[R] suggestion of regex pattern

[Fernando Gama]

Hello Boris,

thanks for your response.

So, firstly considered that  i've been input a set of serches strings (.txt
format) and i'm using regex to transform in a suitable  format to my
script. This part is a final part of my code and i wish putting in input to
a subset.

(.txt formatted)

---- STRINGS (INPUT)

*[1]  "municipio =='Limeira' "*
*[2]  "municipio =='Limeira' & mesincident =='marco' "*
*[3]  "​municipio =='Limeira' & mesincident =='marco' & trechoklmetros >
1.00 12.300"*
*...*
*..*
*..*
*..*
*[n] "......"*

*--------------*

desired_fomart <-
​it will reveice all strings to filter in a dataset by subset below:



a loop each line:

subset(dataset_read, *desired_fomart[i]*)

My question: taking into consideration this cenario, in your oppinion your
reply is my suitable for my problem, whereas i will to map each value in
database?

Once again, thank so much! :)

2015-04-18 11:04 GMT-03:00 Boris Steipe <boris.steipe at utoronto.ca>:

> This is not a regular expression but simply a conjunction (sequence of
> '&') of logical expressions. Moreover it's not wrong. Consider:
>
> xyz <- data.frame(municipio = c('Limeira'), mesincident = c('marco'),
> trechoklmetros = c(3.00, -4.00, 30))
> xyz
>
>   municipio mesincident trechoklmetros
> 1   Limeira       marco              3
> 2   Limeira       marco             -4
> 3   Limeira       marco             30
>
>
> xyz$municipio =='Limeira' & xyz$mesincident =='marco' & xyz$trechoklmetros
> > 1.00
> [1]  TRUE FALSE  TRUE
>
> xyz$municipio =='Limeira' & xyz$mesincident =='marco' & xyz$trechoklmetros
> > 1.00 & xyz$trechoklmetros <= 12.3
> [1]  TRUE FALSE FALSE
>
>
> If there's a problem it seems to be elsewhere.
> Cheers,
> Boris
>
>
> On Apr 17, 2015, at 4:22 PM, Fernando Gama <f.fabiogama88 at gmail.com>
> wrote:
>
> > Hello,
> >
> > I have benn problems to construct the pattern for this:
> >
> > municipio =='Limeira' & mesincident =='marco' & trechoklmetros > 1.00
> 12.300
> >
> > I would like:
> >
> > municipio =='Limeira' & mesincident =='marco' & trechoklmetros > 1.00
> > *& **trechoklmetros
> > <= *12.300
> > ​
> > ​Any suggestion?​
> >
> >
> > --
> > Att,
> >
> > Fernando Gama da Mata
> >
> >       [[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.
>
>


-- 
Att,

Fernando Gama da Mata

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