Ok, I'll try to do this... Thanks :D
2015-04-18 18:55 GMT-03:00 Boris Steipe <boris.ste...@utoronto.ca>: > Re-reading your question and taking a wild guess, perhaps you are looking > for parse() and eval() ... > > xyz <- data.frame( a=c(1,2), b=c(3,4)) > xyz > > a b > 1 1 3 > 2 2 4 > > expp <- parse(text="xyz$a > 1 & xyz$b == 4") # turn a string into an > expression > expp > > expression(xyz$a > 1 & xyz$b == 4) > > xyz[eval(expp), ] # evaluate an expression in > place > a b > 2 2 4 > > ... but really, it's just a guess at what you might be trying to do. > > B. > > > > > On Apr 18, 2015, at 1:30 PM, Boris Steipe <boris.ste...@utoronto.ca> > wrote: > > > Sorry - it's not entirely clear to me what you need to do. > > > > See here for some hints on how to ask questions on this list. I'm sure > we'll be able to help quickly. > > http://adv-r.had.co.nz/Reproducibility.html > > > http://stackoverflow.com/questions/5963269/how-to-make-a-great-r-reproducible-example > > (and don't post in HTML :-) > > > > > > B. > > > > On Apr 18, 2015, at 11:10 AM, Fernando Gama <f.fabiogam...@gmail.com> > wrote: > > > >> 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.ste...@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.fabiogam...@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@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 > >> > >> > > > > ______________________________________________ > > R-help@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 Vale of Institute Technology [[alternative HTML version deleted]] ______________________________________________ R-help@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.
