object SparseMatrix extends Serializable
Factory methods for org.apache.spark.ml.linalg.SparseMatrix.
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- @Since( "2.0.0" )
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- Matrices.scala
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def
fromCOO(numRows: Int, numCols: Int, entries: Iterable[(Int, Int, Double)]): SparseMatrix
Generate a
SparseMatrix
from Coordinate List (COO) format.Generate a
SparseMatrix
from Coordinate List (COO) format. Input must be an array of (i, j, value) tuples. Entries that have duplicate values of i and j are added together. Tuples where value is equal to zero will be omitted.- numRows
number of rows of the matrix
- numCols
number of columns of the matrix
- entries
Array of (i, j, value) tuples
- returns
The corresponding
SparseMatrix
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- @Since( "2.0.0" )
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def
spdiag(vector: Vector): SparseMatrix
Generate a diagonal matrix in
SparseMatrix
format from the supplied values.Generate a diagonal matrix in
SparseMatrix
format from the supplied values.- vector
a
Vector
that will form the values on the diagonal of the matrix- returns
Square
SparseMatrix
with sizevalues.length
xvalues.length
and non-zerovalues
on the diagonal
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- @Since( "2.0.0" )
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def
speye(n: Int): SparseMatrix
Generate an Identity Matrix in
SparseMatrix
format.Generate an Identity Matrix in
SparseMatrix
format.- n
number of rows and columns of the matrix
- returns
SparseMatrix
with sizen
xn
and values of ones on the diagonal
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- @Since( "2.0.0" )
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def
sprand(numRows: Int, numCols: Int, density: Double, rng: Random): SparseMatrix
Generate a
SparseMatrix
consisting ofi.i.d
.Generate a
SparseMatrix
consisting ofi.i.d
. uniform random numbers. The number of non-zero elements equal the ceiling ofnumRows
xnumCols
xdensity
- numRows
number of rows of the matrix
- numCols
number of columns of the matrix
- density
the desired density for the matrix
- rng
a random number generator
- returns
SparseMatrix
with sizenumRows
xnumCols
and values in U(0, 1)
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- @Since( "2.0.0" )
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def
sprandn(numRows: Int, numCols: Int, density: Double, rng: Random): SparseMatrix
Generate a
SparseMatrix
consisting ofi.i.d
.Generate a
SparseMatrix
consisting ofi.i.d
. gaussian random numbers.- numRows
number of rows of the matrix
- numCols
number of columns of the matrix
- density
the desired density for the matrix
- rng
a random number generator
- returns
SparseMatrix
with sizenumRows
xnumCols
and values in N(0, 1)
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- @Since( "2.0.0" )
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