Leave-one-out cross-validation for a dudi
loocv.dudi.Rd
Leave-one-out cross-validation to check the dispersion of row coordinates in a dudi
.
Arguments
- x
the dudi of the
bca
on which cross-validation should be done- progress
logical to display a progress bar during computations (see the
progress
package)- ...
further arguments passed to or from other methods
Details
This function does a cross-validation of the row coordinates of a dudi. Each row is removed from the table one at a time, and its coordinates are computed by projection of this row in the analysis of the table with the removed row. This can be used to check the sensitivity of an analysis to outliers. The cross-validated and original coordinates can be compared with the s.match
function (see example).
Value
A list with:- XValCoord
:
the cross-validated row coordinates - PRESS
:
the Predicted Residual Error Sum for each row- PRESSTot
:
the sum of PRESS
for each bca
axis