[R] Stucked with as.numeric function

[Tóth Dénes]

Hi,

I guess you have commas as decimals in your data. Replace it to decimal
points.

Best,
  Denes


>
> On Mar 21, 2011, at 1:57 PM, patsko at gmx.de wrote:
>
>> Hi list,
>>
>> I have problems with the as.numeric function. I have imported
>> probabilities from external data, but they are classified as factors
>> as str() shows. Therefore my goal is to convert the colum from
>> factor to numeric level with keeping the decimals.
>>
>> I have googled the problem for a while now and kept to several
>> advices like
>> http://cran.r-project.org/doc/FAQ/R-FAQ.html#How-do-I-convert-factors-to-numeric_003f
>>  and history from the list but it is impossible for me to convert
>> the data to numeric without rounding or ranking the values.
>
> Are you sure about rounding? The console display of numbers is
> determined by options that can be changed:
>
> ?options
>
> The "ranking" may represent an error on your part. You offer nothing
> that can be used to check your interpretations. Why not offer:
>
> dput(head(data_object))
>
>
>>
>> E.g.:
>> Simply using as.numeric puts the values into ranked classes as
>> explained in the manual,
>> As.numeric(as.character(probas)) as well as as.numeric(levels(probas
>> $forecast_probs))[as.integer(probas$forecast_probs)]
>> return “NA” for every row.
>
> Then maybe they were NA to begin with?
>
> Have you tried importing with colClasses set to "numeric" for the
> columns you knew to be such?
>>
>
> --
>
> David Winsemius, MD
> Heritage Laboratories
> West Hartford, CT
>
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