[R] sum some columns for each row

[Jim Lemon]

Hi Dawn,
Your data are a bit messed up, but try the following:

colSums(dat[,grep("ABC",names(dat),fixed=TRUE)],na.rm=TRUE)
colSums(dat[,grep("XYZ",names(dat),fixed=TRUE)],na.rm=TRUE)

I'm assuming that you want to discard the NA values.

Jim

On Fri, Jul 10, 2015 at 6:52 AM, Rui Barradas <ruipbarradas at sapo.pt> wrote:
> Hello,
>
> Please use ?dput to give a data example, like this it's completely
> unreadable. If your data.frame is named 'dat' use
>
> dput(head(dat, 30))  # paste the outut of this in your mail
>
>
> And don't post in html, use plain text only, like the posting guide says.
>
> Rui Barradas
>
>
> Em 09-07-2015 18:12, Dawn escreveu:
>>
>> Hi,
>>
>> I have a big dataframe as follows
>>
>>      109ABC    109XYZ    18ABC    18XYZ    22XYZ    23ABC    25ABC
>> 25XYZ
>>     30ABC    31XYZ    32ABC    32XYZ    34DCM    34XYZ    36ABC    36SUR
>> 38DCM    38XYZ    39DCM    39SUR    41DCM    41SUR    42DCM    42SUR
>> 46SUR    52DCM    64ABC    64XYZ    65ABC    65XYZ    66ABC    66XYZ
>> 67XYZ    68ABC    68SUR    70MES    70SUR    72ABC    72XYZ    76ABC
>> 76XYZ    82ABC    85ABC    POV
>> Cluster_1                                                        17    1
>> 3    10    14    5    2    2        1    1    1    2
>>                          2                            TT:61
>> Cluster_2                    1                                4    20
>> 6    5    3    6    9    9    6        10        1    3    1
>>                              4                            TT:88
>> Cluster_3    3        3                            6        4        17
>> 17    18    13    17    19    22    11    5    21    8    5    18    4
>> 7                                        9
>> TT:227
>> ........
>>
>> I want to get two columns, i.e,  one is to sum columns for all including
>> ABC for each row and the other is  to sum columns for all including XYZ
>> for
>> each row.
>>
>> Is there some help? Thank you!
>> Dawn
>>
>>         [[alternative HTML version deleted]]
>>
>> ______________________________________________
>> R-help at r-project.org mailing list -- To UNSUBSCRIBE and more, see
>> 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.
>>
>
> ______________________________________________
> R-help at r-project.org mailing list -- To UNSUBSCRIBE and more, see
> 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.