Java PCACommon.sparseVectorTimesMatrix示例

示例#1

文件： ReconstructionErrJob.java 项目： caomw/sPCA

    @Override
    public void map(IntWritable iw, VectorWritable vw, Context context) throws IOException {
      if (PCACommon.pass(ERR_SAMPLE_RATE)) return;

      Vector yi = vw.get();
      if (xi == null) xi = new DenseVector(matrixY2X.numCols());
      PCACommon.sparseVectorTimesMatrix(yi, matrixY2X, xi);

      PCACommon.vectorTimesMatrixTranspose(xi, matrixC, xiCt);
      denseVectorSubtractSparseSubtractDense(xiCt, yi, zm);
      sumOfErr.assign(
          xiCt,
          new DoubleDoubleFunction() {
            @Override
            public double apply(double arg1, double arg2) {
              return arg1 + Math.abs(arg2);
            }
          });
      denseVectorPlusAbsSparseVector(sumOfyi, yi);
      denseVectorPlusAbsDenseDiff(sumOfyc, yi, ym);
    }