我正在做一个项目，并试图创建一个函数来检测趋势的增长或下降，因为一次只能给它一个元素，因为我一开始无法访问所有值。
就像这样：
第一次迭代：
def detect_trend(arr[0], k, r, q):
return array_upward_trend, array_downward_trend
第二次迭代：
def detect_trend(arr[1], k, r, q):
return array_upward_trend, array_downward_trend
等等。
The k is what defines a trend. Meaning that a trend is only formed if it has increased/decreased the last k elements. Although if a trend has started to form and after q elements we give the function the value arr[i], if this value is either a duplicate or an element within a small range r from the previous element arr[i-1] given to the function, then it does not disrupt the creation of the trend.
例如，我有这个数组
arr=[72 92 42 130 131 412 412 512 345 301 257 101 101 65 72 87 89 80 76 76 75 72 73]
the output after len(arr) iterations would be
array_upward_trend=[[42 130 131 412 412 512],[65 72 87 89]]
array_downward_trend=[[512 345 301 257 101 101 65], [89 80 76 76 75 72 73]]
k=4, q=3 and r=0.015 ( r in this case means a range of 1.5 %) for the example
我无法完成这项工作，并且再次从头开始。我真的很感谢任何帮助
谢谢
