welch.t.tests: Perform rowwise Welch t-tests.
In AEBilgrau/Bmisc: Biostatistical miscellaneous functions

Description Usage Arguments Details Value Author(s) Examples

This function performs rowwise Welch two-sample t-test in two matrices with the same height in a fast manner.

1	welch.t.tests(x, y)

`x`	A numeric matrix of the values of the first group. Usually the expression matrix of the first group.
`y`	A numeric matrix of the values in the second group with the same number of rows as `x`.

A Welch t-test is performed for each row in x and y. The i'th row of x is tested against the i'th row of y and the result is seen in the i'th row of the output.

A data.frame with the same number of rows as x containing the means, variances, pooled stadard deviations, estimated difference, the standard error of the difference, the t statistic, the degrees of freedom, and the p-values.

Anders Ellern Bilgrau <anders.ellern.bilgrau (at) gmail.com>

# Create some toy data
x <- replicate(10, rnorm(20, 0, 1))
y <- replicate(11, c(rnorm(10, 1, 1), rnorm(10, 0, 1)))
rownames(x) <- rownames(y) <- paste0("Gene", 1:20)

welch.t.tests(x, y)

# To perform a single t test
t.test(x[1,], y[1, ])
welch.t.tests(x[1, , drop = FALSE], y[1, , drop = FALSE])