用Java写一个心电信号高斯滤波函数

好的，以下是Java实现的心电信号高斯滤波函数的示例代码：

public static double[] gaussianFilter(double[] signal, double samplingRate, double cutoffFrequency, double filterOrder) {
    double[] result = new double[signal.length];
    double alpha = Math.exp(-Math.sqrt(2) / 2 * Math.PI * cutoffFrequency / samplingRate);
    double[] bCoeff = new double[(int) (filterOrder + 1)];
    double[] aCoeff = new double[(int) (filterOrder + 1)];

    for (int i = 0; i <= filterOrder; i++) {
        double numerator = Math.pow(-2, i) * Math.pow(alpha, 2 * i);
        double denominator = MathUtils.factorial(i) * MathUtils.factorial(i + filterOrder);
        bCoeff[i] = numerator / denominator;
    }
    for (int i = 0; i <= filterOrder; i++) {
        double numerator = MathUtils.factorial(2 * i) * bCoeff[i];
        double denominator = Math.pow(2, 2 * i) * MathUtils.factorial(i);
        aCoeff[i] = numerator / denominator;
    }

    for (int i = (int) filterOrder; i < signal.length; i++) {
        double sum = 0;
        for (int j = 0; j <= filterOrder; j++) {
            sum += bCoeff[j] * signal[i - j];
        }
        for (int j = 1; j <= filterOrder; j++) {
            sum -= aCoeff[j] * result[i - j];
        }
        result[i] = sum / aCoeff[0];
    }

    return result;
}

这是一个基于高斯分布的带阻滤波器，可以对心电信号进行滤波以降低噪声干扰。其中，samplingRate表示采样频率，cutoffFrequency表示截止频率，filterOrder表示滤波器阶数，signal是待滤波的信号。函数返回滤波后的信号result。