Hello everyone,

I am working with a large community dataset where column names are species and rows are filled with either 1s or 0s (presence absence of the species) and each row corresponds to a site name.  I have long and lati coordinates for each site in a separate datasheet.

I am trying to use a program called Maxent in order model species distributions. The program requires a specific occurrence dataset with columns in this format: species, Long, Lati.

It is very difficult and time consuming to create such a dataset by hand! I was wondering if anyone had any ideas as to how I can use R to manipulate my original community dataset in order to create the occurrence dataset I described above?

Any suggestions would be greatly appreciated!

Thanks,

Elyse Coffey
Biology (B.S.) student
University of Missouri-St. Louis


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