Displaying 2 results from an estimated 2 matches for "major_ord".
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major_order
2009 Sep 11
1
transposing a distance matrix in R
...e, no just put it together:
R> dist <- m[lower.tri(m)]
R> who <- who.vs.who[lower.tri(m),]
R> names(dist) <- paste(who[,1], who[,2], sep=".vs.")
R> dist
B.vs.A C.vs.A C.vs.B
1 0 1
HTH,
-steve
[1] Column major format: http://en.wikipedia.org/wiki/Row-major_order#Column-major_order
--
Steve Lianoglou
Graduate Student: Computational Systems Biology
| Memorial Sloan-Kettering Cancer Center
| Weill Medical College of Cornell University
Contact Info: http://cbio.mskcc.org/~lianos/contact
2013 Dec 06
3
Matrix memory layout R vs. C
Hi everybody,
I'm trying to pass a matrix from R to C, where some computation is done
for performance reasons, and back to R for evaluation. But I've run into
the problem that R and C seem to have different ways of representing the
matrix in main memory. The C representation of a 2D matrix in linear
memory is concatenation of the rows whereas in R, it's a concatenation
of the