x^(1/n)  # ?
exp(log(x)/n) # ?

Either of those could be rolled into a function with the desired name:

On Mar 19, 2009, at 11:21 AM, Martin Biuw wrote:

Hi,
Is there a function in R to calculate the nth root, similar to the
MATLAB function NTHROOT()?
Thanks,
Martin Biuw

David Winsemius, MD
Heritage Laboratories
West Hartford, CT

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