Examples of org.apache.mahout.math.ssvd.EigenSolverWrapper

org.apache.mahout.math.ssvd.EigenSolverWrapper
wraps appropriate eigen solver for BBt matrix. Can be either colt or apache commons math.
At the moment it is apache commons math which is only in mahout-math dependencies.
I will be happy to switch this to Colt eigensolver if it is proven reliable (i experience internal errors and unsorted singular values at some point). But for now commons-math seems to be more reliable.

      for (int j = 0; j < kp; j++) {
        bbtValues[i][j] = bbtRow.getQuick(j);
      }
    }


    EigenSolverWrapper eigenWrapper = new EigenSolverWrapper(bbtValues);
    double[] eigenva2 = eigenWrapper.getEigenValues();
    double[] svalues = new double[kp];
    for (int i = 0; i < kp; i++) {
      svalues[i] = Math.sqrt(eigenva2[i]); // sqrt?
    }

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      for (int j = 0; j < kp; j++) {
        bbtValues[i][j] = bbtRow.getQuick(j);
      }
    }


    EigenSolverWrapper eigenWrapper = new EigenSolverWrapper(bbtValues);


    double[] eigenva2 = eigenWrapper.getEigenValues();
    double[] svalues = new double[kp];
    for (int i = 0; i < kp; i++) {
      svalues[i] = Math.sqrt(eigenva2[i]); // sqrt?
    }

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      }


      svalues = new double[k + p];


      // try something else.
      EigenSolverWrapper eigenWrapper = new EigenSolverWrapper(bbtSquare);


      double[] eigenva2 = eigenWrapper.getEigenValues();
      for (int i = 0; i < k + p; i++) {
        svalues[i] = Math.sqrt(eigenva2[i]); // sqrt?
      }


      // save/redistribute UHat
      double[][] uHat = eigenWrapper.getUHat();


      fs.mkdirs(uHatPath);
      SequenceFile.Writer uHatWriter =
        SequenceFile.createWriter(fs,
                                  conf,

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        outerSq.assign(Functions.mult(xisquaredlen));
        bbtSquare.assign(outerSq, Functions.PLUS);


      }


      EigenSolverWrapper eigenWrapper = new EigenSolverWrapper(SSVDHelper.extractRawData(bbtSquare));
      Matrix uHat = new DenseMatrix(eigenWrapper.getUHat());
      svalues = new DenseVector(eigenWrapper.getEigenValues());


      svalues.assign(Functions.SQRT);


      // save/redistribute UHat
      fs.mkdirs(uHatPath);

View Full Code Here

      for (int j = 0; j < kp; j++) {
        bbtValues[i][j] = bbtRow.getQuick(j);
      }
    }


    EigenSolverWrapper eigenWrapper = new EigenSolverWrapper(bbtValues);
    double[] eigenva2 = eigenWrapper.getEigenValues();
    double[] svalues = new double[kp];
    for (int i = 0; i < kp; i++) {
      svalues[i] = Math.sqrt(eigenva2[i]); // sqrt?
    }

View Full Code Here

      for (int j = 0; j < kp; j++) {
        bbtValues[i][j] = bbtRow.getQuick(j);
      }
    }


    EigenSolverWrapper eigenWrapper = new EigenSolverWrapper(bbtValues);


    double[] eigenva2 = eigenWrapper.getEigenValues();
    double[] svalues = new double[kp];
    for (int i = 0; i < kp; i++) {
      svalues[i] = Math.sqrt(eigenva2[i]); // sqrt?
    }

View Full Code Here

      }


      svalues = new double[k + p];


      // try something else.
      EigenSolverWrapper eigenWrapper = new EigenSolverWrapper(bbtSquare);


      double[] eigenva2 = eigenWrapper.getEigenValues();
      for (int i = 0; i < k + p; i++) {
        svalues[i] = Math.sqrt(eigenva2[i]); // sqrt?
      }


      // save/redistribute UHat
      //
      double[][] uHat = eigenWrapper.getUHat();


      fs.mkdirs(uHatPath);
      SequenceFile.Writer uHatWriter = SequenceFile.createWriter(fs, conf,
          uHatPath = new Path(uHatPath, "uhat.seq"), IntWritable.class,
          VectorWritable.class, CompressionType.BLOCK);

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        outerSq.assign(Functions.mult(xisquaredlen));
        bbtSquare.assign(outerSq, Functions.PLUS);


      }


      EigenSolverWrapper eigenWrapper = new EigenSolverWrapper(SSVDHelper.extractRawData(bbtSquare));
      Matrix uHat = new DenseMatrix(eigenWrapper.getUHat());
      svalues = new DenseVector(eigenWrapper.getEigenValues());


      svalues.assign(Functions.SQRT);


      // save/redistribute UHat
      fs.mkdirs(uHatPath);

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