Dear R-help list, I would like to replace all lower-case letters in a string that are not part of certain fixed expressions. For example, I have the string:
"pmin(pmax(pmin(x1, X2), pmin(X3, X4)) == Y, pmax(Z1, z1))" Where I would like to replace all lower-case letters that do not belong to the functions "pmin" and "pmax" by 1 - toupper(...) to get "pmin(pmax(pmin(1 - X1, X2), pmin(X3, X4)) == Y, pmax(Z1, 1 - Z1))" Any ideas on how I could achieve that? Many thanks and best wishes, Alrik ******************************** Alrik Thiem Post-Doctoral Researcher Department of Philosophy University of Geneva Rue de Candolle 2 CH-1211 Geneva +41 76 527 80 83 http://www.alrik-thiem.net http://www.compasss.org ______________________________________________ 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.
