Re: [R] Behavior of self-defined function within ddply

Hi, May be this helps: small - read.table(text=monthend_n ticker wgtdiff ret interval b1 b2 b3 b4 b5 b6 1 19990228 AA 0.7172 -2.58 0.33896 -0.5868 -0.24784 0.09112 0.43008 0.76904 1.108 2 19990228 AAPL -0.0828 -15.48 0.33896 -0.5868 -0.24784 0.09112 0.43008 0.76904 1.108 3 19990228 ABCW

[R] Behavior of self-defined function within ddply

I have a dataframe small whch has 5,000 rows and contains data for several tickers every month, as below: monthend_n ticker wgtdiff ret interval b1 b2 b3 b4 b5 b6 1 19990228 AA 0.7172 -2.58 0.33896 -0.5868 -0.24784 0.09112 0.43008 0.76904 1.108 2 19990228 AAPL -0.0828 -15.48 0.33896