cern.colt.matrix.tlong.impl.SparseCCLongMatrix2D Maven / Gradle / Ivy
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/*
Copyright (C) 1999 CERN - European Organization for Nuclear Research.
Permission to use, copy, modify, distribute and sell this software and its documentation for any purpose
is hereby granted without fee, provided that the above copyright notice appear in all copies and
that both that copyright notice and this permission notice appear in supporting documentation.
CERN makes no representations about the suitability of this software for any purpose.
It is provided "as is" without expressed or implied warranty.
*/
package cern.colt.matrix.tlong.impl;
import java.util.Arrays;
import java.util.concurrent.Future;
import cern.colt.list.tint.IntArrayList;
import cern.colt.list.tlong.LongArrayList;
import cern.colt.matrix.tlong.LongMatrix1D;
import cern.colt.matrix.tlong.LongMatrix2D;
import edu.emory.mathcs.utils.ConcurrencyUtils;
/**
* Sparse column-compressed 2-d matrix holding long elements. First see
* the package summary and javadoc tree view to get the broad picture.
*
* Implementation:
*
* Internally uses the standard sparse column-compressed format.
* Note that this implementation is not synchronized.
*
* Cells that
*
* - are never set to non-zero values do not use any memory.
*
- switch from zero to non-zero state do use memory.
*
- switch back from non-zero to zero state also do use memory. Their memory
* is not automatically reclaimed. Reclamation can be triggered via
* {@link #trimToSize()}.
*
*
* Time complexity:
*
* Getting a cell value takes time O(log nzr) where nzr is the
* number of non-zeros of the touched row. This is usually quick, because
* typically there are only few nonzeros per row. So, in practice, get has
* expected constant time. Setting a cell value takes worst-case
* time O(nz) where nzr is the total number of non-zeros in
* the matrix. This can be extremely slow, but if you traverse coordinates
* properly (i.e. upwards), each write is done much quicker:
*
*
*
*
* // rather quick
* matrix.assign(0);
* for (int column = 0; column < columns; column++) {
* for (int row = 0; row < rows; row++) {
* if (someCondition)
* matrix.setQuick(row, column, someValue);
* }
* }
*
* // poor
* matrix.assign(0);
* for (int column = columns; --column >= 0;) {
* for (int row = rows; --row >= 0;) {
* if (someCondition)
* matrix.setQuick(row, column, someValue);
* }
* }
*
*
*
*
* If for whatever reasons you can't iterate properly, consider to create an
* empty dense matrix, store your non-zeros in it, then call
* sparse.assign(dense). Under the circumstances, this is still rather
* quick.
*
* Fast iteration over non-zeros can be done via {@link #forEachNonZero}, which
* supplies your function with row, column and value of each nonzero. Although
* the internally implemented version is a bit more sophisticated, here is how a
* quite efficient user-level matrix-vector multiplication could look like:
*
*
*
*
* // Linear algebraic y = A * x
* A.forEachNonZero(new cern.colt.function.IntIntLongFunction() {
* public long apply(int row, int column, long value) {
* y.setQuick(row, y.getQuick(row) + value * x.getQuick(column));
* return value;
* }
* });
*
*
*
*
*
* Here is how a a quite efficient user-level combined scaling operation could
* look like:
*
*
*
*
* // Elementwise A = A + alpha*B
* B.forEachNonZero(new cern.colt.function.IntIntLongFunction() {
* public long apply(int row, int column, long value) {
* A.setQuick(row, column, A.getQuick(row, column) + alpha * value);
* return value;
* }
* });
*
*
*
*
* Method
* {@link #assign(LongMatrix2D,cern.colt.function.tlong.LongLongFunction)} does
* just that if you supply
* {@link cern.jet.math.tlong.LongFunctions#plusMultSecond} as argument.
*
*
* @author Piotr Wendykier
*
*/
public class SparseCCLongMatrix2D extends WrapperLongMatrix2D {
private static final long serialVersionUID = 1L;
/*
* Internal storage.
*/
protected int[] columnPointers;
protected int[] rowIndexes;
protected long[] values;
protected boolean rowIndexesSorted = false;
/**
* Constructs a matrix with a copy of the given values. values is
* required to have the form values[row][column] and have exactly
* the same number of columns in every row.
*
* The values are copied. So subsequent changes in values are not
* reflected in the matrix, and vice-versa.
*
* @param values
* The values to be filled into the new matrix.
* @throws IllegalArgumentException
* if
* for any 1 <= row < values.length: values[row].length != values[row-1].length
* .
*/
public SparseCCLongMatrix2D(long[][] values) {
this(values.length, values[0].length);
assign(values);
}
/**
* Constructs a matrix with a given number of rows and columns. All entries
* are initially 0.
*
* @param rows
* the number of rows the matrix shall have.
* @param columns
* the number of columns the matrix shall have.
