[R] newbie help: simple operations in R

[Simon Pickett]

you could use a loop but maybe easier would be
x<-c(NA,x)
y<-c(y,NA)
t<-x*y

use write.table() to write the table to your hard drive

e.g.

write.table(t, file="C:/Documents and Settings/simonp/My Documents/RELU/GIS 
data/Land Cover Map working/squares plus adjoining parcels/Scotland/scotland 
adj squares.csv", sep = ",",row.names = F)

HTH, Si.

----- Original Message ----- 
From: "Carletto Rossi" <nuovodna at gmail.com>
To: <r-help at r-project.org>
Sent: Tuesday, June 02, 2009 11:22 AM
Subject: [R] newbie help: simple operations in R


> Hi, i' d like to use R for simple calculations. I show you an examples to
> make clear my help request
>
> I' ve a file .csv like this (my real file is composed by 10.000 lines and 
> 8
> columns)
>
> x y
> 3 4
> 1 7
>
> I' ve imported in R correctly. Now i want create a new variable named "t"
> and t is defined throught this relation:
>
> t = 4 (second element on x column) * 4 (first element on y column)
>
> in what way can i calculate t and print its value on an external file or,
> better, append t values as a column on my original csv???
>
> Thanks
>
> Emanuele
>
> [[alternative HTML version deleted]]
>
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