comp_std_residuals: Compute Standardized Residuals

In VingronLab/APL: Association Plots

Compute Standardized Residuals

Description

'comp_std_residuals' computes the standardized residual matrix S based on the Poisson model, which is the basis for correspondence analysis and serves as input for singular value decomposition (SVD).

Usage

comp_std_residuals(mat, clip = FALSE, cutoff = NULL)

Arguments

mat	A numerical matrix or coercible to one by 'as.matrix()'. Should have row and column names.
clip	logical. Whether residuals should be clipped if they are higher/lower than a specified cutoff
cutoff	numeric. Residuals that are larger than cutoff or lower than -cutoff are clipped to cutoff.

Details

Calculates standardized residual matrix S from the proportion matrix P and the expected values E according to S = \frac{(P-E)}{sqrt(E)}.

Value

A named list. The elements are:

• "S": standardized residual matrix.

• "tot": grand total of the original matrix.

• "rowm": row masses.

• "colm": column masses.

VingronLab/APL documentation built on Nov. 9, 2024, 5:33 p.m.