You are only using dput to create a version of your data that you can post in your email along with your question. You do not use it in your analysis. You originally posted a table of your data that requires extra steps for us to convert into a useable form so I suggested you use dput in the future to create a version of the data that is easy for r-help subscribers to use in order to recreate your data. That makes it easier to answer your question.
---------------------------------------------- David L Carlson Associate Professor of Anthropology Texas A&M University College Station, TX 77843-4352 From: Elaine Kuo [mailto:elaine.kuo...@gmail.com] Sent: Monday, December 17, 2012 5:56 AM To: dcarl...@tamu.edu; r-help@r-project.org Subject: Re: [R] averaging X of specific Y (latitude) Another question (I am sure it is the last one tentatively): After creating a text.file using dput (let's name the created file "datam"), please kindly advise how to use the text file in writing the code using "structure" like below. Thank you. code dta <- structure(list(Species = structure(1:11, .Label = c("Butterfly A1", + "Butterfly A2", "Butterfly A3", "Butterfly A4", "Butterfly B1", + "Butterfly B2", "Butterfly B3", "Butterfly B4", "Butterfly B5", + "Butterfly C1", "Butterfly C2"), class = "factor"), Range = c(130.5, + 450.68, 1102.38, 893.34, 820.2, 872.2, 488.2, 620.11, 982.78, + 720.32, 912.2), Latitude = c(9.45, 10.2, 9.3, 16.4, 10.54, 10.87, + 16.79, 18.3, 12.98, 12.67, 18.07)), .Names = c("Species", "Range", + "Latitude"), class = "data.frame", row.names = c(NA, -11L))) Elaine On Mon, Dec 17, 2012 at 7:40 PM, Elaine Kuo <elaine.kuo...@gmail.com> wrote: One more question: Please kindly explain why it is written as "row.names = c(NA, -11L))." (in the code below) I am unsure why it is "negative" 11. Thank you . Elaine code dta <- structure(list(Species = structure(1:11, .Label = c("Butterfly A1", + "Butterfly A2", "Butterfly A3", "Butterfly A4", "Butterfly B1", + "Butterfly B2", "Butterfly B3", "Butterfly B4", "Butterfly B5", + "Butterfly C1", "Butterfly C2"), class = "factor"), Range = c(130.5, + 450.68, 1102.38, 893.34, 820.2, 872.2, 488.2, 620.11, 982.78, + 720.32, 912.2), Latitude = c(9.45, 10.2, 9.3, 16.4, 10.54, 10.87, + 16.79, 18.3, 12.98, 12.67, 18.07)), .Names = c("Species", "Range", + "Latitude"), class = "data.frame", row.names = c(NA, -11L))) >> >> >> ----- Original Message ----- >> From: David L Carlson <dcarl...@tamu.edu> >> To: 'Elaine Kuo' <elaine.kuo...@gmail.com>; r-help@r-project.org; >> 'r-sig-geo' <r-sig-...@stat.math.ethz.ch> >> Cc: >> Sent: Sunday, December 16, 2012 11:32 AM >> Subject: Re: [R] averaging X of specific Y (latitude) >> >> It is better to use dput() in R to create a text version of your data for >> us >> to work with. The aggregate command below gives you the mean ranges by >> butterfly species and latititude and saves the result as Bfly. The >> colnames() command simply renames the columns: >> >>> dta <- structure(list(Species = structure(1:11, .Label = c("Butterfly >> A1", >> >> + "Butterfly A2", "Butterfly A3", "Butterfly A4", "Butterfly B1", >> + "Butterfly B2", "Butterfly B3", "Butterfly B4", "Butterfly B5", >> + "Butterfly C1", "Butterfly C2"), class = "factor"), Range = c(130.5, >> + 450.68, 1102.38, 893.34, 820.2, 872.2, 488.2, 620.11, 982.78, >> + 720.32, 912.2), Latitude = c(9.45, 10.2, 9.3, 16.4, 10.54, 10.87, >> + 16.79, 18.3, 12.98, 12.67, 18.07)), .Names = c("Species", "Range", >> + "Latitude"), class = "data.frame", row.names = c(NA, -11L)) >>> Bfly <- aggregate(Range~Species+floor(Latitude), dta, mean) >>> colnames(Bfly) <- c("Species", "Latitude", "Mean") >>> Bfly >> Species Latitude Mean >> 1 Butterfly A1 9 130.50 >> 2 Butterfly A3 9 1102.38 >> 3 Butterfly A2 10 450.68 >> 4 Butterfly B1 10 820.20 >> 5 Butterfly B2 10 872.20 >> 6 Butterfly B5 12 982.78 >> 7 Butterfly C1 12 720.32 >> 8 Butterfly A4 16 893.34 >> 9 Butterfly B3 16 488.20 >> 10 Butterfly B4 18 620.11 >> 11 Butterfly C2 18 912.20 >> >> ---------------------------------------------- >> David L Carlson >> Associate Professor of Anthropology >> Texas A&M University >> College Station, TX 77843-4352 >> >>> -----Original Message----- >>> From: r-help-boun...@r-project.org [mailto:r-help-bounces@r- >>> project.org] On Behalf Of Elaine Kuo >>> Sent: Saturday, December 15, 2012 10:15 PM >>> To: r-help@r-project.org; r-sig-geo >>> Subject: [R] averaging X of specific Y (latitude) >>> >>> Hello >>> >>> >>> >>> I have a table describing butterfly range traits. >>> >>> It is composed of three columns as below >>> >>> >>> >>> Species name range size (X) latitude of range midpoint (Y) >>> >>> >>> >>> There are 11 kinds of butterflies. >>> >>> Each has its range size, and the latitude of each range midpoint ranges >>> from 9 to 19. >>> >>> I would like to have the average range size of every degree of >>> latitude. >>> >>> For example, the average range size of latitude degree 10 (10.0-10.99: >>> Butterfly A2, B1, B2) >>> >>> Please kindly help with R code to calculate the average values. >>> >>> Thank you. >>> >>> >>> Elaine >>> >>> >>> The details are as followed. >>> >>> >>> >>> Butterfly A1 130.5 9.45 >>> >>> Butterfly A2 450.68 10.2 >>> >>> Butterfly A3 1102.38 9.3 >>> >>> Butterfly A4 893.34 16.4 >>> >>> Butterfly B1 820.2 10.54 >>> >>> Butterfly B2 872.2 10.87 >>> >>> Butterfly B3 488.2 16.79 >>> >>> Butterfly B4 620.11 18.3 >>> >>> Butterfly B5 982.78 12.98 >>> >>> Butterfly C1 720.32 12.67 >>> >>> Butterfly C2 912.2 18.07 >>> >>> [[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. >> >> ______________________________________________ >> 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.
