- Specify PCA type.
<ul> 
<li>1 - Standard</li>
<li> 2 - Expectation Maximization</li>
	<li> 3 - SVD</li>

</ul>
</li>

<li>
pca_opts - Optional parameters for PCA.</li>

<ul> 

<li>
	Standard PCA:</li>

<ul> 

<li> pca_opts.stack_data - Options are as follows:</li>

<ul> 
<li>'Yes' - Data sets are stacked to compute covariance matrix.
This option assumes that there is enough RAM to stack the data sets and for computing the covariance matrix.
Full storage of covariance matrix is used