[R] Problem with "dea.boot" under R 3.0.1

[greatest.possible.newbie]

Dear Vera,
I had a similar problem once and as far as I can remember the reason were
some negative inputs or outputs. 

# Check for negative values
x1a.neg <- apply(x1a, 1, function(x) any(x<0))
y1.neg <- apply(y1, 1, function(x) any(x<0))
exclude <- x1a.neg | y1.neg

# Exclude negative rows
x1a.neg <- x1a.neg[!exclude,]
y1.neg <- y1.neg[!exclude,]

# Try again!

Daniel



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