sapply

Bullseye ! thanks a lot Sundar

-----Original Message-----
From: Sundar Dorai-Raj [mailto:sdorairaj at gmail.com] 
Sent: 09 February 2009 00:31
To: glenn
Cc: r-help at r-project.org
Subject: Re: [R] sapply

I'm not sure what you really want, so perhaps a simple example would
help (i.e. what a sample of the input looks like and what the output
you need looks like). My guess would be

sapply(df, diff)

but again, I'm not sure.

--sundar

Newbie question sorry (have tried the help pages I promise)



I have a dataframe (date,stockprice) say and looking how I might get the
return of: dataframe (difference in days, change in stock price) using
sapply - I require a very simple function and don't really want to go down
the zoo and quant mod route



Regards



glenn


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