public String toString()

in src/main/java/org/apache/datasketches/vector/decomposition/FrequentDirections.java [437:507]
51 lines of code
12 McCabe index (conditional complexity)

  public String toString(final boolean printSingularValues,
                         final boolean printMatrix,
                         final boolean applyCompensation) {
    final StringBuilder sb = new StringBuilder();

    final String thisSimpleName = this.getClass().getSimpleName();

    sb.append(LS);
    sb.append("### ").append(thisSimpleName).append(" INFO: ").append(LS);
    if (applyCompensation) {
      sb.append("Applying compensative adjustments to matrix values").append(LS);
    }
    sb.append("   k            : ").append(k_).append(LS);
    sb.append("   d            : ").append(d_).append(LS);
    sb.append("   l            : ").append(l_).append(LS);
    sb.append("   n            : ").append(n_).append(LS);
    sb.append("   numRows      : ").append(nextZeroRow_).append(LS);
    sb.append("   SV adjustment: ").append(svAdjustment_).append(LS);

    if (printSingularValues) {
      sb.append("   Singular Vals: ")
              .append(applyCompensation ? "(adjusted)" : "(unadjusted)").append(LS);
      final double[] sv = getSingularValues(applyCompensation);
      for (int i = 0; i < Math.min(k_, n_); ++i) {
        if (sv[i] > 0.0) {
          double val = sv[i];
          if ((val > 0.0) && applyCompensation) {
            val = Math.sqrt((val * val) + svAdjustment_);
          }

          sb.append("   \t").append(i).append(":\t").append(val).append(LS);
        }
      }
    }

    if (!printMatrix) {
      return sb.toString();
    }

    final int tmpColDim = (int) B_.getNumColumns();

    sb.append("   Matrix data  :").append(LS);
    sb.append(B_.getClass().getName());
    sb.append(" < ").append(nextZeroRow_).append(" x ").append(tmpColDim).append(" >");

    // First element
    sb.append("\n{ { ").append(String.format("%.3f", B_.getElement(0, 0)));

    // Rest of the first row
    for (int j = 1; j < tmpColDim; j++) {
      sb.append(",\t").append(String.format("%.3f", B_.getElement(0, j)));
    }

    // For each of the remaining rows
    for (int i = 1; i < nextZeroRow_; i++) {

      // First column
      sb.append(" },\n{ ").append(String.format("%.3f", B_.getElement(i, 0)));

      // Remaining columns
      for (int j = 1; j < tmpColDim; j++) {
        sb.append(",\t").append(String.format("%.3f", B_.getElement(i, j)));
      }
    }

    // Finish
    sb.append(" } }").append(LS);
    sb.append("### END SKETCH SUMMARY").append(LS);

    return sb.toString();
  }