[R] ommoting rows

[Ben Tupper]

Hi,

On Sep 18, 2012, at 3:25 PM, Bert Gunter wrote:

> Please read An Introduction to R (or other R tutorial) to learn about
> indexing in R.
> 
> ?"[" or ?subset also will tell you how to do it, but they are rather terse.
> 


That's a great start, but it might be helpful to provide a bit more specificity when directing a newcomer like Jose to the Introduction to R.  Perhaps by providing a link to the relevant sections like this...

Here are nice descriptions of four different ways to index a vector:

http://cran.r-project.org/doc/manuals/R-intro.html#Index-vectors  

These kinds of indexing techniques can be applied to each dimension of an array-like object such as your example.  You can see in David Winsemius' nice example that he applied the "logical" type of indexing to the rows of your data.

Cheers,
Ben 




> -- Bert
> 
> On Tue, Sep 18, 2012 at 12:08 PM, Jose Narillos de Santos
> <narillosdesantos at gmail.com> wrote:
>> Hi I have an output data Data.csv
>> 
>> this style:
>> 
>> ,"V1","V2","V3"  1,"-9552","9552","C"  2,"0","9653","0"
>> 3,"9614","9614","V"  4,"0","9527","0"  5,"-9752","9752","C"
>> 6,"0","9883","0"  7,"0","9865","0"
>> I want to create a new matrix ommintg all the rows where third column has
>> 0.
>> 
>> There is a way to do it easyly?
>> 
>> Many thanks in advance.
>> 
>> My final matrix will have:
>> 
>> ,"V1","V2","V3"1,"-9552","9552","C"
>> 3,"9614","9614","V"5,"-9752","9752","C"
>> 
>>        [[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.
> 
> 
> 
> -- 
> 
> Bert Gunter
> Genentech Nonclinical Biostatistics
> 
> Internal Contact Info:
> Phone: 467-7374
> Website:
> http://pharmadevelopment.roche.com/index/pdb/pdb-functional-groups/pdb-biostatistics/pdb-ncb-home.htm
> 
> ______________________________________________
> 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.

Ben Tupper
Bigelow Laboratory for Ocean Sciences
180 McKown Point Rd. P.O. Box 475
West Boothbay Harbor, Maine   04575-0475 
http://www.bigelow.org