rowcolSumSq: Form Row and Column Sums of Squares

In andreyshabalin/ramwas: Fast Methylome-Wide Association Study Pipeline for Enrichment Platforms

Description

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.

Usage

rowSumsSq(x)
colSumsSq(x)

Arguments

x	Numeric matrix.

Details

The function is implemented in C for better performance.

Value

Return a vector of sums of values in each row/column for matrix x (rowSumsSq/colSumsSq).

Author(s)

Andrey A Shabalin [e-mail]

See Also

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

Examples

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) ))

andreyshabalin/ramwas documentation built on Sept. 27, 2021, 7:25 p.m.