mstep1 {MetabolAnalyze} | R Documentation |
First M-step of the AECM algorithm when fitting a mixture of PPCA models.
Description
Internal function required for fitting a mixture of PPCA models.
Usage
mstep1(Y, Tau, Pi, mu, g)
Arguments
Y |
A N x p data matrix. |
Tau |
An N x G matrix of posterior group membership probabilities. |
Pi |
A g vector of group probabilities. |
mu |
A p x g matrix containing the mean for each group. |
g |
The number of groups currently being fitted. |
Details
First M-step of the AECM algorithm when fitting a mixture of PPCA models. An internal function.
Value
A list containing
Pi |
A g vector of group probabilities |
Mu |
A p x g matrix each column of which contains a group mean. |
Note
An internal function.
Author(s)
Nyamundanda Gift, Isobel Claire Gormley and Lorraine Brennan
References
Nyamundanda, G., Gormley, I.C. and Brennan, L. (2010) Probabilistic principal components analysis for metabolomic data. Technical report. University College Dublin, Ireland.
See Also
[Package MetabolAnalyze version 1.3.1 Index]