An `as.numeric()` in R that warns about non-numeric values
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as.numeric.verbose = function(x) { | |
# this code will parse german-style comma-as-decimal numbers or | |
# english-style dot-as-decimal numbers. | |
x = ifelse(grepl('^\\d+,\\d+$', x, perl=T), sub(',', '.', x, fixed=T), x) | |
x.num = as.numeric(x) | |
# Find which values got coerced to NA | |
coerced = which(!is.na(x) & is.na(x.num)) | |
if (length(coerced) > 0) { | |
cat("Following values coerced to NA:\n") | |
print(paste(coerced, x[coerced])) | |
} | |
x.num | |
} |
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