[R] How to deal with this :" object ' obs' not found.

[jim holtman]

You probably need to read a little more about R and learn the
difference between matrix and dataframes.  You need to do the
following since ttx1 is a matrix:

sortedx1=ttx1[order(-ttx1[, 'obs']),]

On Fri, Oct 2, 2009 at 9:37 PM, Hyo Lee <totemo13 at gmail.com> wrote:
> Ok. I just figured out what the problem was.
> I had to attach() the data.
>
> x1=data1[,,2]
> tx1=t(x1)
> ttx1 = cbind(tx1 , obs=1:nrow(tx1))
> --> this is how ttx1 was made; and of course, in ttx1, there is a variable
> called 'obs'.
>
> I had to attach(ttx1) first before I use this: sortedx1=ttx1[order(-obs),]
>
> But it seems that, I cannot attach ttx1.
>> attach(ttx1)
> Error in attach(ttx1) :
>   'attach' only works for lists, data frames and environments
>
> Of course, this is one of the ways I can do. But I just don't think I can do
> it for 1916 times.
>> write.csv(ttx1,"c:/i.csv")
>> m=read.table("c:/i.csv", header=T, sep=",")
>> attach(m)
>> sortedx1=m[order(-obs),]
> Do you know what I should do?
> Thanks.
>
> -Hyo
> On Fri, Oct 2, 2009 at 8:50 PM, jim holtman <jholtman at gmail.com> wrote:
>>
>> It is clear that 'obs' does not exist.
>>
>> On Fri, Oct 2, 2009 at 8:48 PM, Hyo Lee <totemo13 at gmail.com> wrote:
>> > It says...
>> >
>> >> str(obs)
>> > Error in str(obs) : object 'obs' not found
>> >> ls(obs)
>> > Error in try(name) : object 'obs' not found
>> > Error in as.environment(pos) : no item called "obs" on the search list
>> >
>> > On Fri, Oct 2, 2009 at 8:26 PM, jim holtman <jholtman at gmail.com> wrote:
>> >>
>> >> Are you really sure you have 'obs'?  What does 'str(obs)' show?  What
>> >> about 'ls()'?
>> >>
>> >> On Fri, Oct 2, 2009 at 8:19 PM, Hyo Lee <totemo13 at gmail.com> wrote:
>> >> > Hi guys,
>> >> > I need your help.
>> >> > I'm trying to sort the data by the variable "obs".
>> >> > This is how I tried to sort the data below.
>> >> >
>> >> > The problem is, I have a variable name "obs"; this is.. a counter
>> >> > variable.
>> >> > something like _n_ in SAS.
>> >> > I do not know why it is not working.
>> >> > I even tried a similar example in UCLA webpage:
>> >> > http://www.ats.ucla.edu/stat/R/faq/sort.htm  :it also does not seem
>> >> > to
>> >> > work.
>> >> > "*sort1.hsb2 <- hsb2[order(read) , ]"*
>> >> > Do you have any idea how to deal with this problem??  Thank you so
>> >> > much.
>> >> > -Hyo
>> >> >
>> >> >> colnames(ttx1)
>> >> >  [1] "longitude 1"  "longitude 2"  "longitude 3"  "longitude 4"
>> >> >  "longitude
>> >> > 5"
>> >> >  [6] "longitude 6"  "longitude 7"  "longitude 8"  "longitude 9"
>> >> >  "longitude
>> >> > 10"
>> >> > [11] "longitude 11" "longitude 12" "longitude 13" "longitude 14"
>> >> > "longitude
>> >> > 15"
>> >> > [16] "longitude 16" "longitude 17" "longitude 18" "longitude 19"
>> >> > "longitude
>> >> > 20"
>> >> > [21] "longitude 21" "longitude 22" "longitude 23" "longitude 24"
>> >> > "longitude
>> >> > 25"
>> >> > [26] "longitude 26" "longitude 27" "longitude 28" "longitude 29"
>> >> > "longitude
>> >> > 30"
>> >> > [31] "longitude 31" "longitude 32" "longitude 33" "longitude 34"
>> >> > "longitude
>> >> > 35"
>> >> > [36] "longitude 36" "longitude 37" "longitude 38" "longitude 39"
>> >> > "longitude
>> >> > 40"
>> >> > [41] "longitude 41" "longitude 42" "longitude 43" "longitude 44"
>> >> > "longitude
>> >> > 45"
>> >> > [46] "longitude 46" "longitude 47" "longitude 48" "longitude 49"
>> >> > "longitude
>> >> > 50"
>> >> > [51] "longitude 51" "longitude 52" "longitude 53" "longitude 54"
>> >> > "longitude
>> >> > 55"
>> >> > [56] "longitude 56" "longitude 57" "longitude 58" "longitude 59"
>> >> > "longitude
>> >> > 60"
>> >> > [61] "longitude 61" "longitude 62" "longitude 63" "longitude 64"
>> >> > "longitude
>> >> > 65"
>> >> > [66] "longitude 66" "longitude 67" "longitude 68" "longitude 69"
>> >> > "longitude
>> >> > 70"
>> >> > [71] "longitude 71" "longitude 72" "obs"
>> >> >>
>> >> >> sortedx1=ttx1[order(-obs),]
>> >> > Error in order(-obs) : object 'obs' not found
>> >> >
>> >> >        [[alternative HTML version deleted]]
>> >> >
>> >> > ______________________________________________
>> >> > R-help at 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.
>> >> >
>> >>
>> >>
>> >>
>> >> --
>> >> Jim Holtman
>> >> Cincinnati, OH
>> >> +1 513 646 9390
>> >>
>> >> What is the problem that you are trying to solve?
>> >
>> >
>>
>>
>>
>> --
>> Jim Holtman
>> Cincinnati, OH
>> +1 513 646 9390
>>
>> What is the problem that you are trying to solve?
>
>



-- 
Jim Holtman
Cincinnati, OH
+1 513 646 9390

What is the problem that you are trying to solve?