* @throws IllegalArgumentException
* if rows<0 || columns<0 .
*/
public SparseCCLongMatrix2D(int rows, int columns) {
this(rows, columns, (int) Math.min(10l * rows, Integer.MAX_VALUE));
}
/**
* Constructs a matrix with a given number of rows and columns. All entries
* are initially 0.
*
* @param rows
* the number of rows the matrix shall have.
* @param columns
* the number of columns the matrix shall have.
* @param nzmax
* maximum number of nonzero elements
* @throws IllegalArgumentException
* if rows<0 || columns<0 .
*/
public SparseCCLongMatrix2D(int rows, int columns, int nzmax) {
super(null);
try {
setUp(rows, columns);
} catch (IllegalArgumentException exc) { // we can hold rows*columns>Integer.MAX_VALUE cells !
if (!"matrix too large".equals(exc.getMessage()))
throw exc;
}
rowIndexes = new int[nzmax];
values = new long[nzmax];
columnPointers = new int[columns + 1];
}
/**
* Constructs a matrix with indexes given in the coordinate format and a
* single value.
*
* @param rows
* the number of rows the matrix shall have.
* @param columns
* the number of columns the matrix shall have.
* @param rowIndexes
* row indexes
* @param columnIndexes
* column indexes
* @param value
* numerical value
* @param removeDuplicates
* if true, then duplicates (if any) are removed
* @param sortRowIndexes
* if true, then row indexes are sorted
*/
public SparseCCLongMatrix2D(int rows, int columns, int[] rowIndexes, int[] columnIndexes, long value,
boolean removeDuplicates, boolean sortRowIndexes) {
super(null);
try {
setUp(rows, columns);
} catch (IllegalArgumentException exc) { // we can hold rows*columns>Integer.MAX_VALUE cells !
if (!"matrix too large".equals(exc.getMessage()))
throw exc;
}
if (rowIndexes.length != columnIndexes.length) {
throw new IllegalArgumentException("rowIndexes.length != columnIndexes.length");
}
if (value == 0) {
throw new IllegalArgumentException("value cannot be 0");
}
int nz = Math.max(rowIndexes.length, 1);
this.rowIndexes = new int[nz];
this.values = new long[nz];
this.columnPointers = new int[columns + 1];
int[] w = new int[columns];
int r;
for (int k = 0; k < nz; k++) {
w[columnIndexes[k]]++;
}
cumsum(this.columnPointers, w, columns);
for (int k = 0; k < nz; k++) {
this.rowIndexes[r = w[columnIndexes[k]]++] = rowIndexes[k];
this.values[r] = value;
}
if (removeDuplicates) {
removeDuplicates();
}
if (sortRowIndexes) {
sortRowIndexes();
}
}
/**
* Constructs a matrix with indexes and values given in the coordinate
* format.
*
* @param rows
* the number of rows the matrix shall have.
* @param columns
* the number of columns the matrix shall have.
* @param rowIndexes
* row indexes
* @param columnIndexes
* column indexes
* @param values
* numerical values
* @param removeDuplicates
* if true, then duplicates (if any) are removed
* @param removeZeroes
* if true, then zeroes (if any) are removed
* @param sortRowIndexes
* if true, then row indexes are sorted
*/
public SparseCCLongMatrix2D(int rows, int columns, int[] rowIndexes, int[] columnIndexes, long[] values,
boolean removeDuplicates, boolean removeZeroes, boolean sortRowIndexes) {
super(null);
try {
setUp(rows, columns);
} catch (IllegalArgumentException exc) { // we can hold rows*columns>Integer.MAX_VALUE cells !
if (!"matrix too large".equals(exc.getMessage()))
throw exc;
}
if (rowIndexes.length != columnIndexes.length) {
throw new IllegalArgumentException("rowIndexes.length != columnIndexes.length");
} else if (rowIndexes.length != values.length) {
throw new IllegalArgumentException("rowIndexes.length != values.length");
}
int nz = Math.max(rowIndexes.length, 1);
this.rowIndexes = new int[nz];
this.values = new long[nz];
this.columnPointers = new int[columns + 1];
int[] w = new int[columns];
int r;
for (int k = 0; k < nz; k++) {
w[columnIndexes[k]]++;
}
cumsum(this.columnPointers, w, columns);
for (int k = 0; k < nz; k++) {
this.rowIndexes[r = w[columnIndexes[k]]++] = rowIndexes[k];
this.values[r] = values[k];
}
if (removeDuplicates) {
removeDuplicates();
}
if (sortRowIndexes) {
sortRowIndexes();
}
}
public LongMatrix2D assign(final cern.colt.function.tlong.LongFunction function) {
if (function instanceof cern.jet.math.tlong.LongMult) { // x[i] = mult*x[i]
final long alpha = ((cern.jet.math.tlong.LongMult) function).multiplicator;
if (alpha == 1)
return this;
if (alpha == 0)
return assign(0);
if (alpha != alpha)
return assign(alpha); // the funny definition of isNaN(). This should better not happen.
