Thanks, Your advice solved the problem for one substitution, but I needed to substitute twice: first s = (a+b+c)/2 and than c = sqrt(a^2 + b^2 -2*a*b*cos(gamma)) and I hoped I can do it simultaneously Luckily, I managed to go round the problem and this operation is not necessary anymore:)
Thanks anyway zbynek -- View this message in context: http://r.789695.n4.nabble.com/Substituting-inside-expression-tp3324092p3327698.html Sent from the R help mailing list archive at Nabble.com. ______________________________________________ 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.
