public void reduce( IntWritable sameNum, Iterator<Text> data, OutputCollector<Text, jBLASArrayWritable> output, Reporter reporter) throws IOException { int totalBatchCount = exampleCount / batchSize; DoubleMatrix weights = DoubleMatrix.randn(hiddenNodes, visibleNodes); DoubleMatrix hbias = DoubleMatrix.zeros(hiddenNodes); DoubleMatrix vbias = DoubleMatrix.zeros(visibleNodes); DoubleMatrix label = DoubleMatrix.zeros(1); DoubleMatrix hidden_chain = null; DoubleMatrix vdata = DoubleMatrix.zeros(batchSize, visibleNodes); ArrayList<DoubleMatrix> outputmatricies = new ArrayList<DoubleMatrix>(); outputmatricies.add(weights); outputmatricies.add(hbias); outputmatricies.add(vbias); outputmatricies.add(label); outputmatricies.add(vdata); outputmatricies.add(hidden_chain); int j; for (int i = 0; i < totalBatchCount; i++) { j = 0; while (data.hasNext() && j < batchSize) { j++; StringTokenizer tk = new StringTokenizer(data.next().toString()); label.put(0, Double.parseDouble(tk.nextToken())); String image = tk.nextToken(); for (int k = 0; k < image.length(); k++) { Integer val = new Integer(image.charAt(k)); vdata.put(j, k, val.doubleValue()); } dataArray = new jBLASArrayWritable(outputmatricies); batchID.set("1\t" + i); output.collect(batchID, dataArray); } } }