A robustness description. See
robustnessInCompositions for details. The option is currently
not supported. If support is added the default will change to
getOption(robust).
Value
A matrix containing summary statistics.
The value is the same as for the classical summary
summary applied to a closed dataset.
Details
The data is applied a clo operation before the computation.
Note that the statistics obtained will not keep any consistency
if computed with all the parts available or only with a subcomposition.