Hi all,

Tnx for all the replies:
Mike Colvin provided a simple answer in one step.

Bats.cast <- dcast(data = Bats.melt, formula = Species ~ Location, fill =0)

tnx all for the reminder of potential issues of willy nilly replacing 
missing data with zeros.

In this case the 0 [zero value] for NAs is correct in this application 
as the NAs do not represent "missing data" but actually no occurrence of 
a critter in a given habitat location so the values need to be a 0.

Tnx again,

Bruce

-- 
Bruce W. Miller, PhD.
Neotropical bat risk assessments

If we lose the bats, we may lose much of the tropical vegetation and the lungs of the planet

Using acoustic sampling to map species distributions for >15 years.

Providing Interactive identification keys to the vocal signatures of New World Bats

For various project details see:

https://sites.google.com/site/batsoundservices/


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