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Hi Everyone, I am a graduate student who will be using R to do my analysis. I need to do a spatial analysis, and the first step is to calculate the geographic distance between my study sites. I am hoping to use earth.dist because it allows for multiple pairwise distances to be calculated at one time. I have done a sample calculation, and I seem to have a problem between the steps of using

...uses polymorphic associations because there will be lots of different taggable items in my application; however, adding and removing tags is a bolt-on, not designed-in feature. The Dema mixin (dema.ruby.com.br/articles/2005/09/03/tagging-on-steroids-with-rails) appears to do more right out of the chutes but is HABTM so it may not be as flexible as DHH''s. Does anyone have thoughts on which has been most productive for you? How about the add/remove tag features? Thanks -- View this message in context: http://www.nabble.com/acts_as_taggable----which-one--tf2260421.html#a6271330 Sent from...

Hi, I have a simple beginner's question on removing a list of objects. Say I have objects C243.Daily1, C243.Daily2...C243.Daily5 in my workspace. I'd like to remove these without using rm five times. So I write. > a <- list(paste("C243.Daily",sep="",1:5)) > rm(a) Obviously this wouldn't work, as it would only remove the object a. But is there any way