Thank you Greg I will likely go with a list of data frames as each data frame will represent independent entities and as the syntax will probably be better that way.
I did find it puzzling that multidimensional data frame or the ability to hold a vector in a cell of a data frame was not added in a 3rd party package if not the core. I will find a way to work around this though. Best, Umut On Thu, Oct 17, 2013 at 7:46 PM, Greg Snow <538...@gmail.com> wrote: > If all your data is numeric then you can use an array instead of a data > frame and arrays can easily be 3, 4, or higher dimensional. Or you can use > a data frame with a column each for x, y, z, and time; with possible other > columns representing groups or other attributes, essentially a 3 dimensional > data frame with the 3rd dimension being stacked rather than projecting out. > > > On Thu, Oct 17, 2013 at 6:59 AM, Umut Toprak <umut.top...@unige.ch> wrote: >> >> Dear all, >> >> I have a problem where I must represent points with XYZ coordinates >> changing over time. I will do a number of operations on this data such as >> calculating the YZ-projection distance of the points to the origin over >> time, the frequency spectrum of the X-T data etc. I am trying to find a >> good way of representing this data with an appropriate data structure. >> >> It appears like higher-dimensional data frames are not allowed and I do >> not >> know if I should use a list of data frames or if there is a better >> solution, possibly as part of an external package. >> >> Thank you for your time >> Umut Toprak >> >> [[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. > > > > > -- > Gregory (Greg) L. Snow Ph.D. > 538...@gmail.com ______________________________________________ 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.
