Here is one way of doing it: > x # your data subject week value 1 1 1 4 2 2 1 8 3 3 1 3 4 4 1 5 5 1 2 5 6 2 2 6 7 3 2 2 8 4 2 6 9 1 3 3 10 2 3 7 11 3 3 3 12 4 3 7 > x.mean <- tapply(x$value, x$week, mean) # take the mean by 'week' > x.mean # resulting vector 1 2 3 5.00 4.75 5.00 > # plot using 'names' to get the 'week' > plot(as.numeric(names(x.mean)), x.mean, xlab='week', ylab='mean', type='b') >
On 1/2/06, Kare Edvardsen <[EMAIL PROTECTED]> wrote: > > Hi all! > > I've got a datstructure like this: > > subject week value > > 1 1 4 > 2 1 8 > 3 1 3 > 4 1 5 > > 1 2 5 > 2 2 6 > 3 2 2 > 4 2 6 > > 1 3 3 > 2 3 7 > 3 3 3 > 4 3 7 > > I'd like to plot the mean of 'value' against week. Is there a direct way > of doing this or do I have to make a new structure with the calculated > values and then plot it? > > All the best! > > -- > ########################################### > Kare Edvardsen <[EMAIL PROTECTED]> > Norwegian Institute for Air Research (NILU) > Polarmiljosenteret > NO-9296 Tromso http://www.nilu.no > Swb. +47 77 75 03 75 Dir. +47 77 75 03 90 > Fax. +47 77 75 03 76 Mob. +47 90 74 60 69 > ########################################### > > ______________________________________________ > 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 > -- Jim Holtman Cincinnati, OH +1 513 247 0281 What the problem you are trying to solve? [[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
