I believe you're looking for: dim(a)
dim(a)[1] # Number of observations, in your example, 12 dim(a)[2] # Number of variables per observation, in your example, 9 --Jeff. On Sep 17, 2007, at 12:05 PM, Alfredo Alessandrini wrote: > Hi everybody, > > If I've a data frame like this: > > dataframe a > > X0 X2 X4 X6 X8 X10 X12 X14 X16 > 1957 0 0 0 0 0 0 0 0 0 > 1958 0 0 0 0 0 0 0 0 0 > 1959 831 0 0 0 0 0 0 0 0 > 1960 544 282 0 0 0 0 0 0 0 > 1961 446 365 0 0 0 0 0 0 0 > 1962 442 473 0 0 0 0 0 0 0 > 1963 595 468 0 0 0 0 0 0 0 > 1964 400 397 516 0 0 0 0 0 0 > 1965 417 382 401 0 0 0 0 0 0 > 1966 642 518 509 453 0 0 0 0 0 > 1967 505 340 621 458 0 0 0 0 0 > 1968 451 383 428 318 339 0 0 0 0 > >> length (a) > [1] 9 > > I've a questions... > > There is a function for show the lenght of single observation? > >> ???? (a) > [1] 12 > > > > Best Wishes, > > Alfredo > > [[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. ______________________________________________ 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.
