[R] Principal Components for matrices with NA

Mark Difford mark_difford at yahoo.co.uk
Tue Feb 28 07:43:45 CET 2012

On Feb 27, 2012 at 9:30pm Joyous Fisher wrote:

> Q: is there a way to do princomp or another method where every row has at 
> least one missing column?

You have several options. Try function nipals in packages ade4 and plspm.
Also look at package pcaMethods (on Bioconductor), where you will find a
full range of options for carrying out principal component analysis using
matrices with missing values.

Regards, Mark.

Mark Difford (Ph.D.)
Research Associate
Botany Department
Nelson Mandela Metropolitan University
Port Elizabeth, South Africa
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