One way is to create a list of the dataframes and then use 'sapply' to extract the values:
df.list <- list(FeketeJAN, ..., FeketeDEC) plot(sapply(df.list, function(a) a["AMAZON", "SUM_"])) On Mon, May 18, 2009 at 7:17 AM, Steve Murray <smurray...@hotmail.com>wrote: > > Dear R Users, > > I have 12 data frames, each of 12 rows and 2 columns. > > e.g. FeketeJAN > MEAN SUM_ > AMAZON 144.4997874 68348.4 > NILE 5.4701955 1394.9 > CONGO 71.3670036 21196.0 > MISSISSIPPI 18.9273250 6511.0 > AMUR 1.8426874 466.2 > PARANA 58.3835497 13486.6 > YENISEI 1.4668313 592.6 > OB 1.4239179 559.6 > LENA 0.9342164 387.7 > NIGER 4.7245709 826.8 > ZAMBEZI 76.6893794 8665.9 > YANGTZE 10.6759257 1729.5 > > > I want to do a line plot of the value of Amazon 'Sum' (in this case, > 68348.4) for each of the 12 data frames. I've tried doing this as follows: > > plot(FeketeJAN[1,2], FeketeFEB[1,2], FeketeMAR[1,2], *through to December* > type="l") > > but receive: Error in strsplit(log, NULL) : non-character argument > > > I've also tried: > > plot(FeketeJAN$AMAZON[,2], FeketeFEB$AMAZON[,2], *through to December* > type="l") > > but receive: > > Error in plot.window(...) : need finite 'xlim' values > In addition: Warning messages: > 1: In min(x) : no non-missing arguments to min; returning Inf > 2: In max(x) : no non-missing arguments to max; returning -Inf > 3: In min(x) : no non-missing arguments to min; returning Inf > 4: In max(x) : no non-missing arguments to max; returning -Inf > > > What is it that I'm doing wrong?! > > Many thanks for any advice, > > Steve > > > > _________________________________________________________________ > [[elided Hotmail spam]] > > ______________________________________________ > 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<http://www.r-project.org/posting-guide.html> > and provide commented, minimal, self-contained, reproducible code. > -- Jim Holtman Cincinnati, OH +1 513 646 9390 What is the problem that you are trying to solve? [[alternative HTML version deleted]] ______________________________________________ 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.
