[R] Help with tryCatch

eric ericstrom at aol.com
Sun Jul 10 21:37:42 CEST 2011

I tried the following:

zest[i] <- tryCatch(sapply(getNodeSet(zdoc, "//zestimate/amount"),
xmlValue), error=function() NA)

Here's what happens :

Error in zest[i] <- tryCatch(sapply(getNodeSet(zdoc, "//zestimate/amount"), 
  replacement has length zero

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