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Other variable weighting

PRIMER v7: User Manual / Tutorial 4. Pre-treatment options

There are other cases in which variables (species) might need prior weighting, e.g. when a specie...

Updated 5 months ago by Abby Miller

(Fal estuary copepods)

PRIMER v7: User Manual / Tutorial 4. Pre-treatment options

Sediment copepod assemblages (and other fauna) from five creeks of the Fal estuary, SW England, w...

Updated 5 months ago by Abby Miller

Dispersion weighting of species

PRIMER v7: User Manual / Tutorial 4. Pre-treatment options

When variables are on different measurement scales, there is little viable alternative to normali...

Updated 5 months ago by Abby Miller

Normalising variables

PRIMER v7: User Manual / Tutorial 4. Pre-treatment options

It is typical of a suite of physico-chemical variables (or biomarkers, water-quality indices etc....

Updated 5 months ago by Abby Miller

Transforming (individual)

PRIMER v7: User Manual / Tutorial 4. Pre-treatment options

Both the Draftsman and Histogram Plots show that several of the Ekofisk abiotic variables are hig...

Updated 5 months ago by Abby Miller

Draftsman, histogram & multi-plots

PRIMER v7: User Manual / Tutorial 4. Pre-treatment options

Temporarily deselect the Distance (as in Section 3), and run Plots>Draftsman Plot on the other 9 ...

Updated 5 months ago by Abby Miller

Transforming abiotic variables

PRIMER v7: User Manual / Tutorial 4. Pre-treatment options

Transformations may be appropriate for environmental variables too, though usually for a differen...

Updated 5 months ago by Abby Miller

Shade plots to aid choice of transform

PRIMER v7: User Manual / Tutorial 4. Pre-treatment options

A major new feature in PRIMER 7 is the large number of additional plotting routines, one of the c...

Updated 5 months ago by Abby Miller

A2 References

PERMANOVA+ for PRIMER: Guide to Softwar... Appendices

Akaike (1973) Akaike H. 1973. ‘Information theory as an extension of the maximum l...

Updated 5 months ago by Arden

Transforming (overall)

PRIMER v7: User Manual / Tutorial 4. Pre-treatment options

Transformation is usually applied to all the entries in an assemblage matrix of counts, biomass, ...

Updated 5 months ago by Abby Miller

Standardising species

PRIMER v7: User Manual / Tutorial 4. Pre-treatment options

Pre-treatment>Standardise can also be used to standardise the matrix on the variables axis, e.g. ...

Updated 5 months ago by Abby Miller

Stats to worksheet

PRIMER v7: User Manual / Tutorial 4. Pre-treatment options

Several of the routines in PRIMER 7 also incorporate a check box for sending summary statistics u...

Updated 5 months ago by Abby Miller

Selection in resemblance matrices

PRIMER v7: User Manual / Tutorial 3. Highlighting and selection (Select)

Looking ahead to Section 5, when the active window is a (triangular) resemblance matrix, selectio...

Updated 5 months ago by Abby Miller

Selecting by ‘most important’

PRIMER v7: User Manual / Tutorial 3. Highlighting and selection (Select)

There are, however, three other selection methods under Select>Variables that are specific to sel...

Updated 5 months ago by Abby Miller

Selecting variables

PRIMER v7: User Manual / Tutorial 3. Highlighting and selection (Select)

Any of the options for selecting samples are also available for selecting variables, e.g. selecti...

Updated 5 months ago by Abby Miller

Selecting by number and non-missing

PRIMER v7: User Manual / Tutorial 3. Highlighting and selection (Select)

It may sometimes be easier to use the sample numbers, here Select>Samples>•Sample numbers> 1,2,5,...

Updated 5 months ago by Abby Miller

Multiple selections

PRIMER v7: User Manual / Tutorial 3. Highlighting and selection (Select)

It is important to note the effect of this second selection on WA fish diets %vol; it produces a ...

Updated 5 months ago by Abby Miller

Selecting by factor levels

PRIMER v7: User Manual / Tutorial 3. Highlighting and selection (Select)

The highlighting route to selection can be bypassed altogether using the other options on the Sel...

Updated 5 months ago by Abby Miller

Selecting & deselecting highlights

PRIMER v7: User Manual / Tutorial 3. Highlighting and selection (Select)

When all except columns A9, B3 and B4 are highlighted, take Select>Highlighted. Alternatively, ri...

Updated 5 months ago by Abby Miller

Summary Statistics

PRIMER v7: User Manual / Tutorial 3. Highlighting and selection (Select)

File>Open>Filename: WA fish diets %vol, and examine the factors sheet with Edit>Factors. The samp...

Updated 5 months ago by Abby Miller