neuron/lib/math/matrix.js at master · cssrain/neuron · GitHub

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NR.define([], function(){

// create a zero matrix
function createZeroArray(m, n){
    n = n || 1;

    var matrix = [], ZERO = 0, length = m * n;

    matrix['height'] = n;

    while(length --){
        matrix.push(ZERO);
    }

    return matrix;
};


// create an identity matrix
function identityMatrix(m){
    var matrix = createZeroArray(m, m),
        pointer = 0,
        ONE = 1,
        length = m * m - ONE;

    ++ m;

    do{
        matrix[pointer] = ONE;
        pointer += m;
    }while(m < length);

    return matrix;
};


return {
    identity    : identityMatrix,
    zero        : createZeroArray
};


});