rowSums.dist | R Documentation |
Compute the row (column) sums or means for a sparse symmetric (distance) matrix.
rowSums.dist(x, na.rm = FALSE) rowMeans.dist(x, na.rm = FALSE, diag = TRUE) colSums.dist(x, na.rm = FALSE) colMeans.dist(x, na.rm = FALSE, diag = TRUE)
x |
an object of class |
na.rm |
logical, should missing values (including |
diag |
logical, should the diagonal elements be included in the computation? |
These functions are more efficient than expanding an object of
class dist
to matrix and using rowSums
or rowMeans
.
colSums
and colMeans
are provided for convenience.
However, note that due to symmetry the result is always the
same as for rowSums
or rowMeans
.
A numeric vector of row sums.
Christian Buchta
as.matrix
, as.dist
, and rowSums
.
## x <- matrix(runif(10*2),ncol=2) d <- dist(x) rowSums(as.matrix(d)) rowSums.dist(d) # the same rowMeans(as.matrix(d)) rowMeans.dist(d) # the same rowMeans.dist(d, diag = FALSE) # not the same ## NAs d[3] <- NA rowSums.dist(d, na.rm = TRUE) rowMeans.dist(d, na.rm = TRUE)
Add the following code to your website.
For more information on customizing the embed code, read Embedding Snippets.