using apply to a data frame

Thu, Apr 7, 2016 7:21 PM

As Bert pointed out your analsysis is incorrect. If `fract` is  function that takes a single vector then you should have gotten back a list or a matrix with as many entries or columns as the data5NonEventEpochs had columns.

So to do anything further, please post the output of dput(fract)

David.

> How can I apply a fuction to the columns of a data frame? (I
> can't covert data5NonEventsEpochs to a matrix as it contains character
> data).
> Thank you,
> John
> John David Sorkin M.D., Ph.D.
> Professor of Medicine
> Chief, Biostatistics and Informatics
> University of Maryland School of Medicine Division of Gerontology and
> Geriatric Medicine
> Baltimore VA Medical Center
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using apply to a data frame

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