                      Live:  OO#.. Dead: OO#..  Playing
>Research Engineer (Solar/Batteries            O.O#.      #.O#.  with
>/Software/Embedded Controllers)              .OO#.      .OO#.  rocks...1k
>--------------------------------------------------------------------------- 
>Sent from my phone. Please excuse my brevity.
>
>Mihai Nica <mihainica@yahoo.com> wrote:
>
>>Hi:
>>
>>"(note the space after "Infected")"
>>
>>Since I lost a morning too with this issue, I am just curious, why is
>>there a space?�
>>
>>I know, it must be a dumb question, a reasonable programming rule, but
>>that's my level :-)
>>�
>>mike
>>
>>
>>>________________________________
>>> From: Jorge I Velez <jorgeivanvelez@gmail.com>
>>>To:Katarzyna Kulma <katarzyna.kulma@gmail.com> 
>>>Cc: R mailing list <r-help@r-project.org> 
>>>Sent: Friday, May 3, 2013 6:01 AM
>>>Subject: Re: [R] R does not subset
>>> 
>>>
>>>Hi Kasia,
>>>
>>>You need
>>>
>>>subset(REC2,� INFECTION=="Infected ")
>>>
>>>(note the space after "Infected").
>>>
>>>HTH,
>>>Jorge.-
>>>
>>>
>>>On Fri, May 3, 2013 at 7:48 PM, Katarzyna Kulma
>>><katarzyna.kulma@gmail.com>wrote:
>>>
>>>> Hi everyone,
>>>>
>>>> I know there have been several requests regarding subsetting before,
>>but
>>>> none of them really helps with my problem:
>>>>
>>>> I'm trying to subset only infected individuals from the REC2
>>data.frame:
>>>>
>>>> > str(REC2)
>>>> 'data.frame':� � 362 obs. of� 7 variables:
>>>>� $ RINGNO�  : Factor w/ 370 levels "BL17546","BL17577",..: 78 81 67
>>41 58
>>>> 66 17
>>>>� $ year� �  : Factor w/ 8 levels "Y2002","Y2003",..: 1 2 1 2 1 1 2 1
>>1 3
>>>> ...
>>>>� $ ccFLEDGE : int� 6 6 6 5 6 7 6 7 6 5 ...
>>>>� $ rec2012� : int� 2 1 2 2 1 2 1 1 1 0 ...
>>>>� $ binage� : Factor w/ 2 levels "ad","juv": 1 2 1 1 1 1 1 1 1 1 ...
>>>>� $ INFECTION: Factor w/ 2 levels "Infected ","Uninfected ": 2 1 2 1
>>2 2 1 2
>>>> 2 1 ...
>>>>� $ all.rsLD : num� -4.62 -6.19 -3.62 -4.19 -2.62 ...
>>>>
>>>> using either
>>>>
>>>> RECinf<-REC2[which (REC2$INFECTION=="Infected"),]
>>>>
>>>> or
>>>>
>>>> RECinf<-subset(REC2,� INFECTION=="Infected")
>>>>
>>>> in both cases I get empty data frame (0 observations):
>>>>
>>>> > str(RECinf)
>>>> 'data.frame':� � 0 obs. of� 7 variables:
>>>>� $ RINGNO�  : Factor w/ 370 levels "BL17546","BL17577",..:
>>>>� $ year� �  : Factor w/ 8 levels "Y2002","Y2003",..:
>>>>� $ ccFLEDGE : int
>>>>� $ rec2012� : int
>>>>� $ binage� : Factor w/ 2 levels "ad","juv":
>>>>� $ INFECTION: Factor w/ 2 levels "Infected ","Uninfected ":
>>>>� $ all.rsLD : num
>>>>
>>>> When subsetting, R doesn't return any warning or error message.
>>Besides, I
>>>> used same codes many times beforeand they worked perfectly well. Any
>>ideas
>>>> why this case is different?
>>>>
>>>> Thanks for your help,
>>>> Kasia
>>>>
>>>>� � � �  [[alternative HTML version deleted]]
>>>>
>>>> ______________________________________________
>>>> R-help@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.
>>>>
>>>
>>>��� [[alternative HTML version deleted]]
>>>
>>>______________________________________________
>>>R-help@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.
>>>
>>>
>>>
>>    [[alternative HTML version deleted]]
>>
>>
>>
>>------------------------------------------------------------------------
>>
>>______________________________________________
>>R-help@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.
>
>
>
>
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