R uses column-major ordering of multidimensional arrays, as in Fortran, unlike the row-major ordering of C multidimensional arrays. This is because the numerical linear algebra code used in R is from the Eispack, Linpack, BLAS, Lapack family of Fortran subroutine packages. Even when implementation languages other than Fortran are used, the Fortran storage conventions prevail because they affect the design of algorithms.
Matlab is based on the same code (Matlab began as an interactive wrapper around Eispack and Linpack) and uses the same representation of arrays. On Fri, Nov 21, 2008 at 2:41 AM, Rainer M Krug <[EMAIL PROTECTED]> wrote: > Hi > > I am trying to figure out, if the matlab style of linear indexing of > an array is the same as in R. i.e. > > when > > x <- array( 1:24, dim=c(2,3,4) ) > x[3] >> 3 > > and if the same is true in matlab, assuming that > x[n1,n2,n3] in R returns the same as y(n1,n2,n3) when y is a matrix in > matlab > > I found the following reference > http://www.mathworks.com/access/helpdesk/help/techdoc/index.html?/access/helpdesk/help/techdoc/matlab_prog/f1-86528.html#f1-86846 > > And it seems to be the same, but another source says it is different. > Could somebody confirm, if it is the same? > > Thanks, > > Rainer > > > -- > Rainer M. Krug, PhD (Conservation Ecology, SUN), MSc (Conservation > Biology, UCT), Dipl. Phys. (Germany) > > Centre of Excellence for Invasion Biology > Faculty of Science > Natural Sciences Building > Private Bag X1 > University of Stellenbosch > Matieland 7602 > South Africa > > ______________________________________________ > 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.
