On Aug 19, 2011, at 9:45 AM, Eduardo Mendes wrote:
Hello Many thanks.* is not a typo. The output is a description of a nonlinear system so terms such as y(k-1)*y(k-2) are allowed. I wonder whether "" could be ignored so that the outputs such as y_{01}(k-003)* would not show up.
Paste with "*" then remove trailing "*"'s:
ifelse( grepl("*$", result), sub("*","", result), result)
Cheers EdOn Thu, Aug 18, 2011 at 3:40 PM, David Winsemius <dwinsem...@comcast.net > wrote:On Aug 18, 2011, at 2:35 PM, Eduardo Mendes wrote: Dear R-Users I have the following matrix out$desc [,1] [,2] [1,] "" "" [2,] "y_{01}(k-001)" "" [3,] "y_{01}(k-002)" "" [4,] "y_{01}(k-003)" "" [5,] "u_{01}(k-001)" "" [6,] "u_{01}(k-002)" "" [7,] "u_{01}(k-003)" "" [8,] "y_{01}(k-001)" "y_{01}(k-001)" [9,] "y_{01}(k-001)" "y_{01}(k-002)" [10,] "y_{01}(k-001)" "y_{01}(k-003)" [11,] "y_{01}(k-001)" "u_{01}(k-001)" and need to concatenate each line to a single string. Something like [2,] "y_{01}(k-001)" "" -> [2,] "y_{01}(k-001)"[11,] "y_{01}(k-001)" "u_{01}(k-001)" -> [11,] "y_{01}(k-001)*u_{01} (k-001)"Is there a way to do it without going through every column? apply(out$desc, 1, paste, collapse="")It is ambiguous what you want for a delimiter. In one case you used "", and another you used "*". I used "".-- David Winsemius, MD West Hartford, CT
David Winsemius, MD West Hartford, CT ______________________________________________ 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.
