Description Usage Arguments Details Value Author(s) See Also Examples

Form row and column sums of squares for numeric matrices.
The functions are introduced as faster analogs of
`rowSums(x^2)`

and `colSums(x^2)`

calls.

1 2 |

`x` |
Numeric matrix. |

The function is implemented in C for better performance.

Return a vector of sums of values in each row/column for matrix
`x`

(`rowSumsSq`

/`colSumsSq`

).

Andrey A Shabalin [email protected]

See `rowSums`

and `colSums`

for simple (not squared) row/column sums.

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 | ```
x = matrix( 1:99, 9, 11)
# Calculate sums of squared elements in each row
rsum2 = rowSumsSq(x)
# Compare with alternative calculation
stopifnot( all.equal( rsum2, rowSums(x^2) ))
# Calculate sums of squared elements in each column
csum2 = colSumsSq(x)
# Compare with alternative calculation
stopifnot( all.equal( csum2, colSums(x^2) ))
``` |

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