Dear all, I am trying to write a function that can retrieve stock data via R from Yahoo finance as follows. This script is working both under my ubuntu and XP with gretl 1.9.12 cvs build date 2013-05-06. A problem occurred when I replace getSymbols("@sym",return.class="ts",from="@s1",to="2012-08-02") with getSymbols("@sym",return.class="ts",from="@s1",to="@s2") It seems that the second string replacement @s2 does not work. It cannot be recognized as a valid argument in R. Do anyone have an idea? Thanks Yi-Nung Yang <hansl> function list getsymbols(string sym[null],string s1[null], string s2[null]) foreign language=R library(quantmod) getSymbols("@sym",return.class="ts",from="@s1",to="2012-08-02") tmpM <- @sym gretl.export(tmpM) end foreign append &quot;(a)dotdir/tmpM.csv&quot; list tmplist= * return tmplist end function nulldata 9 string mys1="2012-07-22" setobs 5 @mys1 --time-series string mySym="MSFT" string mys1="2012-07-22" string mys2="2012-08-02" list xlist = getsymbols(mySym,mys1,mys1) </hansl>