Thank you very much for your posts. I updated the example, which was taken
from the following:
http://cran.r-project.org/doc/contrib/Torfs+Brauer-Short-R-Intro.pdf
Hopefully the below is a bit more representative question, but unfortunately,
it looks like I'm not inputting the dates information properly to the order
information
In the way I'm currently inputting dates, order is not able to order the dates
properly.  Again I'm stumbling over subtleties of the R syntax. Again
thanks for any guidance, advice, references to addressing ordering dates
information.Â
Thanks again.Â
id<-c("ID1", "ID2", "ID3", "ID4")
info<-c("brick", "wood", "siding", "straw")
sqfootage<-c(1000, 2000, 3000, 2500)
lotsize<-c(0.25, 0.5, 0.75, 1.0)
data_test<-data.frame(id, dates, info, sqfootage, lotsize)
data_test_sorted<-data_test[order(data_test$dates),]
data_test_sorted
  id    dates  info sqfootage lotsize
2 ID2 1/16/2014  wood     2000   0.50
3 ID3 2/03/2013 siding     3000   0.75
1 ID1 2/16/2014 brick     1000   0.25
4 ID4 4/20/2014 straw     2500   1.00
dates
[1] "2/16/2014" "1/16/2014" "2/03/2013" "4/20/2014"
data_test
  id    dates  info sqfootage lotsize
1 ID1 2/16/2014 brick     1000   0.25
2 ID2 1/16/2014  wood     2000   0.50
3 ID3 2/03/2013 siding     3000   0.75
4 ID4 4/20/2014 straw     2500   1.00
Desire to order the dates information chronologically.
Thanks again for references to help me understand the proper details of the R
syntax (which I love!).Â
On Sunday, March 16, 2014 12:14 AM, Jeff Newmiller <jdnew...@dcn.davis.ca.us>
wrote:
It is not order that you are having difficulty with... it is name scope. Your
"z" is not a standalone variable, but a column in your "t" data frame.
Try
t[order(t$z), ]
Note that "t" is the name of a commonly-used function in R that transposes
matrices. It is generally not a good idea to reuse names like that, but it can
be puzzling to avoid when you are new. I type the name of the variable I want
to create alone on an interactive R console before I create it... if it tells
me that variable is not defined then I proceed.
You should also avoid posting HTML email to this list, as what we see is often
not what you see. Read the Posting Guide for more useful advice on using the
list.
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Jeff Newmiller            The  .....  Â
..... Go Live...
DCN:<jdnew...@dcn.davis.ca.us>    Basics: ##.#.   ##.#. Live
Go...
                   Live: OO#.. Dead:
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rocks...1k
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Sent from my phone. Please excuse my brevity.
te:
>Evidently, I'm overlooking something simple.� I'm trying to used order
>with data.frame. �
>
>
>For example:
>
>t = data.frame(x = c(11,12,14), y = c(19,20,21), z = c(10,9,7))
>t[order(z), ]
>Error in order(z) : object 'z' not found
>
>Thank you for any insights and advice provided.
>Â Â Â [[alternative HTML version deleted]]
>
>
>
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