final long[] valuesE = values;
int nz = cardinality();
for (int j = 0; j < nz; j++) {
valuesE[j] *= alpha;
}
} else {
forEachNonZero(new cern.colt.function.tlong.IntIntLongFunction() {
public long apply(int i, int j, long value) {
return function.apply(value);
}
});
}
return this;
}
public LongMatrix2D assign(long value) {
if (value == 0) {
Arrays.fill(rowIndexes, 0);
Arrays.fill(columnPointers, 0);
Arrays.fill(values, 0);
} else {
int nnz = cardinality();
for (int i = 0; i < nnz; i++) {
values[i] = value;
}
}
return this;
}
public LongMatrix2D assign(LongMatrix2D source) {
if (source == this)
return this; // nothing to do
checkShape(source);
if (source instanceof SparseCCLongMatrix2D) {
SparseCCLongMatrix2D other = (SparseCCLongMatrix2D) source;
System.arraycopy(other.getColumnPointers(), 0, columnPointers, 0, columns + 1);
int nzmax = other.getRowIndexes().length;
if (rowIndexes.length < nzmax) {
rowIndexes = new int[nzmax];
values = new long[nzmax];
}
System.arraycopy(other.getRowIndexes(), 0, rowIndexes, 0, nzmax);
System.arraycopy(other.getValues(), 0, values, 0, nzmax);
rowIndexesSorted = other.rowIndexesSorted;
} else if (source instanceof SparseRCLongMatrix2D) {
SparseRCLongMatrix2D other = ((SparseRCLongMatrix2D) source).getTranspose();
columnPointers = other.getRowPointers();
rowIndexes = other.getColumnIndexes();
values = other.getValues();
rowIndexesSorted = true;
} else {
assign(0);
source.forEachNonZero(new cern.colt.function.tlong.IntIntLongFunction() {
public long apply(int i, int j, long value) {
setQuick(i, j, value);
return value;
}
});
}
return this;
}
public LongMatrix2D assign(final LongMatrix2D y, cern.colt.function.tlong.LongLongFunction function) {
checkShape(y);
if ((y instanceof SparseCCLongMatrix2D) && (function == cern.jet.math.tlong.LongFunctions.plus)) { // x[i] = x[i] + y[i]
SparseCCLongMatrix2D yy = (SparseCCLongMatrix2D) y;
int p, j, nz = 0, anz;
int Cp[], Ci[], Bp[], m, n, bnz, w[];
long x[], Cx[];
m = rows;
anz = columnPointers[columns];
n = yy.columns;
Bp = yy.columnPointers;
bnz = Bp[n];
w = new int[m]; /* get workspace */
x = new long[m]; /* get workspace */
SparseCCLongMatrix2D C = new SparseCCLongMatrix2D(m, n, anz + bnz); /* allocate result*/
Cp = C.columnPointers;
Ci = C.rowIndexes;
Cx = C.values;
for (j = 0; j < n; j++) {
Cp[j] = nz; /* column j of C starts here */
nz = scatter(this, j, 1, w, x, j + 1, C, nz); /* alpha*A(:,j)*/
nz = scatter(yy, j, 1, w, x, j + 1, C, nz); /* beta*B(:,j) */
for (p = Cp[j]; p < nz; p++)
Cx[p] = x[Ci[p]];
}
Cp[n] = nz; /* finalize the last column of C */
rowIndexes = Ci;
columnPointers = Cp;
values = Cx;
return this;
}
if (function instanceof cern.jet.math.tlong.LongPlusMultSecond) { // x[i] = x[i] + alpha*y[i]
final long alpha = ((cern.jet.math.tlong.LongPlusMultSecond) function).multiplicator;
if (alpha == 0)
return this; // nothing to do
y.forEachNonZero(new cern.colt.function.tlong.IntIntLongFunction() {
public long apply(int i, int j, long value) {
setQuick(i, j, getQuick(i, j) + alpha * value);
return value;
}
});
return this;
}
if (function instanceof cern.jet.math.tlong.LongPlusMultFirst) { // x[i] = alpha*x[i] + y[i]
final long alpha = ((cern.jet.math.tlong.LongPlusMultFirst) function).multiplicator;
if (alpha == 0)
return assign(y);
y.forEachNonZero(new cern.colt.function.tlong.IntIntLongFunction() {
public long apply(int i, int j, long value) {
setQuick(i, j, alpha * getQuick(i, j) + value);
return value;
}
});
return this;
}
if (function == cern.jet.math.tlong.LongFunctions.mult) { // x[i] = x[i] * y[i]
final int[] rowIndexesA = rowIndexes;
final int[] columnPointersA = columnPointers;
final long[] valuesA = values;
for (int j = columns; --j >= 0;) {
int low = columnPointersA[j];
