scaleChi.RdScales a matrix, Y, to is standardised chi-square residuals \((o - e) / \sqrt{e}\) (given \(K_n\) and \(R_0\) metrics derived from an external matrix \(Y_0\)) so that further analysis can be unweighted.
scaleChi(Y, Kn, R0, eps = 1e-06)
| Y | a matrix for which standardised chi-square residuals are to be calculated. |
|---|---|
| Kn | the column sums (K) of Y divided by sum(K). |
| R0 | row weights. |
| eps | a tolerance. |
the matrix of standardised chi-squared residuals of Y.
Ter Braak, C.J.F and Schaffers, A.P. (2004) Co-Correspondence Analysis: a new ordination method to relate two community compositions. Ecology 85(3), 834--846
Gavin L. Simpson, based on Matlab code by C.J.F. ter Braak and A.P. Schaffers.
This function is not intended for casual use by users.