Re: [R] Yahoo data download problem

From: SUMANTA BASAK <r_econometrics_at_yahoo.co.in>
Date: Fri 16 Jun 2006 - 21:10:31 EST


Hi Petr,

Thanks for the solution. But my problem is still there. I have 500 company names in a single column in an excel sheet of S&P 500 index. I need to call all those compnies in a 'for' loop and write that whole dataset into a text file. I've developed the following one, but the problem is getting all those company names in a vector.

h<-c("GE","MMM")
s<-matrix(0,3818,2)
for (i in 1:2)
{
s[,i]<-yahoo.get.hist.quote(instrument = h[i], destfile = paste(h[i], ".csv", sep = ""), start="1996-01-01",

                     end="2006-06-16", quote = c("Close"), adjusted = TRUE, download = TRUE, origin = "1970-01-01",
                     compression = "d")

write.csv(s,file="Z:/yahoo.out.csv")
}

Here i have taken only two compnies. But i want to fetch all the company names and put them in a vector so that i can call them in a 'for' loop. Please guide.

Thanks,
Sumanta Basak.

Petr Pikal <petr.pikal@precheza.cz> wrote: Hi

On 16 Jun 2006 at 8:52, SUMANTA BASAK wrote:

Date sent:       Fri, 16 Jun 2006 08:52:22 +0100 (BST)
From:            SUMANTA BASAK 
To:              R HELP ,
 r-sig-finance-request@stat.math.ethz.ch
Subject:         [R] Yahoo data download problem

> Hi all R-Experts,
>
> I'm facing one problem in yahoo data downloading. I'm suing Windows
> XP, R 2.2.0, and i'm using yahoo.get.hist.quote function to download
> data. I need 500 companies of S&P index daily 'closing price' data for
> last ten years. My questions are:
>
> 1) I have all the ticker names of S&P 500 companies in a .csv format.
> I'm reading those names in R and they are coming as data.frame object.
> How can i change this to a vector?

df<-data.frame(x=sample(letters,10))

 as.vector(df$x)
 [1] "g" "b" "p" "u" "r" "q" "j" "h" "o" "k"
>

HTH
Petr

>
> 2) How can i get all companies data downloaded using a simple "for"
> loop?
>
> I'm using the following function for a single stock data.
>
>
> library(gdata)
> s<-yahoo.get.hist.quote(instrument = "mo", destfile = paste("mo",
> ".csv", sep = ""), start="1996-01-01",
> end="2006-06-16", quote = c("Close"), adjusted =
> TRUE, download = TRUE, origin = "1970-01-01",
> compression = "d")
>
>
> Thanks,
> Sumanta Basak.
>
>
> ---------------------------------
>
>
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>
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Petr Pikal
petr.pikal@precheza.cz                                  


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