for (int k = columnPointersA[j + 1]; --k >= low;) {
int i = rowIndexesA[k];
valuesA[k] *= y.getQuick(i, j);
if (valuesA[k] == 0)
remove(i, j);
}
}
return this;
}
if (function == cern.jet.math.tlong.LongFunctions.div) { // x[i] = x[i] / y[i]
final int[] rowIndexesA = rowIndexes;
final int[] columnPointersA = columnPointers;
final long[] valuesA = values;
for (int j = columns; --j >= 0;) {
int low = columnPointersA[j];
for (int k = columnPointersA[j + 1]; --k >= low;) {
int i = rowIndexesA[k];
valuesA[k] /= y.getQuick(i, j);
if (valuesA[k] == 0)
remove(i, j);
}
}
return this;
}
return super.assign(y, function);
}
public int cardinality() {
return columnPointers[columns];
}
public LongMatrix2D forEachNonZero(final cern.colt.function.tlong.IntIntLongFunction function) {
final int[] rowIndexesA = rowIndexes;
final int[] columnPointersA = columnPointers;
final long[] valuesA = values;
for (int j = columns; --j >= 0;) {
int low = columnPointersA[j];
for (int k = columnPointersA[j + 1]; --k >= low;) {
int i = rowIndexesA[k];
long value = valuesA[k];
long r = function.apply(i, j, value);
valuesA[k] = r;
}
}
return this;
}
/**
* Returns column pointers
*
* @return column pointers
*/
public int[] getColumnPointers() {
return columnPointers;
}
/**
* Returns a new matrix that has the same elements as this matrix, but is in
* a dense form. This method creates a new object (not a view), so changes
* in the returned matrix are NOT reflected in this matrix.
*
* @return this matrix in a dense form
*/
public DenseLongMatrix2D getDense() {
final DenseLongMatrix2D dense = new DenseLongMatrix2D(rows, columns);
forEachNonZero(new cern.colt.function.tlong.IntIntLongFunction() {
public long apply(int i, int j, long value) {
dense.setQuick(i, j, getQuick(i, j));
return value;
}
});
return dense;
}
public synchronized long getQuick(int row, int column) {
// int k = cern.colt.Sorting.binarySearchFromTo(dcs.i, row, dcs.p[column], dcs.p[column + 1] - 1);
int k = searchFromTo(rowIndexes, row, columnPointers[column], columnPointers[column + 1] - 1);
long v = 0;
if (k >= 0)
v = values[k];
return v;
}
/**
* Returns a new matrix that has the same elements as this matrix, but is in
* a row-compressed form. This method creates a new object (not a view), so
* changes in the returned matrix are NOT reflected in this matrix.
*
* @return this matrix in a row-compressed form
*/
public SparseRCLongMatrix2D getRowCompressed() {
SparseCCLongMatrix2D tr = getTranspose();
SparseRCLongMatrix2D rc = new SparseRCLongMatrix2D(rows, columns);
rc.columnIndexes = tr.rowIndexes;
rc.rowPointers = tr.columnPointers;
rc.values = tr.values;
rc.columnIndexesSorted = true;
return rc;
}
/**
* Returns row indexes;
*
* @return row indexes
*/
public int[] getRowIndexes() {
return rowIndexes;
}
/**
* Returns a new matrix that is the transpose of this matrix. This method
* creates a new object (not a view), so changes in the returned matrix are
* NOT reflected in this matrix.
*
* @return the transpose of this matrix
*/
public SparseCCLongMatrix2D getTranspose() {
int p, q, j, Cp[], Ci[], n, m, Ap[], Ai[], w[];
long Cx[], Ax[];
m = rows;
n = columns;
Ap = columnPointers;
Ai = rowIndexes;
Ax = values;
SparseCCLongMatrix2D C = new SparseCCLongMatrix2D(columns, rows, Ai.length); /* allocate result */
w = new int[m]; /* get workspace */
Cp = C.columnPointers;
Ci = C.rowIndexes;
Cx = C.values;
for (p = 0; p < Ap[n]; p++)
w[Ai[p]]++; /* row counts */
cumsum(Cp, w, m); /* row pointers */
for (j = 0; j < n; j++) {
for (p = Ap[j]; p < Ap[j + 1]; p++) {
Ci[q = w[Ai[p]]++] = j; /* place A(i,j) as entry C(j,i) */
Cx[q] = Ax[p];
}
}
return C;
}
/**
* Returns numerical values
*
* @return numerical values
*/
public long[] getValues() {
return values;
}
/**
