SPAM {spam} | R Documentation |
spam
is a collection of functions for sparse matrix
algebra.
What is spam and what is it not
While Matrix
seems an overshoot of classes and SparseM
focuses mainly on regression type problem, we provide a minimal set of
sparse matrix functions fully functional for everyday spatial statistics
life.
Emphasis is given on a comprehensiv, simple, tutorial structure of the
code. The code is S4 based but (in a tutorial spirit) the functions are
in a S3 structure visible to the user (exported via NAMESPACE).
Sparseness is used when handling large matrices. Hence, care has been used to provide efficient and fast routines. Essentially, the functions do not transform the sparse structure into full matrices to use standard (available) functionality, followed by a back transform. We agree, more operators, functions, etc. should eventually be implemented.
The spatial package fields
uses spam
as a required
package.
Reinhard Furrer
www.mines.edu/~rfurrer/software/spam/
See spam.class
for a detailed class description,
spam
and spam.ops
for creation,
coercion and algebraic operations.
demo(package='spam')
lists available demos.
Related packages are fields
,
Matrix
and
SparseM.ontology
.