R function where output is usable outwith the function

Question

So I would like to create a matrix of data in R using a function which I call setupdata. Basically getSymbols get stock data for the given symbols but from a loooong time. I wish to select the latest 60 trading days and therefore has design the following code.

getSymbols(c("GOOG","RBS.L","AAPL","FB"),src="yahoo")

setupdata<- function (x){
data2<-x[(dim(x)[1]-59):dim(x)[1],1:6]
print(data2)
}

setupdata(AAPL)

My problem is that i would like to be able to use "data2" without needing to call the function anymore after running it once. What am i missing out?

If you want to try it for yourself you might need the quantmod library

install.packages("quantmod")
library("quantmod")

Paul Hiemstra · Accepted Answer · 2014-03-20 12:57:28Z

2

You can simply return data2 from the function:

setupdata<- function (x){
    data2 <- x[(dim(x)[1]-59):dim(x)[1],1:6]
    return(data2)
}

data2_outside_function = setupdata(AAPL)

answered Mar 20, 2014 at 12:57

Paul Hiemstra

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1 Comment

shadow Over a year ago

The return statement isn't actually needed. You just have to assign the value of setupdata(AAPL) to some object, so you can reuse it.

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