[R] "invalid argument to unary operator" while selecting rows by name

[Pauline Laïlle]

Works like a charm, thanks!
Still don't know what that error message means though. Any idea?

2016-09-20 20:13 GMT+02:00 <ruipbarradas at sapo.pt>:

> Sorry, I've made a stupid mistake.
> It's obviously the other way around.
>
> ix <- which(rownames(data) %in% c("601", "604"))
> clean <- data[-ix, ]
>
>
> Rui Barradas
>
>
> Citando ruipbarradas at sapo.pt:
>
>
> Hello,
>>
>> Try something like the following.
>>
>> ix <- which(c("601", "604") %in% rownames(data))
>> clean <- data[-ix, ]
>>
>>
>> Hope this helps,
>>
>> Rui Barradas
>>
>>
>>
>>
>> Citando Pauline Laïlle <pauline.laille at gmail.com>:
>>
>> Dear all,
>>>
>>> I built a dataframe with read.csv2(). Initially, row names are integers
>>> (order of answers to a survey). They are listed in the csv's first
>>> column.
>>> The import works well and my dataframe looks like I wanted it to look.
>>>
>>> Row names go as follows :
>>> [1] "6"   "29"  "31"  "32"  "52"  "55"  "63"  "71"  "72"  "80"  "88"
>>> "89"
>>> "91"  "93"  "105" "110" "111" "117" "119" "120"
>>> [21] "122" "127" "128" "133" "137" "140" "163" "165" "167" "169" "177"
>>> "178" "179" "184" "186" "192" "193" "200" "201" "228"
>>> etc.
>>>
>>> I would like to drop rows "601" & "604" to clean the dataframe.
>>>
>>> While data["601",] shows me the first row i'd like to drop, data[-"601",]
>>> returns the following :
>>> Error in -"601" : invalid argument to unary operator
>>>
>>> idem with data[c("601","604"),] and data[-c("601","604"),]
>>>
>>> It is the first time that I run into this specific error. After reading a
>>> bit about it I still don't understand what it means and how to fix it.
>>>
>>> Thanks for reading!
>>> Best,
>>> Pauline.
>>>
>>>         [[alternative HTML version deleted]]
>>>
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>>> 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/posti
>> ng-guide.html
>> and provide commented, minimal, self-contained, reproducible code.
>>
>
>
>
>

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