Hi All, Sorry for one basic question. My vector contains two class of group elements, shown in different font and color x=c(*1.1, 1.2, 1.3*, 2.1, 2.2) I am trying to group the objects into two classes, as *1.1, 1.2, 1.3* and 2.1, 2.2 I can use command grep("^1.[12345678910]",x) [1] 1 2 3 > grep("^2.[12345678910]",x) [1] 4 5 but I am not able to automate it, using some variable k. I have many such cases, so I want to write a iterative loop for the structure using some variable k, for test case, lets assume k=1 grep("^k.[12345678910]",x) integer(0) Thanks in advance. Alok -- ************************************************************ Alok Kumar Srivastava Assistant Professor CRRao Advanced Institute of Mathematics, Statistics and Computer Science (AIMSCS) Gachibowli, Hyderabad 500046. ************************************************************ [[alternative HTML version deleted]]

You're telling R that "k" is just a character in the grep pattern. Try: grep(sprintf("^%i.[0-9]",k), x)) -- Devon Ryan, Ph.D. Email: dpryan@dpryan.com Laboratory for Molecular and Cellular Cognition German Centre for Neurodegenerative Diseases (DZNE) Ludwig-Erhard-Allee 2 53175 Bonn Germany <devon.ryan@dzne.de> On Wed, Aug 7, 2013 at 11:26 AM, ALok <foralok@gmail.com> wrote: > Hi All, > Sorry for one basic question. My vector contains two class of group > elements, shown in different font and color > x=c(*1.1, 1.2, 1.3*, 2.1, 2.2) > I am trying to group the objects into two classes, as *1.1, 1.2, 1.3* and > 2.1, 2.2 > > I can use command > grep("^1.[12345678910]",x) > [1] 1 2 3 > > > grep("^2.[12345678910]",x) > [1] 4 5 > > but I am not able to automate it, using some variable k. > I have many such cases, so I want to write a iterative loop for the > structure using some variable k, > for test case, lets assume > > k=1 > grep("^k.[12345678910]",x) > integer(0) > > > Thanks in advance. > > Alok > > > > > -- > ************************************************************ > Alok Kumar Srivastava > Assistant Professor > CRRao Advanced Institute of Mathematics, Statistics and Computer Science > (AIMSCS) > Gachibowli, Hyderabad 500046. > ************************************************************ > > [[alternative HTML version deleted]] > > _______________________________________________ > Bioconductor mailing list > Bioconductor@r-project.org > https://stat.ethz.ch/mailman/listinfo/bioconductor > Search the archives: > http://news.gmane.org/gmane.science.biology.informatics.conductor > [[alternative HTML version deleted]]