See ?log1p
Best,
Philippe Grosjean
..............................................<°}))><........
) ) ) ) )
( ( ( ( ( Prof. Philippe Grosjean
) ) ) ) )
( ( ( ( ( Numerical Ecology of Aquatic Systems
) ) ) ) ) Mons-Hainaut University, Belgium
( ( ( ( (
..............................................................
Nate Upham wrote:
I have a general stats question for you guys:
How does one normally deal with zero (0) values when log transforming data?
I would like to log transform (natural log, ln) several response variables for
use in quantile
regression. But one of my variables includes several zero values. Since ln(0)
= infinity, this is
not readily possible. Is it best to remove all data with zero values? Or
should I add a very small
number to each value (e.g., 0.00001)? This seems problematic. Is there an
easy way to address this
issue?
Thanks much for your help,
--Nate
_________________________________
Nathan S. Upham
Ph.D. student
Committee on Evolutionary Biology
University of Chicago
1025 E. 57th St., Culver 402
Chicago, IL 60637
nsup...@uchicago.edu
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