[R] Getting rows from a dataframe

[Gavin Simpson]

Mark Lee wrote:

> Sorry if this is a silly question. I'm trying to extract all elements
> of a dataframe at a particular row. I can find no mention of this in
> any documentation and it may be naivety of dataframe on my part as I'm
> very green at this. Thankyou,
> 
> Mark
> 
> ______________________________________________
> R-help at stat.math.ethz.ch mailing list
> https://www.stat.math.ethz.ch/mailman/listinfo/r-help
> 
> 

dat <- data.frame(var1 = c(1:10), var2 = c(31:40), var3 = c(6:15))

dat[1, ] #extract 1st row

dat[1:4, ] #extract rows 1 through 4

dat[c(1,3,5,7,9), ] #extract named non-consecutive rows

dat[ ,1] # extract 1st column

... etc

It's in 'An Introduction to R' that should have come with your 
distribution, or in the manuals section of the r website:

http://www.r-project.org

HTH
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Gavin Simpson                     [T] +44 (0)20 7679 5522
ENSIS Research Fellow             [F] +44 (0)20 7679 7565
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