This has already been investigated intensively by [ 31] who showed that in certain situations (sparse graphs, faithfulness assumption etc).
The PDFs for certain objects have sparse distribution while for others they are densely distributed.
In fact, our vocabularies for certain domains are sparse, crude, abstract and ambiguous, even for concrete domains central to our existence, faces, space, and action.
However, Chen and Jovanis [4] determined that analyzing large dimensional datasets using traditional statistical techniques may result in certain problems such as sparse data in large contingency tables.
Event (i.e., accident) data for certain mitigation options are sparse, making alternative analytical approaches, such as estimating expected damage, difficult (e.g., Ha-Duong and Loisel 2010).
Clustering of HSDPs in certain study areas and sparse concentrations of services per 10 000 population in others, indicate the need to relocate or more rationally allocate services, and further emphasize the value of facility mapping for decision-making.
Randomised controlled trials (RCTs) of CAM in headache management are sparse and for certain modalities there are no RCTs published in the literature.
CS allows to sense a signal in a low-dimensional form, however, for this purpose, the captured signal is required to be sparse in a certain domain[14, 15].
Compressive sensing (CS) enables reconstructing a signal that is sparse in a certain domain from its measurements obtained at a rate significantly lower than the Nyquist frequency[1].
