I'm looking for a function that allows to sum the elements of an array along a dimension that can be different from the classical ones (rows or columns).
Let's suppose for example that: - A is an array with dimensions 2 x 3 x 4 - I want to compute B, a 2 x 3 matrix with elements equal to the sum of the corrensponding elements on each of the 3 strata. I've tried to use apply(A,3,sum) but the result is a vector, not a matrix. Another solution is a less elegant B=matrix(rep(0,6),ncol=3) for(t in 1:4) B = B + A[ , , t] May anybody help? S -- ------------------------------------------------------------------- Simone Salvadei Faculty of Economics Department of Financial and Economic Studies and Quantitative Methods University of Rome Tor Vergata e-mail: simone.salva...@uniroma2.it <federico.belo...@uniroma2.it> url: http://www.economia.uniroma2.it/phd/econometricsempiricaleconomics/ <http://www.econometrics.it/> ------------------------------------------------------------------- [[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.