* Returns true if row indexes are sorted, false otherwise
*
* @return true if row indexes are sorted, false otherwise
*/
public boolean hasRowIndexesSorted() {
return rowIndexesSorted;
}
public LongMatrix2D like(int rows, int columns) {
return new SparseCCLongMatrix2D(rows, columns);
}
public LongMatrix1D like1D(int size) {
return new SparseLongMatrix1D(size);
}
public synchronized void setQuick(int row, int column, long value) {
// int k = cern.colt.Sorting.binarySearchFromTo(dcs.i, row, dcs.p[column], dcs.p[column + 1] - 1);
int k = searchFromTo(rowIndexes, row, columnPointers[column], columnPointers[column + 1] - 1);
if (k >= 0) { // found
if (value == 0)
remove(column, k);
else
values[k] = value;
return;
}
if (value != 0) {
k = -k - 1;
insert(row, column, k, value);
}
}
/**
* Sorts row indexes
*/
public void sortRowIndexes() {
SparseCCLongMatrix2D tr = getTranspose();
tr = tr.getTranspose();
columnPointers = tr.columnPointers;
rowIndexes = tr.rowIndexes;
values = tr.values;
rowIndexesSorted = true;
}
/**
* Removes (sums) duplicate entries (if any}
*/
public void removeDuplicates() {
int i, j, p, q, nz = 0, n, m, Ap[], Ai[], w[];
long Ax[];
/* check inputs */
m = rows;
n = columns;
Ap = columnPointers;
Ai = rowIndexes;
Ax = values;
w = new int[m]; /* get workspace */
for (i = 0; i < m; i++)
w[i] = -1; /* row i not yet seen */
for (j = 0; j < n; j++) {
q = nz; /* column j will start at q */
for (p = Ap[j]; p < Ap[j + 1]; p++) {
i = Ai[p]; /* A(i,j) is nonzero */
if (w[i] >= q) {
Ax[w[i]] += Ax[p]; /* A(i,j) is a duplicate */
} else {
w[i] = nz; /* record where row i occurs */
Ai[nz] = i; /* keep A(i,j) */
Ax[nz++] = Ax[p];
}
}
Ap[j] = q; /* record start of column j */
}
Ap[n] = nz; /* finalize A */
}
/**
* Removes zero entries (if any)
*/
public void removeZeroes() {
int j, p, nz = 0, n, Ap[], Ai[];
long Ax[];
n = columns;
Ap = columnPointers;
Ai = rowIndexes;
Ax = values;
for (j = 0; j < n; j++) {
p = Ap[j]; /* get current location of col j */
Ap[j] = nz; /* record new location of col j */
for (; p < Ap[j + 1]; p++) {
if (Ax[p] != 0) {
Ax[nz] = Ax[p]; /* keep A(i,j) */
Ai[nz++] = Ai[p];
}
}
}
Ap[n] = nz; /* finalize A */
}
public void trimToSize() {
realloc(0);
}
public String toString() {
StringBuilder builder = new StringBuilder();
builder.append(rows).append(" x ").append(columns).append(" sparse matrix, nnz = ").append(cardinality())
.append('\n');
for (int i = 0; i < columns; i++) {
int high = columnPointers[i + 1];
for (int j = columnPointers[i]; j < high; j++) {
builder.append('(').append(rowIndexes[j]).append(',').append(i).append(')').append('\t').append(
values[j]).append('\n');
}
}
return builder.toString();
}
public LongMatrix1D zMult(LongMatrix1D y, LongMatrix1D z, final long alpha, final long beta,
final boolean transposeA) {
final int rowsA = transposeA ? columns : rows;
final int columnsA = transposeA ? rows : columns;
boolean ignore = (z == null || transposeA);
if (z == null)
z = new DenseLongMatrix1D(rowsA);
if (!(y instanceof DenseLongMatrix1D && z instanceof DenseLongMatrix1D)) {
return super.zMult(y, z, alpha, beta, transposeA);
}
if (columnsA != y.size() || rowsA > z.size())
throw new IllegalArgumentException("Incompatible args: "
+ ((transposeA ? viewDice() : this).toStringShort()) + ", " + y.toStringShort() + ", "
+ z.toStringShort());
DenseLongMatrix1D zz = (DenseLongMatrix1D) z;
final long[] elementsZ = zz.elements;
final int strideZ = zz.stride();
final int zeroZ = (int) zz.index(0);
DenseLongMatrix1D yy = (DenseLongMatrix1D) y;
final long[] elementsY = yy.elements;
final int strideY = yy.stride();
final int zeroY = (int) yy.index(0);
final int[] rowIndexesA = rowIndexes;
final int[] columnPointersA = columnPointers;
final long[] valuesA = values;
