User guide

9-17
9.6.3 Sparse Matrices
ManyGAUSSoperatorsandcommandssupportthesparsematrixdatatype.Youmay
useanyofthefollowingcommandstocreateasparsematrix:
denseToSp
Convertsadensematrixtoasparsematrix.
denseToSpRE
Convertsadensematrixtoasparsematrix,usinga
relativeepsilon.
packedToSp
Createsasparsematrixfromapackedmatrixofnon-
zerovaluesandrowandcolumnindices.
spCreate
Createsasparsematrixfromvectorsofnon-zero
values,rowindices,andcolumnindices.
spEye
Createsasparseidentitymatrix.
spOnes
Generatesasparsematrixcontainingonlyonesand
zeros
spZeros
Createsasparsematrixcontainingnonon-zero
values.
SeeSPARSE MATRICES,CHAPTER13,formoreinformation.
9.6.4 N-dimensional Arrays
ManyGAUSScommandssupportarraysofNdimensions.Thefollowingcommands
maybeusedtocreateandmanipulateanN-dimensionalarray:
aconcat
Concatenateconformablematricesandarraysina
user-specifieddimension.
aeye
CreateanN-dimensionalarrayinwhichtheplanes
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Fundamentals