JasonI don't know how it works with a g-test, but the common statistical remedy for this is to add 1 or 0.1 to all numbers which then allows the calculation of a log transform but preserves the relative relationships among data points. cheers, cheers, g2
On Wed, Feb 12, 2014 at 9:56 AM, Gary Grossman <[email protected]> wrote: > I don't know how it works with a g-test, but the common statistical remedy > for this is to add 1 or 0.1 to all numbers which then allows the > calculation of a log transform but preserves the relative relationships > among data points. cheers, cheers, g2 > > > On Wed, Feb 12, 2014 at 12:56 AM, Jason Hernandez < > [email protected]> wrote: > >> Some time ago, I inquired about ways to analyze percent cover data, and >> one of the suggestions was to test for heterogeneity. The snag, however, >> is that this requires multiplying each cell value by its natural log. My >> data set has a lot of zero values, which are important to keep; but of >> course there is no natural log of zero. Is there a way to adjust the >> analysis to included these zero values? i have not managed to find >> anything on this. >> >> Jason Hernandez >> >> > > > -- > Gary D. Grossman, PhD > > Professor of Animal Ecology > Warnell School of Forestry & Natural Resources > University of Georgia > Athens, GA, USA 30602 > > Research & teaching web site - > http://grossman.myweb.uga.edu/<http://www.arches.uga.edu/%7Egrossman> > > Board of Editors - Animal Biodiversity and Conservation > Editorial Board - Freshwater Biology > Editorial Board - Ecology Freshwater Fish > > Sculpture by Gary D. Grossman > https://www.facebook.com/pages/Gary-Grossmans-Sculpture-Portfolio/124819124227147?fref=ts > > Hutson Gallery Provincetown, MA - www.hutsongallery.net/artists.html > > My ukulele channel - www.youtube.com/user/garydg29 > > > -- Gary D. Grossman, PhD Professor of Animal Ecology Warnell School of Forestry & Natural Resources University of Georgia Athens, GA, USA 30602 http://grossman.myweb.uga.edu/ <http://www.arches.uga.edu/%7Egrossman> Board of Editors - Animal Biodiversity and Conservation Editorial Board - Freshwater Biology Editorial Board - Ecology Freshwater Fish
