python中曲线下的增量面积iAUC

如何解决python中曲线下的增量面积iAUC

我找到了一种方法来做到这一点。以前我通过互联网冲浪找到一种方法，但找不到。所以我自己尝试并找到了这个。如果有错误，请随时提及。 a 是 x 值的数组，y 是 b 值的数组

    def areaUnderCurve(a,b):
    sum = 0
    for i in range(len(a)-1):
        if (b[i+1]-b[0]>=0) and (b[i]-b[0]>=0):
            temp = ((b[i]-b[0]+b[i+1]-b[0])/2)*(a[i+1]-a[i])
        elif (b[i+1]-b[0] < 0) and (b[i]-b[0] >= 0):
            temp = (b[i]-b[0])*((b[i]-b[0])/(b[i]-b[i+1])*(a[i+1]-a[i])/2)
        elif (b[i+1]-b[0] >= 0) and (b[i]-b[0] < 0):
            temp = (b[i+1]-b[0])*((b[i+1]-b[0])/(b[i+1]-b[i])*(a[i+1]-a[i])/2)
        elif (b[i]-b[0] < 0) and (b[i+1]-b[0] < 0):
            temp = 0
        sum = sum + temp
    return sum