[R] simple subset question

Sun Dec 2 19:29:41 CET 2012

Hi,
I am getting this:
x<-subset(fish,Year==2012 & Total==max(Total))
 x
#   IDWeek  Total   Fry  Smolt  FryEq Year
#21     47 303259 34008 269248 491733 2012
A.K.

----- Original Message -----
From: Felipe Carrillo <mazatlanmexico at yahoo.com>
To: R. Michael Weylandt <michael.weylandt at gmail.com>
Cc: "r-help at r-project.org" <r-help at r-project.org>
Sent: Sunday, December 2, 2012 1:25 PM
Subject: Re: [R] simple subset question

Sorry, I was trying it to subset from a bigger dataset called 'winter' and forgot to change the variable names
when I asked the question. David W suggestion works but the strange part is that I am still getting an error message
with :
  x <- subset(fish,Year==2012 & Total==max(Total));x
I get:
[1] IDWeek Total  Fry    Smolt  FryEq  Year  
<0 rows> (or 0-length row.names)

I will start a fresh session to see if that helps...Thank you all

Felipe D. Carrillo
Supervisory Fishery Biologist
Department of the Interior
US Fish & Wildlife Service
California, USA
http://www.fws.gov/redbluff/rbdd_jsmp.aspx

From: R. Michael Weylandt <michael.weylandt at gmail.com>
>To: Felipe Carrillo <mazatlanmexico at yahoo.com> 
>Cc: "r-help at r-project.org" <r-help at r-project.org> 
>Sent: Sunday, December 2, 2012 9:42 AM
>Subject: Re: [R] simple subset question
>
>On Sun, Dec 2, 2012 at 5:21 PM, Felipe Carrillo
><mazatlanmexico at yahoo.com> wrote:
>>  Hi,
>> Consider the small dataset below, I want to subset by two variables in
>> one line but it wont work...it works though if I subset separately. I have
>> to be missing something obvious that I did not realize before while using subset..
>>
>> fish <- structure(list(IDWeek = c(27L, 28L, 29L, 30L, 31L, 32L, 33L,
>> 34L, 35L, 36L, 37L, 38L, 39L, 40L, 41L, 42L, 43L, 44L, 45L, 46L,
>> 47L, 48L, 49L, 50L, 51L, 52L, 27L, 28L, 29L, 30L, 31L, 32L, 33L,
>> 34L, 35L, 36L, 37L, 38L, 39L, 40L, 41L, 42L, 43L, 44L, 45L, 46L,
>> 47L, 48L, 49L, 50L, 51L, 52L), Total = c(0L, 0L, 326L, 1735L,
>> 1807L, 2208L, 3883L, 8820L, 6060L, 19326L, 63158L, 100718L, 53015L,
>> 91689L, 152629L, 122708L, 61293L, 15574L, 86538L, 75365L, 303259L,
>> 19691L, 0L, 0L, 0L, 0L, 0L, 0L, 0L, 0L, 161L, 321L, 1000L, 4425L,
>> 13202L, 19726L, 30518L, 84949L, 157260L, 145691L, 85801L, 62044L,
>> 44439L, 23272L, 22391L, 20159L, 14854L, 35379L, 31142L, 7736L,
>> 13221L, 4894L), Fry = c(0L, 0L, 326L, 1735L, 1807L, 2208L, 3883L,
>> 8759L, 6060L, 19326L, 63119L, 100524L, 52582L, 88170L, 145564L,
>> 111416L, 38233L, 5248L, 17826L, 11038L, 34008L, 215L, 0L, 0L,
>> 0L, 0L, 0L, 0L, 0L, 0L, 161L, 321L, 1000L, 4425L, 13055L, 19488L,
>> 30518L, 84818L, 156909L, 144786L, 84207L, 57720L, 31049L, 6858L,
>> 1616L, 719L, 364L, 49L, 0L, 0L, 0L, 0L), Smolt = c(0L, 0L, 0L,
>> 0L, 0L, 0L, 0L, 62L, 0L, 0L, 38L, 195L, 433L, 3518L, 7067L, 11290L,
>> 23058L, 10327L, 68712L, 64328L, 269248L, 19479L, 0L, 0L, 0L,
>> 0L, 0L, 0L, 0L, 0L, 0L, 0L, 0L, 0L, 147L, 238L, 0L, 131L, 351L,
>> 905L, 1592L, 4324L, 13391L, 16414L, 20774L, 19444L, 14491L, 35330L,
>> 31142L, 7736L, 13221L, 4894L), FryEq = c(0L, 0L, 326L, 1735L,
>> 1807L, 2208L, 3883L, 8864L, 6060L, 19326L, 63185L, 100854L, 53318L,
>> 94151L, 157576L, 130610L, 77432L, 22805L, 134639L, 120393L, 491733L,
>> 33327L, 0L, 0L, 0L, 0L, 0L, 0L, 0L, 0L, 161L, 321L, 1000L, 4425L,
>> 13306L, 19894L, 30518L, 85042L, 157506L, 146328L, 86914L, 65073L,
>> 53812L, 34763L, 36931L, 33769L, 24998L, 60110L, 52938L, 13149L,
>> 22476L, 8319L), Year = c(2012L, 2012L, 2012L, 2012L, 2012L, 2012L,
>> 2012L, 2012L, 2012L, 2012L, 2012L, 2012L, 2012L, 2012L, 2012L,
>> 2012L, 2012L, 2012L, 2012L, 2012L, 2012L, 2012L, 2012L, 2012L,
>> 2012L, 2012L, 2011L, 2011L, 2011L, 2011L, 2011L, 2011L, 2011L,
>> 2011L, 2011L, 2011L, 2011L, 2011L, 2011L, 2011L, 2011L, 2011L,
>> 2011L, 2011L, 2011L, 2011L, 2011L, 2011L, 2011L, 2011L, 2011L,
>> 2011L)), .Names = c("IDWeek", "Total", "Fry", "Smolt", "FryEq",
>> "Year"), row.names = c(NA, 52L), class = "data.frame")
>> fish
>> #  Subset to get the max Total for 2012
>>  x <- subset(winter,Year==2012 & Total==max(Total));b  # How come one line doesn't work?
>
>Works fine for me if I change "winter" to fish here.
>
>subset(fish,Year==2012 & Total==max(Total))
>  IDWeek  Total  Fry  Smolt  FryEq Year
>21    47 303259 34008 269248 491733 2012
>
>>
>>  # It works if I subset the year first and then get the Total max from it
>>  xx <- subset(winter,Year==2012)
>> xxx <- subset(xx,Total==max(Total));xxx
>> xxx
>>
>> Felipe D. Carrillo
>> Supervisory Fishery Biologist
>> Department of the Interior
>> US Fish & Wildlife Service
>> California, USA
>> http://www.fws.gov/redbluff/rbdd_jsmp.aspx
>>
>>        [[alternative HTML version deleted]]
>>
>>
>> ______________________________________________
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>> 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]]

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