Examples of ucar.ma2.Section

ucar.ma2.Section
A section of multidimensional array indices. Represented as List. Immutable if makeImmutable() was called. @author caron

  }


  // Return the string of entity ID for the Dorade image file
  DataType getDataType(int format)
  {
      DataType p;


      switch(format)
       {
         case 1:    // 8-bit signed integer format.
              p = DataType.SHORT;

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    int ni = shape[0];
    int nj = shape[1];
    int nk = shape[2];


    array = new ArrayDouble.D3(ni, nj, nk);
    Index index = array.getIndex();


    for (int i = 0; i < ni; i++) {
      for (int j = 0; j < nj; j++) {
        for (int k = 0; k < nk; k++) {
          index.set(i, j, k);
          double d = pertArray.getDouble(index)
              + baseArray.getDouble(index);
          if (isZStag) {
            d = d / 9.81;  //convert geopotential to height
          }

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      IndexChunker.printl(" dataStrides=", dataStrides);
      IndexChunker.printa(" wantStride=", resultStrides);
      System.out.println(" indexChunks=" + Index.computeSize(shape));
    }
    dataIndex = new IndexLong(shape, dataStrides);
    resultIndex = new Index(shape, resultStrides);


    if (debugDetail) {
      System.out.println(" dataIndex="+ dataIndex.toString());
      System.out.println(" resultIndex="+ resultIndex.toStringDebug());
    }

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    Array data = v.read();
    int[] shape = data.getShape();
    assert shape[0] == 1000;
    assert shape[1] == 20;


    Index ima = data.getIndex();
    for (int i = 0; i < 1000; i++)
      for (int j = 0; j < 20; j++) {
        int val = data.getInt(ima.set(i, j));
        assert val == i + j : val + " != " + (i + j);
      }


  }

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                                  ? section.getRange(rangeIdx++)
                                  : new Range(0, 0);
        Range         yRange    = section.getRange(rangeIdx++);
        Range         xRange    = section.getRange(rangeIdx);


        IndexIterator ii        = dataArray.getIndexIterator();


        // loop over ens
        for (int ensIdx = ensRange.first(); ensIdx <= ensRange.last();
                ensIdx += ensRange.stride()) {
            //loop over time

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              ? 1
              : nk); k++) {
            origin[0] = i;
            origin[1] = j;
            origin[2] = k;
            IndexIterator it = array.section(origin,
                eshape).getIndexIterator();
            for (int l = 0; l < n; l++) {
              d[l] = it.getDoubleNext();  //get the original values
            }
            double[] d2 = extrapinterpolate(d);  //compute new values
            //define slice of new array to write into
            IndexIterator newit =
                newArray.section(origin,
                    neweshape).getIndexIterator();
            for (int l = 0; l < n + 1; l++) {
              newit.setDoubleNext(d2[l]);
            }
          }
        }
      }
    } catch (InvalidRangeException e) {

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  static public void compareData(Array data1, Array data2) {
    assert data1.getSize() == data2.getSize();
    assert data1.getElementType() == data2.getElementType() : data1.getElementType()+"!="+ data2.getElementType();
    DataType dt = DataType.getType( data1.getElementType());


    IndexIterator iter1 = data1.getIndexIterator();
    IndexIterator iter2 = data2.getIndexIterator();


    if (dt == DataType.DOUBLE) {
      while (iter1.hasNext()) {
          double v1 = iter1.getDoubleNext();
          double v2 = iter2.getDoubleNext();
          if (!Double.isNaN(v1) || !Double.isNaN(v2))
            assert v1 == v2 : v1 + " != "+ v2+" count="+iter1;
      }
    }


    else if (dt == DataType.FLOAT) {
      while (iter1.hasNext()) {
          float v1 = iter1.getFloatNext();
          float v2 = iter2.getFloatNext();
          if (!Float.isNaN(v1) || !Float.isNaN(v2))
            assert v1 == v2 : v1 + " != "+ v2+" count="+iter1;
      }
    }


    else if (dt == DataType.INT) {
      while (iter1.hasNext()) {
          int v1 = iter1.getIntNext();
          int v2 = iter2.getIntNext();
          assert v1 == v2 : v1 + " != "+ v2+" count="+iter1;
      }
    }


    else if (dt == DataType.SHORT) {
      while (iter1.hasNext()) {
          short v1 = iter1.getShortNext();
          short v2 = iter2.getShortNext();
          assert v1 == v2 : v1 + " != "+ v2+" count="+iter1;
      }
    }


    else if (dt == DataType.BYTE) {
      while (iter1.hasNext()) {
          byte v1 = iter1.getByteNext();
          byte v2 = iter2.getByteNext();
          assert v1 == v2 : v1 + " != "+ v2+" count="+iter1;
      }
    }
  }

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        Array dataArray = Array.factory(DataType.FLOAT, section.getShape());
        GradsVariable gradsVar = findVar(v2);


        // Canonical ordering is ens, time, level, lat, lon
        int           rangeIdx  = 0;
        Range         ensRange  = (gradsDDF.getEnsembleDimension() != null)
                                  ? section.getRange(rangeIdx++)
                                  : new Range(0, 0);
        Range         timeRange = (section.getRank() > 2)
                                  ? section.getRange(rangeIdx++)
                                  : new Range(0, 0);
        Range         levRange  = (gradsVar.getNumLevels() > 0)
                                  ? section.getRange(rangeIdx++)
                                  : new Range(0, 0);
        Range         yRange    = section.getRange(rangeIdx++);
        Range         xRange    = section.getRange(rangeIdx);


        IndexIterator ii        = dataArray.getIndexIterator();


        // loop over ens
        for (int ensIdx = ensRange.first(); ensIdx <= ensRange.last();

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    // create the List<Dim>
    // Section shifted = intersect.shiftOrigin(dataSection); // want reletive to dataSection
    int wantStride = 1;
    int dataStride = 1;
    for (int ii = varRank - 1; ii >= 0; ii--) {
      Range dr = dataSection.getRange(ii);
      Range wr = wantSection.getRange(ii);
      Range ir = intersect.getRange(ii);
      dimList.add(new Dim(dr, wr, ir, dataStride, wantStride)); // note reversed : fastest first
      dataStride *= dr.length();
      wantStride *= wr.length();
    }

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  public boolean hasNext() { // have to actually fetch the thing here
    if (totalNelemsDone >= totalNelems) return false;


    if ((index == null) || !index.hasNext()) { // get new data node
      try {
        Section dataSection;
        DataChunk dataChunk;


        while (true) { // look for intersecting sections


          if (!chunkIterator.hasNext()) {
            next = null;
            return false;
          }


          // get next dataChunk
          try {
            dataChunk = chunkIterator.next();
          } catch (IOException e) {
            e.printStackTrace();
            next = null;
            return false;
          }


          // make the dataSection for this chunk
          dataSection = new Section(dataChunk.offset, chunkSize);
          if (dataSection.intersects(want)) // does it intersect ?
            break;
        }


        if (debug)
          System.out.println(" found intersecting section: " + dataSection + " for filePos " + dataChunk.filePos);

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