[R] about data structure

Rui Barradas ruipbarradas at sapo.pt
Mon Nov 7 21:30:53 CET 2016




Hope this helps,

Rui Barradas

Em 07-11-2016 20:24, lily li escreveu:
> Hi R users,
> I'm wondering why the values changed when I try to transform factors into
> numerics.
> For example, for a data frame DF, there is one column called precipitation,
> which is usually lower than 100mm. But this column is factor when I read in
> the data. When transform to numeric values, some rows can be higher than
> 1000mm. What is the problem? Thanks.
> DF$prec_new = as.numeric(DF$precip)
> 	[[alternative HTML version deleted]]
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