Greetings I have a dataset with occurrence records of multiple species. I need to get rid of multiple listings of the same occurrence point for a species (as you see below in red and blue typeface). How do I create a dataset only with unique set of longitude and latitude for each species? Thanks in advance.
Species_name Longitude Latitude Abies concolor -106.601 35.868 Abies concolor -106.493 35.9682 Abies concolor -106.489 35.892 Abies concolor -106.496 35.8542 Accipiter cooperi -119.688 34.4339 Accipiter cooperi -119.792 34.5069 Accipiter cooperi -118.797 34.2581 Accipiter cooperi -77.38333 39.68333 Accipiter cooperi -77.38333 39.68333 Accipiter cooperi -75.99153 40.633335 Accipiter cooperi -75.99153 40.633335 - Kumar -- Section of Integrative Biology University of Texas at Austin Austin, Texas 78712, USA [[alternative HTML version deleted]] ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.