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Average body mass matrix (B/A)
A useful variation of this, but one which needs more care, is to compute average body mass of eac...
Expressions combining worksheets
Similarly, expressions can combine samples, or even factors (or indicators) on those samples (or ...
Expressions combining variables
For an example of an Expression combining two (or more) variables, use the Clyde environmental sh...
Transform (individual) advanced
Unlike previous versions, in PRIMER 7 the Transform(individual) routine has been moved to a more ...
Ranked resemblances
Ranking is also a menu option when the active sheet is a resemblance (Tools>Rank distance), but i...
Ranked variables
The following section (on PCA) will discuss further the choice of particular transformations to a...
Missing data estimation (Clyde study)
Transformation options for the Clyde environmental matrix, Clyde environment, are discussed in mo...
EM algorithm assumptions
Tools>Missing is designed to operate only on matrices for which: a) assumptions of multivariate n...
Missing data estimation
The subject of missing data has arisen several times already (Sections 1, 3, 5) and the point mad...
Merging non-uniform species lists; (Phuket coral reefs); (Clyde dump-ground study)
Perhaps the greatest benefit of the strict label matching in PRIMER is the ability to Tools>Merge...
Avoiding strict label matching
The best policy to avoid confusion is to use precise, unique species and sample labels (typically...
Tree menu; Check on datasheets & resemblances; Undefined resemblances
The other Tools menu item for aggregation sheets is distinctive to this case, namely Tools>Tree; ...
Check on aggregation files
Use the open aggregation file, Groundfish taxonomy, to show the smaller set of Tools items (Tree,...
Aggregation
So far we have only seen variable information sheets, containing taxonomic (or other) hierarchies...
Average and Sum on data matrices; Average on resemblance matrices
Tools>Average and Sum operate in the same way on data sheets. For example, when (Samples• Average...
Tools vs. Edit menu
Both the Edit (see Section 1) and Tools main menus carry out ‘housekeeping’ manipulations on a da...
SIMPER on (squared) Euclidean (N Sea biomarkers)
Save and close Tasmania ws and, as a last example, open the recently closed N Sea ws workspace. O...
SIMPER on 2-way crossed layout (Tasmania nematodes)
A natural extension to the 1-way SIMPER is to the 2-way crossed design, so re-open the Tasmania w...
Species typifying a group
Earlier in the results window, tables are given of the contributions of each species to the Bray-...
Species dis-criminating two groups (Bristol Ch. zooplankton)
Re-open the Bristol Channel ws workspace from C:\Examples v7\BC zooplankton, for which the shade ...