[R] Using PLYR to apply a custom function to a data frame

[ramoss]

Hello,

I am still struggling w/ the PLYR syntax.  I am trying to build a customized
function to detect outliers in a data frame based on the interquantile
method.  My data frame is called "ALL" &  I am trying to create two new
variables in my data frame:
upper=q3+ 1.5*(q3-q1)   & lower=q1-1.5*(q3-q1).  I already have variables q1
& q3.  How could I create the upper and lower variables using plyr so that
it applies to the whole dataframe.  Thank you for your help.



--
View this message in context: http://r.789695.n4.nabble.com/Using-PLYR-to-apply-a-custom-function-to-a-data-frame-tp4663897.html
Sent from the R help mailing list archive at Nabble.com.