2007/5/8, Jose Sierra <[EMAIL PROTECTED]>: > Hello. > > I need calculate the median of several column of a data.frame, in a new > column of this data frame, but the median operator only calculate from a > vector. > > I have made a functionc that calculate the median but it is very slow. > Are there any method in any package to calculate this? > > Best regards. > Jose Sierra. > > A B C > -0.01678042 -0.0003354948 -0.0003354948 > 0.17320485 0.2359448911 0.4884204711 > -0.76066019 -0.6024409891 -0.5814788340 > -0.04365426 -0.0060560612 -0.0025470274 > 0.01885735 0.0027792718 0.0184081858 > -0.07275884 -0.0371542622 -0.0315041630 > 0.05740122 0.0814235514 0.0468193512 > -0.05404834 -0.0590145580 0.0489612929 > -0.28197518 -0.1899247807 -0.2089076920 > -0.02465713 -0.2222512947 -0.2688619668 > > ______________________________________________ > R-devel@r-project.org mailing list > https://stat.ethz.ch/mailman/listinfo/r-devel >
Maybe you can start with this: m2 <- data.frame(matrix(c( -0.01678042, -0.0003354948, -0.0003354948, 0.17320485, 0.2359448911, 0.4884204711, -0.76066019, -0.6024409891, -0.5814788340, -0.04365426, -0.0060560612, -0.0025470274, 0.01885735, 0.0027792718, 0.0184081858, -0.07275884, -0.0371542622, -0.0315041630, 0.05740122, 0.0814235514, 0.0468193512, -0.05404834, -0.0590145580, 0.0489612929, -0.28197518, -0.1899247807, -0.2089076920, -0.02465713, -0.2222512947, -0.2688619668 ),nrow=10)) m2[,4]<- median(m2[,1]) m2[,5]<- median(m2[,2]) m2[,6]<- median(m2[,3]) Rod. ______________________________________________ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel
