[R] transform 1 col to 2 col

[MacQueen, Don]

See insertion below

-- 
Don MacQueen

Lawrence Livermore National Laboratory
7000 East Ave., L-627
Livermore, CA 94550
925-423-1062





On 5/24/12 1:43 AM, "Jim Lemon" <jim at bitwrit.com.au> wrote:

>On 05/24/2012 05:10 PM, Soheila Khodakarim wrote:
>> Dear All
>>
>> How can I transform 1 column to 2 columns in R?
>>
>> 211217_s_at
>>
>> GO:0005249
>>
>> 211217_s_at
>>
>> GO:0005251
>>
>> 211217_s_at
>>
>>     GO:0005515
>>
>> 211217_s_at
>>
>> GO:0015271
>>
>>    211217_s_at
>>
>>    GO:0030955
>>
>>
>>
>>
>>
>> 211217_s_at
>>
>> GO:0005249
>>
>> 211217_s_at
>>
>> GO:0005251
>>
>>    211217_s_at
>>
>>     GO:0005515
>>
>> 211217_s_at
>>
>> GO:0015271
>>
>>    211217_s_at
>>
>> GO:0030955
>>
>Hi Soheila,
>Let us begin with the assumption that your "col" is roughly what you
>posted, and that text resides in a file named "inscrutable.dat". Let us
>first read that text into a data frame in R:
>
>inscrutatble.df<-read.table("inscrutable.dat")
>  inscrutable.df
>             V1 
>
>1 211217_s_at
>2  GO:0005249
>3  211217_s_at
>4   GO:0005251
>5  211217_s_at
>6   GO:0005515
>7  211217_s_at
>8   GO:0015271
>9  211217_s_at
>10  GO:0030955
>11 211217_s_at
>12  GO:0005249
>13 211217_s_at
>14  GO:0005251
>15 211217_s_at
>16  GO:0005515
>17 211217_s_at
>18  GO:0015271
>19 211217_s_at
>20  GO:0030955
>
>Now we will further assume that you want to place every odd element in
>one "col" and every even element in the other "col".


Or perhaps:

  matrix(inscrutable.df$V1, ncol=2, byrow=TRUE)

or
  data.frame(matrix(inscrutable.df$V1, ncol=2, byrow=TRUE))

to get a data frame.

-Don

>
>inscrutable2.df<-data.frame(
>  col1=inscrutable.df$V1[seq(1,length(inscrutable.df$V1),by=2)],
>  col2=inscrutable.df$V1[seq(2,length(inscrutable.df$V1),by=2)])
>inscrutable2.df
>           col1       col2
>1  211217_s_at GO:0005249
>2  211217_s_at GO:0005251
>3  211217_s_at GO:0005515
>4  211217_s_at GO:0015271
>5  211217_s_at GO:0030955
>6  211217_s_at GO:0005249
>7  211217_s_at GO:0005251
>8  211217_s_at GO:0005515
>9  211217_s_at GO:0015271
>10 211217_s_at GO:0030955
>
>There we are - easy as pie.
>
>Jim
>
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