rowcolSumSq: Form Row and Column Sums of Squares
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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	rowSumsSq(x) colSumsSq(x)

`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 andrey.shabalin@gmail.com

See rowSums and colSums for simple (not squared) row/column sums.

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) ))