Apache
/
commons-math
mirror of https://github.com/apache/commons-math.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

use direct array access where possible 

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/math/trunk@729172 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Luc Maisonobe 2008-12-23 23:25:31 +00:00
parent a20be3af18
commit 13583c53fa
1 changed files with 45 additions and 39 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

84
src/java/org/apache/commons/math/linear/AbstractRealMatrix.java
View File

@ -606,28 +606,30 @@ public abstract class AbstractRealMatrix implements RealMatrix, Serializable {
/** {@inheritDoc} */ /** {@inheritDoc} */
public RealVector operate(final RealVector v) public RealVector operate(final RealVector v)
throws IllegalArgumentException { throws IllegalArgumentException {
try {
final int nRows = getRowDimension(); return new RealVectorImpl(operate(((RealVectorImpl) v).getDataRef()), false);
final int nCols = getColumnDimension(); } catch (ClassCastException cce) {
if (v.getDimension() != nCols) { final int nRows = getRowDimension();
throw MathRuntimeException.createIllegalArgumentException("vector length mismatch:" + final int nCols = getColumnDimension();
" got {0} but expected {1}", if (v.getDimension() != nCols) {
new Object[] { throw MathRuntimeException.createIllegalArgumentException("vector length mismatch:" +
v.getDimension(), nCols " got {0} but expected {1}",
}); new Object[] {
} v.getDimension(), nCols
});
final double[] out = new double[nRows];
for (int row = 0; row < nRows; ++row) {
double sum = 0;
for (int i = 0; i < nCols; ++i) {
sum += getEntry(row, i) * v.getEntry(i);
} }
out[row] = sum;
final double[] out = new double[nRows];
for (int row = 0; row < nRows; ++row) {
double sum = 0;
for (int i = 0; i < nCols; ++i) {
sum += getEntry(row, i) * v.getEntry(i);
}
out[row] = sum;
}
return new RealVectorImpl(out, false);
} }
return new RealVectorImpl(out, false);
} }
/** {@inheritDoc} */ /** {@inheritDoc} */
@ -660,28 +662,32 @@ public abstract class AbstractRealMatrix implements RealMatrix, Serializable {
/** {@inheritDoc} */ /** {@inheritDoc} */
public RealVector preMultiply(final RealVector v) public RealVector preMultiply(final RealVector v)
throws IllegalArgumentException { throws IllegalArgumentException {
try {
return new RealVectorImpl(preMultiply(((RealVectorImpl) v).getDataRef()), false);
} catch (ClassCastException cce) {
final int nRows = getRowDimension(); final int nRows = getRowDimension();
final int nCols = getColumnDimension(); final int nCols = getColumnDimension();
if (v.getDimension() != nRows) { if (v.getDimension() != nRows) {
throw MathRuntimeException.createIllegalArgumentException("vector length mismatch:" + throw MathRuntimeException.createIllegalArgumentException("vector length mismatch:" +
" got {0} but expected {1}", " got {0} but expected {1}",
new Object[] { new Object[] {
v.getDimension(), nRows v.getDimension(), nRows
}); });
}
final double[] out = new double[nCols];
for (int col = 0; col < nCols; ++col) {
double sum = 0;
for (int i = 0; i < nRows; ++i) {
sum += getEntry(i, col) * v.getEntry(i);
} }
out[col] = sum;
final double[] out = new double[nCols];
for (int col = 0; col < nCols; ++col) {
double sum = 0;
for (int i = 0; i < nRows; ++i) {
sum += getEntry(i, col) * v.getEntry(i);
}
out[col] = sum;
}
return new RealVectorImpl(out);
} }
return new RealVectorImpl(out);
} }
/** {@inheritDoc} */ /** {@inheritDoc} */