w4m__var_by_rank_or_file: Support function to compute variances of matrix rows or...

In HegemanLab/w4mclassfilter: W4M Class Filter

Description

(w4mclassfilter support function) Compute variances of rows or columns of a W4M data matrix

Usage

w4m__var_by_rank_or_file(m, dim = 1)

Arguments

m	matrix: W4M data matrix for which variance must be computed for rows or columns
dim	integer: For variances of rows, dim == 1, for variances of columns, dim == 2

Value

vector of numeric: variances for rows or columns

Author(s)

Art Eschenlauer, [e-mail]

See Also

https://github.com/HegemanLab/w4mclassfilter

http://stackoverflow.com/a/25100036

Examples

m <- base::matrix(
  c(
    1, 2, 3,
    5, 7, 11,
    13, 17, 19
  )
, nrow = 3
, ncol = 3
, byrow = TRUE
)
rowvars <- w4m__var_by_rank_or_file(m = m, dim = 1)
expecteds <- c(stats::var(c(1,2,3)),stats::var(c(5,7,11)),stats::var(c(13,17,19)))
base::all.equal(rowvars, expecteds)
colvars <- w4m__var_by_rank_or_file(m = m, dim = 2)
expecteds <- c(stats::var(c(1,5,13)),stats::var(c(2,7,17)),stats::var(c(3,11,19)))
base::all.equal(colvars, expecteds)

HegemanLab/w4mclassfilter documentation built on March 14, 2021, 1:19 a.m.