Java MLDouble.getN方法代码示例

import com.jmatio.types.MLDouble; //导入方法依赖的package包/类
public static void main(String[] args) throws IOException {
	final Map<Integer, String> database = readDatabase();

	final File outbase = new File("/Users/jon/Data/lfw/matlab-fvs/");

	for (int i = 1; i <= 128; i++) {
		final File chunk = new File(
				"/Users/jon/Downloads/data/lfw_aligned/SIFT_1pix_PCA64_GMM512/features/poolfv/1/", String.format(
						"feat_%d-v6.mat", i));

		System.out.println(chunk);

		final MatFileReader reader = new MatFileReader(chunk);
		final MLSingle feats = (MLSingle) reader.getMLArray("chunk");
		final MLDouble index = (MLDouble) reader.getMLArray("index");

		for (int j = 0; j < index.getN(); j++) {
			final int id = (int) (double) index.get(0, j);

			final File outfile = new File(outbase, database.get(id).replace(".jpg", ".bin"));
			outfile.getParentFile().mkdirs();

			final float[] vec = new float[feats.getM()];
			for (int k = 0; k < feats.getM(); k++) {
				vec[k] = feats.get(k, j);
			}

			final FloatFV fv = new FloatFV(vec);
			IOUtils.writeBinary(outfile, fv);
		}
	}

}
 

import com.jmatio.types.MLDouble; //导入方法依赖的package包/类
private int[] toIntArray(MLDouble training) {
	final int[] arr = new int[training.getN()];
	for (int i = 0; i < arr.length; i++) {
		arr[i] = training.get(0, i).intValue();
	}
	return arr;
}
 

import com.jmatio.types.MLDouble; //导入方法依赖的package包/类
public static int load(String fileName) {
        fileName = fileName.trim();
        String matFileName = fileName;
        if (fileName.endsWith(".mat") == false)
            matFileName = matFileName + ".mat";  //  append the default extension
        boolean absoluteFileName = false;
        if (scalaExec.Interpreter.GlobalValues.hostIsUnix) {
            if (fileName.startsWith("/"))
                absoluteFileName = true;
        } else {
            if (fileName.length() > 1)
                if (fileName.charAt(1) == ':')
                    absoluteFileName = true;
        }
        if (absoluteFileName == false)   // construct the path by appending the current directory
            matFileName = Directory.Current().get().path() + File.separator + matFileName;

        int numVarsReaded = 0;

        try {
            //read in the file
            MatFileReader mfr = new MatFileReader(matFileName);
            //  a map of MLArray objects that were inside MAT-file. MLArrays are mapped with MLArrays' names
            Map matFileVars = mfr.getContent();  // a map of MLArray objects  that were inside the MAT-file, mapped with their names

            Set varsSet = matFileVars.keySet();  // a set view of the keys contained in the map
            Iterator<String> varsIter = varsSet.iterator();
            boolean isRoot = true;
            while (varsIter.hasNext()) {  // for all .mat file variables
                String currentVariable = varsIter.next();  // get the String of the Matlab variable
                //  the value to which the read file maps the specified array name. Returns null if the file contains no content for this name.
                MLArray objArrayRetrived = mfr.getMLArray(currentVariable);
                if (objArrayRetrived instanceof MLDouble) {
                    // public MLArray getMLArray(String name)
                    // Returns the value to which the read file maps the specified array name. Returns null if the file contains no content for this name.
// Returns: - the MLArray to which this file maps the specified name, or null if the file contains no content for this name.
                    MLDouble mlArrayRetrived = (MLDouble) mfr.getMLArray(currentVariable);
                    String arrayName = mlArrayRetrived.getName();
                    int nrows = mlArrayRetrived.getM();
                    int ncols = mlArrayRetrived.getN();
                    double[][] data = mlArrayRetrived.getArray();   // get data
                    scalaExec.Interpreter.GlobalValues.data = new double[nrows][ncols];  // copy of data array
                    for (int r = 0; r < nrows; r++)
                        for (int c = 0; c < ncols; c++)
                            scalaExec.Interpreter.GlobalValues.data[r][c] = data[r][c];
                    // keep a global reference in order to be accessible from the interpreter
// prepare and execute a "var" command in order to pass the variable to the Interpreter

                    if (nrows == 1 && ncols == 1)  // get as single double
                    {
                        double scalarData = data[0][0];
                        scalaExec.Interpreter.GlobalValues.scalarData = scalarData;
                        scalaExec.Interpreter.GlobalValues.scalarValuesFromMatlab.put(arrayName, scalarData);
                    } else {

