将二维双精度数组转换为二维int数组

Question

I want to convert a 2d double array to another 2D array of integers. The double array is filled with values lower than 1. What I want to do is create a new int[][]array and, using a if else statement set the values in the new array to 1 and 0. I have posted my attempt but I am not sure where to initialize my int array which is called intMatrix.

public int[][] readCorrMatrix(){

    String filename=ReadFile.getPath();
    double[][]rawDataMatrix=ReadMatrix.readDataMatrix(filename, ",");
    RealMatrix speaRealMatrix=Spearmans.calcSpearMatrix(rawDataMatrix);
    double[][]speaRealMatrixArray=speaRealMatrix.getData();
    int[][]intMatrix=null;
    for(int i=0; i<speaRealMatrixArray.length;i++){
        for(int y=0; y<speaRealMatrixArray[i].length;y++){

            intMatrix[i][y]=(int)speaRealMatrixArray[i][y];
            if(speaRealMatrixArray[i][y]<0.6)
            {
                intMatrix[i][y]=0;
            }
                else
                {
                    intMatrix[i][y]=1;
                }               
        }
    }
    return intMatrix;
}

Do you guys have any idea as to what I am doing wrong. Thanks in advance, Jetnori.

Answer 1

int[][]intMatrix= new int[speaRealMatrixArray.length][];
...
for(int i=0; i<speaRealMatrixArray.length;i++){
      intMatrix[i] = new new int[speaRealMatrixArray[i].length];
      for(int y=0; y<speaRealMatrixArray[i].length;y++){
...

Answer 2

Your if is checking the wrong array.

intMatrix[i][y]=(int)speaRealMatrixArray[i][y]; will be always 0 if we assume that the values in the given matrix are < 1. And in the next line you check its value which must be 0 anyhow. Remove the assignment and check speaRealMatrixArray[i][y] < 0.6

Also you've got to initialize the int array correctly.

Answer 3

Initialize intMatrix properly.

Also instead of

intMatrix[i][y] = (int) speaRealMatrixArray[i][y];
if (intMatrix[i][y] < 0.6) {
    intMatrix[i][y] = 0;
} else {
    intMatrix[i][y] = 1;
}  

try

if ( speaRealMatrixArray[i][y] < 0.6) {
    intMatrix[i][y] = 0;
} else {
    intMatrix[i][y] = 1;
}