[R] Odp: Operator > and <

Petr PIKAL petr.pikal at precheza.cz
Wed Jul 25 14:50:36 CEST 2007


you definitely shall make a quick glance to some documentation which comes 
with R e.g. R intro manual. Or look at CRAN where is quite impressive 
amount of literature from basic stuff to advanced papers.

To your question:

r-help-bounces at stat.math.ethz.ch napsal dne 25.07.2007 14:23:58:

> Hello, 
> I'am new to the R world and have a lot of question but the first is : 
How to
> deal with <> opertor in table objects? (Or how to deal with <> in
> general...) I explain my problem. 
> I read a file with the read.table expression. I then obtain a matrix. I 
> the first line for example with the commande data[,1]. Then I would like 

You did not select line but column. 

data[,1] > 2 

will give you logical vector which you can use for selection of rows from 

data[data[,1] > 2,]


> select only the element in this line that are greater than 2. Is there 
> elegant way to achieve that ?
> Thanks by advance...
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