[R] Excel files

[Peter Dalgaard]

ramelan thiagarajah <ramelan3 at yahoo.co.uk> writes:

> Hi every one,
> 
> I am very very new to R and solicit your kind help
> 
> I am trying to use my excel files in R. I used the
> Xlread/write package and able to load the a sample
> file into console. Then I tried to find the mean of a
> column vector for example. But I could not proceed
> 
> Here is the problem
>  rfile <- "Trial1.xls"
> > read.xls( rfile, colNames = TRUE, sheet = 1, type =
> "data.frame", from = 1 )
>   x y  z
> 1 4 7  9
> 2 5 7 10
> 3 6 9 11
> 
> I request your help to find mean of column x 

First, assign your data frame to a variable:

Tr1 <- read.xls( rfile, colNames = TRUE, sheet = 1, 
                     type = "data.frame", from = 1 )

then 

mean(Tr1$x)

or

with(Tr1, mean(x))

or

attach(Tr1)
mean(x)

Did you study the "An Introduction to R" manual that ships with the
software? 

-- 
   O__  ---- Peter Dalgaard             Øster Farimagsgade 5, Entr.B
  c/ /'_ --- Dept. of Biostatistics     PO Box 2099, 1014 Cph. K
 (*) \(*) -- University of Copenhagen   Denmark          Ph:  (+45) 35327918
~~~~~~~~~~ - (p.dalgaard at biostat.ku.dk)                  FAX: (+45) 35327907