Bubble plots in 3-d MDS; (W Australia fish diets)

Another new feature in PRIMER 7 is the ability to construct bubble plots in 3-d ordinations, where the same ‘3-d effect’ representation of bubbles is employed as was seen earlier in 2-d plots – only now, of course, (✓3D effect) is the default. These are reasonably convincing as whole spheres, when the 3-d plot is rotated (as described earlier in this section), though inevitably less so as segmented bubble plots – though the latter plots are also permitted.

To demonstrate bubble plots in a case where a 3-d ordination was necessary, in order to reduce stress to acceptable levels, re-open the WA fish ws workspace used earlier in this section (to show spinning and digital recording of 3-d solutions). On the 3-d nMDS plot, Graph3, create individual bubble plots for the dietary constituents Calanoid and Polychaetes, using the secondary data for which samples have been standardised and then square root transformed (probably Data6).