如何在 python 中找到列表数组的最小点
How find minimum point of array of lists in python
def get_minima(array):
sdiff = np.diff(np.sign(np.diff(array)))
rising_1 = (sdiff == 2)
rising_2 = (sdiff[:-1] == 1) & (sdiff[1:] == 1)
rising_all = rising_1
rising_all[1:] = rising_all[1:] | rising_2
min_ind = np.where(rising_all)[0] + 1
minima = list(zip(min_ind, array[min_ind]))
return sorted(minima, key=lambda x: x[1])
通过运行这段代码和我拥有的数据数组,它产生:
[(59, 7.958373616052042e-10),
(69, 6.5364637051479655e-09),
(105, 1.0748381102806489e-08),
(88, 2.953895857338913e-07),
(27, 9.083111768048306e-07)]
太棒了 - 它是我数据集中的所有最小值。但我只需要存储最小值——在这个特定示例中是 (59, 7.958373616052042e-10) 点。我不知道该怎么做。我尝试了一些使用 np.amin 并进行布尔比较的东西,但我对符号和语法感到很困惑,因为现在它是一个列表数组,我以前从未真正使用过它。
感谢任何帮助!
嗯,看起来太简单了,但是你试过了吗?
minima = list(zip(min_ind, array[min_ind]))
minima.sort(key=lambda x: x[1])
return minima[0]
无需对所有最小值进行排序,您可以只得到最低的一对:
def get_minima(array):
sdiff = np.diff(np.sign(np.diff(array)))
rising_1 = (sdiff == 2)
rising_2 = (sdiff[:-1] == 1) & (sdiff[1:] == 1)
rising_all = rising_1
rising_all[1:] = rising_all[1:] | rising_2
min_ind = np.where(rising_all)[0] + 1
minima = list(zip(min_ind, array[min_ind]))
return min(minima, key=lambda pair: pair[1])
例如:
minima = [(59, 7.958373616052042e-10),
(69, 6.5364637051479655e-09),
(105, 1.0748381102806489e-08),
(88, 2.953895857338913e-07),
(27, 9.083111768048306e-07)]
minimum = min(minima, key=lambda pair: pair[1])
print(minimum)
>>> (59, 7.958373616052042e-10)
def get_minima(array):
sdiff = np.diff(np.sign(np.diff(array)))
rising_1 = (sdiff == 2)
rising_2 = (sdiff[:-1] == 1) & (sdiff[1:] == 1)
rising_all = rising_1
rising_all[1:] = rising_all[1:] | rising_2
min_ind = np.where(rising_all)[0] + 1
minima = list(zip(min_ind, array[min_ind]))
return sorted(minima, key=lambda x: x[1])
通过运行这段代码和我拥有的数据数组,它产生:
[(59, 7.958373616052042e-10),
(69, 6.5364637051479655e-09),
(105, 1.0748381102806489e-08),
(88, 2.953895857338913e-07),
(27, 9.083111768048306e-07)]
太棒了 - 它是我数据集中的所有最小值。但我只需要存储最小值——在这个特定示例中是 (59, 7.958373616052042e-10) 点。我不知道该怎么做。我尝试了一些使用 np.amin 并进行布尔比较的东西,但我对符号和语法感到很困惑,因为现在它是一个列表数组,我以前从未真正使用过它。
感谢任何帮助!
嗯,看起来太简单了,但是你试过了吗?
minima = list(zip(min_ind, array[min_ind]))
minima.sort(key=lambda x: x[1])
return minima[0]
无需对所有最小值进行排序,您可以只得到最低的一对:
def get_minima(array):
sdiff = np.diff(np.sign(np.diff(array)))
rising_1 = (sdiff == 2)
rising_2 = (sdiff[:-1] == 1) & (sdiff[1:] == 1)
rising_all = rising_1
rising_all[1:] = rising_all[1:] | rising_2
min_ind = np.where(rising_all)[0] + 1
minima = list(zip(min_ind, array[min_ind]))
return min(minima, key=lambda pair: pair[1])
例如:
minima = [(59, 7.958373616052042e-10),
(69, 6.5364637051479655e-09),
(105, 1.0748381102806489e-08),
(88, 2.953895857338913e-07),
(27, 9.083111768048306e-07)]
minimum = min(minima, key=lambda pair: pair[1])
print(minimum)
>>> (59, 7.958373616052042e-10)