sparse

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sparse

A sparse matrix (or vector, or array) is one in which most of the elements are zero. If storage space is more important than access speed, it may be preferable to store a sparse matrix as a list of (index, value) pairs or use some kind of hash scheme or associative memory.
References in classic literature ?
That night they camped upon a rocky plateau which was sparsely wooded with jarrah, and here once again they were visited by the weird, nocturnal apparition that had already filled them with a nameless terror.
All that thickly wooded and sparsely tenanted countryside was stiff with a bitter and brittle frost.
The Chi nese theatres across the water made, in the sparsely twinkling masses of gloom an Eastern town pre sents at night, blazing centres of light, and of a distant and howling uproar.
The fact is that I could not believe is possible that the most remarkable horse in England could long remain concealed, especially in so sparsely inhabited a place as the north of Dartmoor.
By means of a folding chair, which was still in its place behind the door, they got to the window and looked out in turn and contemplated a sparsely wooded country below, with no railways nor roads, and only occasional signs of habitation.
Contract notice: SysmEnn sparsely populated area of ?
As the editorial above argues, it makes sense to improve the availability of fuel in Oregon's wide open spaces by approving a bill to allow self-service gas in sparsely populated counties.
As the most rural and sparsely populated district we tend to get the dirty end of the stick when anything is decided in Caernarfon, the county town.
Those filled with: sparsely cross-linked microspheres containing growth factor, highly cross-linked microspheres containing growth factor, sparsely cross-linked microspheres with no growth factor, highly cross-linked microspheres with no growth factor, and a control with no microspheres.
Over January through March, FMD was found in sheep from various villages in the comparatively poor and sparsely populated region.
But it is known as the forgotten temblor because just two people died -- one a Los Angeles man who suffered a heart attack, one a woman killed near Fort Tejon by a collapsing adobe -- in what was then a sparsely populated state.
During the Cold War, mining companies worked tirelessly to extract uranium from parts of the Navajo Nation, home to 180,000 people spread sparsely over parts of Arizona, Utah, and New Mexico.