[R] Getting rate of return

Progressive Economist eclassic at hotmail.com
Wed Apr 30 07:26:49 CEST 2003

Dear R help.
I have a beginner's question to ask you. I faced a difficulty in getting 
rate of return for some target data.
I finished data importing and some manipulations. but I have any idea after 
Anyone who answer this question?

Thanks in advance

Park H.J

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