R help - Jun 2016 - filter a data.frame in dependence of a column value

Hello togehter,

i have short question, maybe anyone can help me.

I have a data.frame like this one:

       NO       ORDER
1     1530     for Mr. Muller (10.0 -> 11.2)
2     1799     for Mr Giulani
3     1888     for Mr. Marius (11.2 -> 12)

I need a solution, which only contains the values in brackets. The result should
look like the following:

       NO       ORDER
1     1530     for Mr. Muller (10.0 -> 11.2)
2     1888     for Mr. Marius (11.2 -> 12)

I tried it with the following code, but that doesn't work.

data4.1<-data3[data3$ORDER%in% "[(]*->*[)]",]

maybe anyone can help me.

Thank you.

Best regards

Mat

	[[alternative HTML version deleted]]

Dear Mat,

You can use grepl() to select based on are regular expression.

subset(data3, grepl("\\(.*\\)", ORDER))

Best regards,

ir. Thierry Onkelinx
Instituut voor natuur- en bosonderzoek / Research Institute for Nature and
Forest
team Biometrie & Kwaliteitszorg / team Biometrics & Quality Assurance
Kliniekstraat 25
1070 Anderlecht
Belgium

To call in the statistician after the experiment is done may be no more
than asking him to perform a post-mortem examination: he may be able to say
what the experiment died of. ~ Sir Ronald Aylmer Fisher
The plural of anecdote is not data. ~ Roger Brinner
The combination of some data and an aching desire for an answer does not
ensure that a reasonable answer can be extracted from a given body of data.
~ John Tukey

2016-06-17 9:49 GMT+02:00 Matthias Weber <Matthias.Weber at
fntsoftware.com>:
> Hello togehter,
>
> i have short question, maybe anyone can help me.
>
> I have a data.frame like this one:
>
>        NO       ORDER
> 1     1530     for Mr. Muller (10.0 -> 11.2)
> 2     1799     for Mr Giulani
> 3     1888     for Mr. Marius (11.2 -> 12)
>
> I need a solution, which only contains the values in brackets. The result
> should look like the following:
>
>        NO       ORDER
> 1     1530     for Mr. Muller (10.0 -> 11.2)
> 2     1888     for Mr. Marius (11.2 -> 12)
>
> I tried it with the following code, but that doesn't work.
>
> data4.1<-data3[data3$ORDER%in% "[(]*->*[)]",]
>
> maybe anyone can help me.
>
> Thank you.
>
> Best regards
>
> Mat
>
>         [[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.
>
	[[alternative HTML version deleted]]

On Fri, 17 Jun 2016, Matthias Weber <Matthias.Weber at fntsoftware.com>
writes:
> Hello togehter,
>
> i have short question, maybe anyone can help me.
>
> I have a data.frame like this one:
>
>        NO       ORDER
> 1     1530     for Mr. Muller (10.0 -> 11.2)
> 2     1799     for Mr Giulani
> 3     1888     for Mr. Marius (11.2 -> 12)
>
> I need a solution, which only contains the values in brackets. The result
should look like the following:
>
>        NO       ORDER
> 1     1530     for Mr. Muller (10.0 -> 11.2)
> 2     1888     for Mr. Marius (11.2 -> 12)
>
> I tried it with the following code, but that doesn't work.
>
> data4.1<-data3[data3$ORDER%in% "[(]*->*[)]",]
>
> maybe anyone can help me.
>
> Thank you.
>
> Best regards
>
> Mat
>
Try ?grepl instead of %in%.

x <- c("for Mr. Muller (10.0 -> 11.2)",
       "for Mr Giulani",
       "for Mr. Marius (11.2 -> 12)")

grepl("[(].*->.*[)]", x)




-- 
Enrico Schumann
Lucerne, Switzerland
http://enricoschumann.net