                        scalaExec.Interpreter.GlobalValues.arrayValuesFromMatlab.put(arrayName, scalaExec.Interpreter.GlobalValues.data);
                    }
                    numVarsReaded++;  // one more variable readed
                }   // for all .mat file variables
            }

            return numVarsReaded;

        } catch (Exception e) {
            System.out.println("Exception ");
            e.printStackTrace();
            return 0;
        }

    }
 

import com.jmatio.types.MLDouble; //导入方法依赖的package包/类
public static  int  load(String fileName) {
        fileName=fileName.trim();
      String matFileName = fileName;
      if (fileName.endsWith(".mat")==false)
          matFileName = matFileName+".mat";  //  append the default extension
      boolean absoluteFileName = false;
      if (scalaExec.Interpreter.GlobalValues.hostIsUnix)
      {
          if  (fileName.startsWith("/"))
              absoluteFileName = true;
      }
      else {
          if (fileName.length()> 1)
                if (fileName.charAt(1)==':')
              absoluteFileName = true;
      }
    if (absoluteFileName == false)   // construct the path by appending the current directory
        matFileName = Directory.Current().get().path()+File.separator+matFileName;
      
      int numVarsReaded = 0;  

    try {
        //read in the file
  MatFileReader mfr = new MatFileReader( matFileName );
  //  a map of MLArray objects that were inside MAT-file. MLArrays are mapped with MLArrays' names
  Map  matFileVars = mfr.getContent();  // a map of MLArray objects  that were inside the MAT-file, mapped with their names
  
  Set varsSet = matFileVars.keySet();  // a set view of the keys contained in the map
  Iterator <String> varsIter = varsSet.iterator();
  boolean isRoot = true;
  while (varsIter.hasNext())  {  // for all .mat file variables
        String currentVariable = varsIter.next();  // get the String of the Matlab variable
            //  the value to which the read file maps the specified array name. Returns null if the file contains no content for this name.
        MLArray  objArrayRetrived = mfr.getMLArray(currentVariable);
        if (objArrayRetrived instanceof  MLDouble) {
            // public MLArray getMLArray(String name)
        // Returns the value to which the read file maps the specified array name. Returns null if the file contains no content for this name.
// Returns: - the MLArray to which this file maps the specified name, or null if the file contains no content for this name.
         MLDouble mlArrayRetrived = (MLDouble)mfr.getMLArray(currentVariable);
         String arrayName = mlArrayRetrived.getName();
         int nrows  = mlArrayRetrived.getM();
         int ncols = mlArrayRetrived.getN();
         double [][] data  = mlArrayRetrived.getArray();   // get data
         scalaExec.Interpreter.GlobalValues.data = new double[nrows][ncols];  // copy of data array
         for (int r=0; r < nrows; r++)
             for (int c=0; c< ncols; c++)
                  scalaExec.Interpreter.GlobalValues.data[r][c] = data[r][c];
         // keep a global reference in order to be accessible from the interpreter
// prepare and execute a "var" command in order to pass the variable to the Interpreter
                 
       if (nrows == 1 && ncols == 1)  // get as single double
        {
            double scalarData = data[0][0];
            scalaExec.Interpreter.GlobalValues.scalarData = scalarData;
            scalaExec.Interpreter.GlobalValues.scalarValuesFromMatlab.put(arrayName, scalarData); 
          }
       else  {
           
           scalaExec.Interpreter.GlobalValues.arrayValuesFromMatlab.put(arrayName, scalaExec.Interpreter.GlobalValues.data);
        }
        numVarsReaded++;  // one more variable readed
     }   // for all .mat file variables
  }
    
  return numVarsReaded;
    
    }     
       
    catch (Exception e) 
    {
        System.out.println("Exception ");
        e.printStackTrace();
        return 0;
     }
      
    }