The phrase "a sparse sample of" is correct and usable in written English.
It can be used when referring to a limited or insufficient selection of data or examples from a larger set.
Example: "The study was based on a sparse sample of participants, which may affect the reliability of the results."
Alternatives: "a limited selection of" or "a small subset of".
Initially, a sparse sampling of random 20-mer peptide sequence space was screened for low-affinity lead peptides.
In those experiments, objects were represented using a sparse sampling of dots that marked the outer boundary of each object.
However, as we demonstrate below, such a sparse sampling of the values of GDT function compromises the reliability of GDT_ TS.
This was demonstrated in an earlier study from this lab, in which subjects were asked to identify shapes that were displayed with continuous illumination of the dots (not as brief flashes), but where only a sparse sampling of the full inventory of boundary dots was shown [ 10].
High levels of recognition are possible even when those dots are shown for a very brief period of time, when only a sparse sampling of the dots is displayed, and when the dots are shown successively, each for a very brief interval.
This represents a phylogenetically broad, yet sparse, sample of the approximately 110 living species of this avian order.
To assess the pharmacokinetic profile of lumefantrine, a sparse sampling approach will be used with randomized allocation of sampling times (5 per child).
In the present study, we investigated the neural substrate of human motion perception when listening to footsteps, by means of a sparse sampling functional MRI design.
Kohler [1] Previous research has shown that objects can be identified when they are represented using a relatively sparse sampling of dots that mark the outer boundary, similar to a silhouette [2].
Although our data set may seem enormous, we note that it still represents a very sparse sampling of sequence space.