int zidx = zeroZ;
int nthreads = ConcurrencyUtils.getNumberOfThreads();
if (!transposeA) {
if ((!ignore) && (beta != 1)) {
z.assign(cern.jet.math.tlong.LongFunctions.mult(beta));
}
if ((nthreads > 1) && (cardinality() >= ConcurrencyUtils.getThreadsBeginN_2D())) {
nthreads = 2;
Future[] futures = new Future[nthreads];
final long[] result = new long[rowsA];
int k = columns / nthreads;
for (int j = 0; j < nthreads; j++) {
final int firstColumn = j * k;
final int lastColumn = (j == nthreads - 1) ? columns : firstColumn + k;
final int threadID = j;
futures[j] = ConcurrencyUtils.submit(new Runnable() {
public void run() {
if (threadID == 0) {
for (int i = firstColumn; i < lastColumn; i++) {
int high = columnPointersA[i + 1];
long yElem = elementsY[zeroY + strideY * i];
for (int k = columnPointersA[i]; k < high; k++) {
int j = rowIndexesA[k];
elementsZ[zeroZ + strideZ * j] += alpha * valuesA[k] * yElem;
}
}
} else {
for (int i = firstColumn; i < lastColumn; i++) {
int high = columnPointersA[i + 1];
long yElem = elementsY[zeroY + strideY * i];
for (int k = columnPointersA[i]; k < high; k++) {
int j = rowIndexesA[k];
result[j] += alpha * valuesA[k] * yElem;
}
}
}
}
});
}
ConcurrencyUtils.waitForCompletion(futures);
int rem = rowsA % 10;
for (int j = rem; j < rowsA; j += 10) {
elementsZ[zeroZ + j * strideZ] += result[j];
elementsZ[zeroZ + (j + 1) * strideZ] += result[j + 1];
elementsZ[zeroZ + (j + 2) * strideZ] += result[j + 2];
elementsZ[zeroZ + (j + 3) * strideZ] += result[j + 3];
elementsZ[zeroZ + (j + 4) * strideZ] += result[j + 4];
elementsZ[zeroZ + (j + 5) * strideZ] += result[j + 5];
elementsZ[zeroZ + (j + 6) * strideZ] += result[j + 6];
elementsZ[zeroZ + (j + 7) * strideZ] += result[j + 7];
elementsZ[zeroZ + (j + 8) * strideZ] += result[j + 8];
elementsZ[zeroZ + (j + 9) * strideZ] += result[j + 9];
}
for (int j = 0; j < rem; j++) {
elementsZ[zeroZ + j * strideZ] += result[j];
}
} else {
for (int i = 0; i < columns; i++) {
int high = columnPointersA[i + 1];
long yElem = elementsY[zeroY + strideY * i];
for (int k = columnPointersA[i]; k < high; k++) {
int j = rowIndexesA[k];
elementsZ[zeroZ + strideZ * j] += alpha * valuesA[k] * yElem;
}
}
}
} else {
if ((nthreads > 1) && (cardinality() >= ConcurrencyUtils.getThreadsBeginN_2D())) {
Future[] futures = new Future[nthreads];
int k = columns / nthreads;
for (int j = 0; j < nthreads; j++) {
final int firstColumn = j * k;
final int lastColumn = (j == nthreads - 1) ? columns : firstColumn + k;
futures[j] = ConcurrencyUtils.submit(new Runnable() {
public void run() {
int zidx = zeroZ + firstColumn * strideZ;
int k = columnPointers[firstColumn];
for (int i = firstColumn; i < lastColumn; i++) {
long sum = 0;
int high = columnPointers[i + 1];
for (; k + 10 < high; k += 10) {
int ind = k + 9;
sum += valuesA[ind] * elementsY[zeroY + strideY * rowIndexes[ind--]] + valuesA[ind]
* elementsY[zeroY + strideY * rowIndexes[ind--]] + valuesA[ind]
* elementsY[zeroY + strideY * rowIndexes[ind--]] + valuesA[ind]
* elementsY[zeroY + strideY * rowIndexes[ind--]] + valuesA[ind]
* elementsY[zeroY + strideY * rowIndexes[ind--]] + valuesA[ind]
* elementsY[zeroY + strideY * rowIndexes[ind--]] + valuesA[ind]
* elementsY[zeroY + strideY * rowIndexes[ind--]] + valuesA[ind]
* elementsY[zeroY + strideY * rowIndexes[ind--]] + valuesA[ind]
* elementsY[zeroY + strideY * rowIndexes[ind--]] + valuesA[ind]
* elementsY[zeroY + strideY * rowIndexes[ind--]];
}
for (; k < high; k++) {
sum += valuesA[k] * elementsY[rowIndexes[k]];
}
elementsZ[zidx] = alpha * sum + beta * elementsZ[zidx];
zidx += strideZ;
}
}
});
}
ConcurrencyUtils.waitForCompletion(futures);
} else {
int k = columnPointers[0];
for (int i = 0; i < columns; i++) {
long sum = 0;
int high = columnPointers[i + 1];
