


Create descriptor of every clip.
Takes clusters and assigns each cuboid to its type. Next, the cuboid types are
histogrammed to create a descriptor for each clip in each dataset.
INPUTS
DATASETS - array of structs, should have the fields:
.desc - length N cell vector of cuboid descriptors
.ncilps - N: number of clips
clusters - cuboid clusters
csigma - soft assign see clipdesc
OUTPUTS
data - length N cell vector of (nclips x p) arrays of data