Please read the Posting Guide before you post again, and study how to make a reproducible example of your problem [1], and change the settings on your mail program to send plain text. I, for one, am not psychic, so need things spelled out clearly.
[1] http://stackoverflow.com/questions/5963269/how-to-make-a-great-r-reproducible-example --------------------------------------------------------------------------- Jeff Newmiller The ..... ..... Go Live... DCN:<jdnew...@dcn.davis.ca.us> Basics: ##.#. ##.#. Live Go... Live: OO#.. Dead: OO#.. Playing Research Engineer (Solar/Batteries O.O#. #.O#. with /Software/Embedded Controllers) .OO#. .OO#. rocks...1k --------------------------------------------------------------------------- Sent from my phone. Please excuse my brevity. capricy gao <capri...@yahoo.com> wrote: >Thanks a lot for all the responses!! > >I then first test my data: > >> dim(data) >[1] 52086 13 >> if(grep(data[3,4],data[3,12])==1) print("Y") >[1] "Y" >> for(i in 1:52086){if(grep(data[i,4],data[i,12])==1) print ("Y")} >Error in if (grep(data[i, 4], data[i, 12]) == 1) print("Y") : > argument is of length zero > > >What is this new error message? "argument is of length zero" > >Here is my data format: >>head(data) > > V1 V2 V3 V4 V5 V6 >V7 V8 >1 ref_gene_id ref_id class_code cuff_gene_id cuff_id FMI FPKM >FPKM_conf_lo >2 - - u C.3 C.3.1 100 1.000000 >0.000000 >3 - - u C.2 C.2.1 100 1.000000 >0.000000 >4 - - u C.4 C.4.1 100 1.000000 >0.000000 >5 - - u C.1 C.1.1 100 1.000000 >0.000000 >6 - - u C.5 C.5.1 100 1.000000 >0.000000 > V9 V10 V11 V12 V13 >1 FPKM_conf_hi cov len major_iso_id ref_match_len >2 0.000000 0.056682 96 C.3.1 - >3 0.000000 0.058453 99 C.2.1 - >4 0.000000 0.059634 101 C.4.1 - >5 0.000000 0.059634 101 C.2.1 - >6 0.000000 0.059634 101 C.5.1 - > > >________________________________ > From: Jeff Newmiller <jdnew...@dcn.davis.ca.us> >To: capricy gao <capri...@yahoo.com>; capricy gao <capri...@yahoo.com>; >"r-help@r-project.org" <r-help@r-project.org> >Sent: Friday, September 13, 2013 9:21 PM >Subject: Re: [R] problem with grep under loop > > >This is because you are not printing it (with the print or cat >functions). Keep in mind that the visible result you get from calling a >function or evaluating a variable interactively comes from the >interactive R command line, not from R itself. Once you put such an >expression inside a function (such as the "for" function) it is no >longer directly being invoked by the command interpreter. > >You might want to read [1] and [2] (which says don't post using HTML). > >[1] >http://stackoverflow.com/questions/4716152/why-do-r-objects-not-print-in-a-function-or-a-for-loop >[2] http://www.R-project.org/posting-guide.html >--------------------------------------------------------------------------- >Jeff Newmiller The ..... ..... Go >Live... >DCN:<jdnew...@dcn.davis.ca.us> Basics: ##.#. ##.#. Live >Go... > Live: OO#.. Dead: OO#.. >Playing >Research Engineer (Solar/Batteries O.O#. #.O#. with >/Software/Embedded Controllers) .OO#. .OO#. >rocks...1k >--------------------------------------------------------------------------- > >Sent from my phone. Please excuse my brevity. > >capricy gao <capri...@yahoo.com> wrote: >> >> >>I am just testing the possibility of using grep under for loop: >> >>>for(i in 1:10){grep("a",letters)} >> >> >>nothing came out; >> >>when I ran: >> >> >>>grep("a",letters), >> >> >>I got "1" >> >>so in my for loop, I expected to see ten "1"s, but I did not. >> >>Could anybody help me to figure out why? Thanks a lot for your help. >> >>Capricy >> [[alternative HTML version deleted]] >> >>______________________________________________ >>R-help@r-project.org mailing list >>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@r-project.org mailing list 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.