for (; k + 10 < high; k += 10) {
int ind = k + 9;
sum += valuesA[ind] * elementsY[zeroY + strideY * rowIndexes[ind--]] + valuesA[ind]
* elementsY[zeroY + strideY * rowIndexes[ind--]] + valuesA[ind]
* elementsY[zeroY + strideY * rowIndexes[ind--]] + valuesA[ind]
* elementsY[zeroY + strideY * rowIndexes[ind--]] + valuesA[ind]
* elementsY[zeroY + strideY * rowIndexes[ind--]] + valuesA[ind]
* elementsY[zeroY + strideY * rowIndexes[ind--]] + valuesA[ind]
* elementsY[zeroY + strideY * rowIndexes[ind--]] + valuesA[ind]
* elementsY[zeroY + strideY * rowIndexes[ind--]] + valuesA[ind]
* elementsY[zeroY + strideY * rowIndexes[ind--]] + valuesA[ind]
* elementsY[zeroY + strideY * rowIndexes[ind--]];
}
for (; k < high; k++) {
sum += valuesA[k] * elementsY[rowIndexes[k]];
}
elementsZ[zidx] = alpha * sum + beta * elementsZ[zidx];
zidx += strideZ;
}
}
}
return z;
}
public LongMatrix2D zMult(LongMatrix2D B, LongMatrix2D C, final long alpha, long beta, final boolean transposeA,
boolean transposeB) {
int rowsA = rows;
int columnsA = columns;
if (transposeA) {
rowsA = columns;
columnsA = rows;
}
int rowsB = B.rows();
int columnsB = B.columns();
if (transposeB) {
rowsB = B.columns();
columnsB = B.rows();
}
int p = columnsB;
boolean ignore = (C == null);
if (C == null) {
if (B instanceof SparseCCLongMatrix2D) {
C = new SparseCCLongMatrix2D(rowsA, p, (rowsA * p));
} else {
C = new DenseLongMatrix2D(rowsA, p);
}
}
if (rowsB != columnsA)
throw new IllegalArgumentException("Matrix2D inner dimensions must agree:" + toStringShort() + ", "
+ (transposeB ? B.viewDice() : B).toStringShort());
if (C.rows() != rowsA || C.columns() != p)
throw new IllegalArgumentException("Incompatible result matrix: " + toStringShort() + ", "
+ (transposeB ? B.viewDice() : B).toStringShort() + ", " + C.toStringShort());
if (this == C || B == C)
throw new IllegalArgumentException("Matrices must not be identical");
if (!ignore && beta != 1.0) {
C.assign(cern.jet.math.tlong.LongFunctions.mult(beta));
}
if ((B instanceof DenseLongMatrix2D) && (C instanceof DenseLongMatrix2D)) {
SparseCCLongMatrix2D AA;
if (transposeA) {
AA = getTranspose();
} else {
AA = this;
}
DenseLongMatrix2D BB;
if (transposeB) {
BB = (DenseLongMatrix2D) B.viewDice();
} else {
BB = (DenseLongMatrix2D) B;
}
DenseLongMatrix2D CC = (DenseLongMatrix2D) C;
int[] columnPointersA = AA.columnPointers;
int[] rowIndexesA = AA.rowIndexes;
long[] valuesA = AA.values;
int zeroB = (int) BB.index(0, 0);
int rowStrideB = BB.rowStride();
int columnStrideB = BB.columnStride();
long[] elementsB = BB.elements;
int zeroC = (int) CC.index(0, 0);
int rowStrideC = CC.rowStride();
int columnStrideC = CC.columnStride();
long[] elementsC = CC.elements;
for (int jj = 0; jj < columnsB; jj++) {
for (int kk = 0; kk < columnsA; kk++) {
int high = columnPointersA[kk + 1];
long yElem = elementsB[zeroB + kk * rowStrideB + jj * columnStrideB];
for (int ii = columnPointersA[kk]; ii < high; ii++) {
int j = rowIndexesA[ii];
elementsC[zeroC + j * rowStrideC + jj * columnStrideC] += valuesA[ii] * yElem;
}
}
}
if (alpha != 1.0) {
C.assign(cern.jet.math.tlong.LongFunctions.mult(alpha));
}
} else if ((B instanceof SparseCCLongMatrix2D) && (C instanceof SparseCCLongMatrix2D)) {
SparseCCLongMatrix2D AA;
if (transposeA) {
AA = getTranspose();
} else {
AA = this;
}
SparseCCLongMatrix2D BB = (SparseCCLongMatrix2D) B;
if (transposeB) {
BB = BB.getTranspose();
}
SparseCCLongMatrix2D CC = (SparseCCLongMatrix2D) C;
int j, nz = 0, Cp[], Ci[], Bp[], m, n, w[], Bi[];
long x[], Bx[], Cx[];
m = rowsA;
n = columnsB;
Bp = BB.columnPointers;
Bi = BB.rowIndexes;
Bx = BB.values;
w = new int[m]; /* get workspace */
x = new long[m]; /* get workspace */
Cp = CC.columnPointers;
Ci = CC.rowIndexes;
