[R] Reading in and manipulating multiple data sets from the same input file

[Ista Zahn]

Hi,
I'm afraid it's not clear to me what you are trying to do. Can you
clarify what result you are trying to achieve?

Best,
Ista

On Fri, Mar 4, 2011 at 11:18 AM, mattnixon <m.r.nixon at ex.ac.uk> wrote:
> Hi,
>
> I am attempting to write code which will read in my data which is of this
> form:
>
> X1        Y1        X2       Y2        ....       Xn        Yn
> 0          0          0         0                    0          0
> 1          0          1         255                 1          0
> 2          255       2         0                    2          255
> 3          0          3         0                    3          0
> 4          0          4         0                    4          0
> 5          0          5         0                    5          255
> 6          125       6         125                 6         0
> 7          0          7         0                    7          0
> 8          0          8         0                    8          125
> .
> .
> .
>
> With n~100. My current code deals with only 1 data set, n~1 (below):
>
>
> profile<-read.table("datav1.txt",header=T)
> attach(profile)
>
> lines<-profile[Y>100,]
> d<-lines$X
> i<-1
> l<-1:1:i
>
> while(i<30){
> l[i]<-(d[(i+1)]-d[i])
> temp<-i+1
> i<-temp
> }
>
> L<-l[l>22]
>
>
> I want to extend this to accept n data sets to see how L varies between each
> data set. The way I have been trying to do this is as follows:
>
> profile<-read.table("datav2.txt",header=T)
> j<-1
> lines[j]<-profile[profile$Y[(2*j)]>100,]
>
> etc.
>
> However this returns the message "Error in profile$Y : object of type
> 'closure' is not subsettable". Does anybody know if there is any way I can
> read in a file containing many data sets and save each data set as an
> element of some matrix before performing the calculations (above) on it? Or
> some other method to achieve the same thing?
>
> Any help or suggestions would be great! Thank you.
>
>
>
>
>
> --
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> Sent from the R help mailing list archive at Nabble.com.
>
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>



-- 
Ista Zahn
Graduate student
University of Rochester
Department of Clinical and Social Psychology
http://yourpsyche.org