[R] reshape from wide to long

[Juliet Hannah]

Out of curiosity, what would be a good way to do this without using
the reshape package? Thanks!

On Wed, Feb 25, 2009 at 8:04 PM, jim holtman <jholtman at gmail.com> wrote:
> You can use the 'reshape' package:
>
>> x <- read.table(textConnection(" Grp        X0        X3               X6           X12          X25     X50
> +    1    C 0.5326517 0.6930942  0.9403883  1.157571  2.483117  2.809012
> + 2    C 0.4715917 0.8613200  2.0706117  2.937632  7.530960  7.120678
> + 3    C 0.5021217 0.7772071  1.5055000  2.047601  5.007038  4.964845
> + 4    E 0.5845200 0.6439033  0.8221400  2.148100  1.862153 12.412500
> + 5    E 0.2985675 0.6561142  1.0987058  2.842180  4.057899  2.319930
> + 6    E 1.7854500 1.9813878  1.8340700  3.507966  1.120367  2.603823
> + 7    E 6.4370500 2.2302000 18.5271000 17.139600 22.978400  7.116638
> + 8    E 2.2763969 1.3779013  5.5705040  6.409461  7.504704  6.113223
> + 9    T 0.9649327 0.9825045  1.0099582  1.713536  4.652827  3.877736
> + 10   T 2.0774727 2.4916545  4.0087455  8.183382 26.381091 26.279636
> + 11   T 2.2527000 2.6311091  3.1711727  4.316418  9.255364 28.771473
> + 12   T 1.3989636 1.7640273  2.5264636  4.712164 23.606545 32.030000
> + 13   T 1.4211167 1.5128417  1.7613583  2.351858  8.411725 55.448000
> + 14   T 1.5992167 2.2668167  2.5927667  2.947150  6.025300 24.984767
> + 15   T 2.9468333 3.3383667  3.1090667  3.244675  3.037425  2.679587
> + 16   T 1.0867725 1.7652583  2.0307008  5.201625  8.279975 14.693583
> + 17   T 1.7185010 2.0940723  2.5262791  4.083851 11.206282
> 23.595598"), header=TRUE)
>> closeAllConnections()
>> require(reshape)
> Loading required package: reshape
> Loading required package: plyr
>> x.m <- melt(x)
> Using Grp as id variables
>>
>> head(x.m)
>  Grp variable     value
> 1   C       X0 0.5326517
> 2   C       X0 0.4715917
> 3   C       X0 0.5021217
> 4   E       X0 0.5845200
> 5   E       X0 0.2985675
> 6   E       X0 1.7854500
>>
>
>
> On Wed, Feb 25, 2009 at 4:59 PM, Veerappa Chetty <chettyvk at gmail.com> wrote:
>> Hi,I would like to reshape the following "wide" data set to "long" form. I
>> would appreciate help with the correct code for "reshape". I tried a few
>> unsuccessfully.
>> Thanks.
>> Chetty
>> __________________________________________________
>> dat.1
>>
>>  Grp        X0        X3               X6           X12          X25
>>    X501    C 0.5326517 0.6930942  0.9403883  1.157571  2.483117  2.809012
>> 2    C 0.4715917 0.8613200  2.0706117  2.937632  7.530960  7.120678
>> 3    C 0.5021217 0.7772071  1.5055000  2.047601  5.007038  4.964845
>> 4    E 0.5845200 0.6439033  0.8221400  2.148100  1.862153 12.412500
>> 5    E 0.2985675 0.6561142  1.0987058  2.842180  4.057899  2.319930
>> 6    E 1.7854500 1.9813878  1.8340700  3.507966  1.120367  2.603823
>> 7    E 6.4370500 2.2302000 18.5271000 17.139600 22.978400  7.116638
>> 8    E 2.2763969 1.3779013  5.5705040  6.409461  7.504704  6.113223
>> 9    T 0.9649327 0.9825045  1.0099582  1.713536  4.652827  3.877736
>> 10   T 2.0774727 2.4916545  4.0087455  8.183382 26.381091 26.279636
>> 11   T 2.2527000 2.6311091  3.1711727  4.316418  9.255364 28.771473
>> 12   T 1.3989636 1.7640273  2.5264636  4.712164 23.606545 32.030000
>> 13   T 1.4211167 1.5128417  1.7613583  2.351858  8.411725 55.448000
>> 14   T 1.5992167 2.2668167  2.5927667  2.947150  6.025300 24.984767
>> 15   T 2.9468333 3.3383667  3.1090667  3.244675  3.037425  2.679587
>> 16   T 1.0867725 1.7652583  2.0307008  5.201625  8.279975 14.693583
>> 17   T 1.7185010 2.0940723  2.5262791  4.083851 11.206282 23.595598
>>
>>
>> --
>> Professor of Family Medicine
>> Boston University
>> Tel: 617-414-6221, Fax:617-414-3345
>> emails: chettyvk at gmail.com,vchetty at bu.edu
>>
>>        [[alternative HTML version deleted]]
>>
>> ______________________________________________
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>> https://stat.ethz.ch/mailman/listinfo/r-help
>> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
>> and provide commented, minimal, self-contained, reproducible code.
>>
>
>
>
> --
> Jim Holtman
> Cincinnati, OH
> +1 513 646 9390
>
> What is the problem that you are trying to solve?
>
> ______________________________________________
> R-help at r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
>