Cx = CC.values;
for (j = 0; j < n; j++) {
int nzmaxC = CC.rowIndexes.length;
if (nz + m > nzmaxC) {
nzmaxC = 2 * nzmaxC + m;
int[] rowIndexesNew = new int[nzmaxC];
System.arraycopy(Ci, 0, rowIndexesNew, 0, Ci.length);
Ci = rowIndexesNew;
long[] valuesNew = new long[nzmaxC];
System.arraycopy(Cx, 0, valuesNew, 0, Cx.length);
Cx = valuesNew;
}
Cp[j] = nz; /* column j of C starts here */
for (p = Bp[j]; p < Bp[j + 1]; p++) {
nz = scatter(AA, Bi[p], Bx[p], w, x, j + 1, CC, nz);
}
for (p = Cp[j]; p < nz; p++)
Cx[p] = x[Ci[p]];
}
Cp[n] = nz; /* finalize the last column of C */
if (alpha != 1.0) {
CC.assign(cern.jet.math.tlong.LongFunctions.mult(alpha));
}
} else {
if (transposeB) {
B = B.viewDice();
}
// cache views
final LongMatrix1D[] Brows = new LongMatrix1D[columnsA];
for (int i = columnsA; --i >= 0;)
Brows[i] = B.viewRow(i);
final LongMatrix1D[] Crows = new LongMatrix1D[rowsA];
for (int i = rowsA; --i >= 0;)
Crows[i] = C.viewRow(i);
final cern.jet.math.tlong.LongPlusMultSecond fun = cern.jet.math.tlong.LongPlusMultSecond.plusMult(0);
final int[] rowIndexesA = rowIndexes;
final int[] columnPointersA = columnPointers;
final long[] valuesA = values;
for (int i = columns; --i >= 0;) {
int low = columnPointersA[i];
for (int k = columnPointersA[i + 1]; --k >= low;) {
int j = rowIndexesA[k];
fun.multiplicator = valuesA[k] * alpha;
if (!transposeA)
Crows[j].assign(Brows[i], fun);
else
Crows[i].assign(Brows[j], fun);
}
}
}
return C;
}
protected LongMatrix2D getContent() {
return this;
}
protected void insert(int row, int column, int index, long value) {
IntArrayList rowIndexesList = new IntArrayList(rowIndexes);
rowIndexesList.setSizeRaw(columnPointers[columns]);
LongArrayList valuesList = new LongArrayList(values);
valuesList.setSizeRaw(columnPointers[columns]);
rowIndexesList.beforeInsert(index, row);
valuesList.beforeInsert(index, value);
for (int i = columnPointers.length; --i > column;)
columnPointers[i]++;
rowIndexes = rowIndexesList.elements();
values = valuesList.elements();
}
protected void remove(int column, int index) {
IntArrayList rowIndexesList = new IntArrayList(rowIndexes);
LongArrayList valuesList = new LongArrayList(values);
rowIndexesList.remove(index);
valuesList.remove(index);
for (int i = columnPointers.length; --i > column;)
columnPointers[i]--;
rowIndexes = rowIndexesList.elements();
values = valuesList.elements();
}
private static int searchFromTo(int[] list, int key, int from, int to) {
while (from <= to) {
if (list[from] == key) {
return from;
} else {
from++;
continue;
}
}
return -(from + 1); // key not found.
}
private long cumsum(int[] p, int[] c, int n) {
int nz = 0;
long nz2 = 0;
for (int k = 0; k < n; k++) {
p[k] = nz;
nz += c[k];
nz2 += c[k];
c[k] = p[k];
}
p[n] = nz;
return (nz2);
}
private void realloc(int nzmax) {
if (nzmax <= 0)
nzmax = columnPointers[columns];
int[] rowIndexesNew = new int[nzmax];
int length = Math.min(nzmax, rowIndexes.length);
System.arraycopy(rowIndexes, 0, rowIndexesNew, 0, length);
rowIndexes = rowIndexesNew;
long[] valuesNew = new long[nzmax];
length = Math.min(nzmax, values.length);
System.arraycopy(values, 0, valuesNew, 0, length);
values = valuesNew;
}
private int scatter(SparseCCLongMatrix2D A, int j, long beta, int[] w, long[] x, int mark, SparseCCLongMatrix2D C,
int nz) {
int i, p;
int Ap[], Ai[], Ci[];
long[] Ax;
Ap = A.columnPointers;
Ai = A.rowIndexes;
Ax = A.values;
Ci = C.rowIndexes;
for (p = Ap[j]; p < Ap[j + 1]; p++) {
i = Ai[p]; /* A(i,j) is nonzero */
if (w[i] < mark) {
w[i] = mark; /* i is new entry in column j */
Ci[nz++] = i; /* add i to pattern of C(:,j) */
if (x != null)
x[i] = beta * Ax[p]; /* x(i) = beta*A(i,j) */
} else if (x != null)
x[i] += beta * Ax[p]; /* i exists in C(:,j) already */
}
return nz;
}
}