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Thread: need help solving Gaussian method for inverse

  1. #1
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    Default need help solving Gaussian method for inverse

    i got some code but its not working or compiling. i need to use this code to find inverse of any size matrix. specific help would be appreciated. here is my code:

    public static double[][] GaussianEliminverse(double[][] A,int B)
    {
    double[][] b = new double[B][B];
    for (int row = 0; row < B; row++) {
    for (int col = 0; col < B; col++) {
    if (row == col) {
    b[row][col] = 1;
    } else {
    b[row][col] = 0;
    }
    }
    }

    double pivot, factor;
    int i;
    int j;
    int k;

    int n = b.length;

    for (i = 0; i < n; i++) {
    pivot = A[i][i];

    for (j = 0; j < n; j++)
    A[i][j] = A[i][j] / pivot;

    b[i][j] = b[i][j] / pivot;

    for (k = 0; k < n; k++) {
    if (k != i) {
    factor = A[k][i];

    for (j = 0; j < n; j++)
    A[k][j] = A[k][j] - factor * A[i][j];

    b[k][j] = b[k][j] - factor * b[i][j];
    }
    }
    }
    for (int row = 0; row < b.length; row++) {
    for (int col = 0; col < b[row].length; col++) {
    System.out.print(b[row][col] + " ");
    }
    System.out.println();
    }
    return (b);
    }


  2. #2
    Administrator copeg's Avatar
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    Default Re: need help solving Gaussian method for inverse

    Please keep this discussion in your other thread:
    java help with inversing matrices
    I am locking this thread.

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