[R] combining numeric vector and column in a data frame
Simon Knapp
sleepingwell at gmail.com
Wed Jul 11 01:01:26 CEST 2012
combined <- data.frame(mnv=my.numeric.vec[df1$fileName], type=df1$type)
sorted <- combined[order(rownames(combined)),]
On Wed, Jul 11, 2012 at 8:38 AM, Adrian Johnson
<oriolebaltimore at gmail.com> wrote:
> Hi:
> I am trying to map column names of a matrix to another data frame and
> get values in a different column of data frame
>
>
> I have a matrix m.
>
>> my.numeric vec <- m[1,]
>
>> my.numeric.vec
> a b c d e f
> 2 1 4 9 10 3
>
>
>
> ## my data frame = df1
>
>> df1
>
> fileName type status
> b N alive
> a T dead
> d N alive
> c T dead
> f N alive
> e T dead
>
>
> I want to combine as.numeric.vec and df1 and create j with correct
> filename and type and numeric value
>
>>j
>
> my.numeric.vec type
> a 2 T
> b 1 N
> c 4 T
> d 9 N
> e 10 T
> f 3 N
>
> How can I combine my.numeric.vec and df1$type
>
> when I try:
>
> df1[df1$fileName %in% names(my.numeric.vec),2]
>
> I get wrong answer.
>
>
> thanks in advance.
>
> Adrian
>
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