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.
>>>
>>>
>>
>
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