本文整理汇总了Java中cc.mallet.types.MatrixOps.dotProduct方法的典型用法代码示例。如果您正苦于以下问题：Java MatrixOps.dotProduct方法的具体用法？Java MatrixOps.dotProduct怎么用？Java MatrixOps.dotProduct使用的例子？那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类cc.mallet.types.MatrixOps的用法示例。
在下文中一共展示了MatrixOps.dotProduct方法的2个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的Java代码示例。
示例1: mapDirByInverseHessian
import cc.mallet.types.MatrixOps; //导入方法依赖的package包/类
/**
* Adjusts direction based on approximate hessian inverse.
*
* @param yDotY
* y^T * y in BFGS calculation.
*/
private void mapDirByInverseHessian(double yDotY) {
if (s.size() == 0)
return;
int count = s.size();
for (int i = count - 1; i >= 0; i--) {
alphas[i] = -MatrixOps.dotProduct(s.get(i), direction)
/ rhos.get(i);
MatrixOps.plusEquals(direction, y.get(i), alphas[i]);
}
double scalar = rhos.get(count - 1) / yDotY;
logger.fine("Direction multiplier = " + scalar);
MatrixOps.timesEquals(direction, scalar);
for (int i = 0; i < count; i++) {
double beta = MatrixOps.dotProduct(y.get(i), direction)
/ rhos.get(i);
MatrixOps.plusEquals(direction, s.get(i), -alphas[i] - beta);
}
}
示例2: dirDeriv
import cc.mallet.types.MatrixOps; //导入方法依赖的package包/类
private double dirDeriv() {
if (l1Weight == 0) {
return MatrixOps.dotProduct(direction, grad);
} else {
double val = 0.0;
for (int i = 0; i < direction.length; i++) {
if (direction[i] != 0) {
if (parameters[i] < 0) {
val += direction[i] * (grad[i] - l1Weight);
} else if (parameters[i] > 0) {
val += direction[i] * (grad[i] + l1Weight);
} else if (direction[i] < 0) {
val += direction[i] * (grad[i] - l1Weight);
} else if (direction[i] > 0) {
val += direction[i] * (grad[i] + l1Weight);
}
}
}
return val;
}
}