From what I can see, these are not so much new options, rather a reorganisation in the options that were previously available.
In version 16 of JMP after performing the PCA under the red triangle you could select:
Principle Components>
on Correlations
on Covariances
on Unscaled
The default was 'on correlations' and that makes sense in most circumstances.
In version 17 these 3 options are presented as Standardize options in the PCA dialog:
Standardize
Standardized
Unscaled
Unscaled and uncentered
In fact version 17 still keeps the red triangle option. So for example if you change the Standardized option to Unscaled then in the PCA you will see that the 'on Covariances" option has been selected.
As for the Method Family: in version within the PCA dialog there was an Estimation Option:
- Default
- REML
- ML
- Robust
- Row-wise
- Pairwise
- Wide
- Sparse
In version 17 these accessed via the Method Family option. This shows:
- Default
- Narrow data
- Wide data
But when you select Narrow Data you then see Variance Estimation methods:
- REML
- ML
- Robust
- Row-wise
- Pairwise
and if select Wide Data you see different Variance Estimation methods:
- Fast approximate
- Robust PCA
This has probably been done to allow more sub-options in relation to handling wide-data. These options are new to version 17.
-Dave
