The inquiry below and similar ones seem a lot like homework problems. They are distinguished by showing no evidence of the OP's ever having read a manual and also by being problems of apparently pedagogical interest. The Fortran group (comp.lang.fortran) has a long tradition of not giving more than the broadest of hints in response to such inquiries, and I would encourage r-help readers to consider doing the same.
MHP Yuying Shi wrote: >If I have matrics as follows: > > >>a <- c(1,1,0,0) >>b <- c(4,4,0,0) >>c <- c(3,5,5,6) >> >> >How can I use R code to solve the equation ax^2+bx+c=0. >thanks! > yuying shi > > [[alternative HTML version deleted]] > >______________________________________________ >R-help@stat.math.ethz.ch mailing list >https://stat.ethz.ch/mailman/listinfo/r-help >PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html > > ______________________________________________ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html