Re: [R] regular expression for selection

2011-11-14 Thread Uwe Ligges
On 14.11.2011 11:27, Petr PIKAL wrote: Hi Thank you. It is a pure magic, something taught in Unseen University. this is what I got as a help for selecting only letters from set of character vector. vzor [1] "61A" "62C/27" "65A/27" "66C/29" "69A/29" "70C/31" "73A/31" [8] "74C/33

Re: [R] regular expression for selection

2011-11-14 Thread Petr PIKAL
Hi Thank you. It is a pure magic, something taught in Unseen University. this is what I got as a help for selecting only letters from set of character vector. > vzor [1] "61A" "62C/27" "65A/27" "66C/29" "69A/29" "70C/31" "73A/31" [8] "74C/33" "77A/33" "81A/35" "82C/37" "85A/37"

Re: [R] regular expression for selection

2011-11-14 Thread Rainer Schuermann
Does library( stringr ) str_extract( mena, "m5[0-9]" ) achieve what you are looking for? Rgds, Rainer On Monday 14 November 2011 10:22:09 Petr PIKAL wrote: > Hi > > > On 11/14/2011 07:45 PM, Petr PIKAL wrote: > > > Dear all > > > > > > I am again (as usual) lost in regular expression use for

Re: [R] regular expression for selection

2011-11-14 Thread Uwe Ligges
On 14.11.2011 10:22, Petr PIKAL wrote: Hi On 11/14/2011 07:45 PM, Petr PIKAL wrote: Dear all I am again (as usual) lost in regular expression use for selection. Here are my data: dput(mena) c("138516_10g_50ml_50c_250utes1_m53.00-_s1.imp", "138516_10g_50ml_50c_250utes1_m54.00_s1.imp", "

Re: [R] regular expression for selection

2011-11-14 Thread Petr PIKAL
Hi > On 11/14/2011 07:45 PM, Petr PIKAL wrote: > > Dear all > > > > I am again (as usual) lost in regular expression use for selection. Here > > are my data: > > > >> dput(mena) > > c("138516_10g_50ml_50c_250utes1_m53.00-_s1.imp", > > "138516_10g_50ml_50c_250utes1_m54.00_s1.imp", > > "138516_10g_

Re: [R] regular expression for selection

2011-11-14 Thread Petr PIKAL
Hi > > Hi, > > Try grepl instead of sub, > > mena[grepl("m5.", mena)] It does not select those "m5?" strings from those character vectors. I need as an output a vector m53, m54, m55, m56, m57, m58, m59 Regards Petr > > HTH, > > baptiste > > On 14 November 2011 21:45, Petr PIKAL wrote:

Re: [R] regular expression for selection

2011-11-14 Thread Jim Lemon
On 11/14/2011 07:45 PM, Petr PIKAL wrote: Dear all I am again (as usual) lost in regular expression use for selection. Here are my data: dput(mena) c("138516_10g_50ml_50c_250utes1_m53.00-_s1.imp", "138516_10g_50ml_50c_250utes1_m54.00_s1.imp", "138516_10g_50ml_50c_250utes1_m55.00_s1.imp", "138

Re: [R] regular expression for selection

2011-11-14 Thread baptiste auguie
Hi, Try grepl instead of sub, mena[grepl("m5.", mena)] HTH, baptiste On 14 November 2011 21:45, Petr PIKAL wrote: > Dear all > > I am again (as usual) lost in regular expression use for selection. Here > are my data: > >> dput(mena) > c("138516_10g_50ml_50c_250utes1_m53.00-_s1.imp", > "138516

[R] regular expression for selection

2011-11-14 Thread Petr PIKAL
Dear all I am again (as usual) lost in regular expression use for selection. Here are my data: > dput(mena) c("138516_10g_50ml_50c_250utes1_m53.00-_s1.imp", "138516_10g_50ml_50c_250utes1_m54.00_s1.imp", "138516_10g_50ml_50c_250utes1_m55.00_s1.imp", "138516_10g_50ml_50c_250utes1_m56.00_s1.imp"