Re: [R] Selecting unique values

2011-07-26 Thread Daniel Malter
Steven's solution is great, but it will only work if the rows are really duplicates. If the data frame contains another variable whose values vary, it will not work because then the rows are obviously unique. df<-data.frame(df,value=rnorm(11)) unique(df) You would then have to make a decision, w

Re: [R] Selecting unique values

2011-07-25 Thread Steven Kennedy
use unique() df <- data.frame(Species_name=c(rep('Abies concolor',4),rep('Accipiter cooperi',7)), Longitude=c(-106.601, -106.493, -106.489, -106.496, -119.688, -119.792, -118.797,-77.38333,-77.38333,-75.99153,-75.99153), Latitude=c(35.868, 35.9682, 35.892, 35.85

[R] Selecting unique values

2011-07-25 Thread Kumar Mainali
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 i