Dear Mohammad, Take a look at the rollmean function in the zoo package. HTH,
Jorge On Sun, Mar 1, 2009 at 9:29 PM, Mohammad Sabr <mohammad_s...@yahoo.com>wrote: > I am trying to run a loop where I can sum parts of a matrix. For example, I > want at each step in the loop to sum the the next 4-values of a vector. I > tried to do the following but the result were wrong: > > for (i in 4:T) { > data_q[i-3,]=sum(data_m[i-3,]:data_m[i,]) > } > > can anyone please direct me on what should I do to run this loop properly > > Thanks in advance > [[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. > > [[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.