[R] Help with decimal points

[David Winsemius]

On Sep 7, 2010, at 4:38 PM, Amit Patel wrote:

> I have found a little problem with an R script. I am trying to merge  
> some data
> and am finding something unusual going on. As shown below I am  
> trying to
> assign (MatchedValues[Value2,Value]) to  (ClusteredData[k,Value])  
> which are two
> separate dataframes.
>
> 1) By the following command you can see that the value im transferring
> is 481844.03
>
>> MatchedValues[Value2,Value]
> [1] 481844.03
> 6618 Levels: 1.00E+07 1.01E+07 1.02E+07 1.04E+07 1.05E+07 1.06E 
> +07 ... Raw

This shows you that MatchValues' column eval(Value) is a factor  
represented internally by one of 6618 integers with various level  
labels. The label of the item in row eval(Value2) is "481844.03". The  
label is a character object.

>
> 2) But when I try to replace the values using the command i get a  
> value of 4420
>
>> ClusteredData[k,Value] <- MatchedValues[Value2,Value]
>
>> ClusteredData[k,Value]
> [1] "4420"
>
>
> 3) So what am I not doing. How can I keep that same value of 481844.03
> I have tried

Read FAQ 7.10:

http://cran.r-project.org/doc/FAQ/R-FAQ.html#How-do-I-convert-factors-to-numeric_003f

-- 
David.
>
>
>> as.double(MatchedValues[Value2,Value])
> [1] 4420
>
>> as.numeric(MatchedValues[Value2,Value])
> [1] 4420
>
-- 

David Winsemius, MD
West Hartford, CT