Python：在一组数字中找到趋势

可能是您想在图表上绘制这些数字并找到一条直线，使这些直线和数字之间的总距离最小化？这称为线性回归

def linreg(X, Y):    """    return a,b in solution to y = ax + b such that root mean square distance between trend line and original points is minimized    """    N = len(X)    Sx = Sy = Sxx = Syy = Sxy = 0.0    for x, y in zip(X, Y):        Sx = Sx + x        Sy = Sy + y        Sxx = Sxx + x*x        Syy = Syy + y*y        Sxy = Sxy + x*y    det = Sxx * N - Sx * Sx    return (Sxy * N - Sy * Sx)/det, (Sxx * Sy - Sx * Sxy)/detx = [12, 34, 29, 38, 34, 51, 29, 34, 47, 34, 55, 94, 68, 81]a,b = linreg(range(len(x)),x)  //your x,y are switched from standard notation

趋势线不太可能穿过您的原始点，但是它将尽可能接近直线可以到达的原始点。使用该趋势线（a，b）的梯度和截距值，您将可以推断出超出数组末尾的线：

extrapolatedtrendline=[a*index + b for index in range(20)] //replace 20 with desired trend length