python array top 5
Slicing a list. top5 = array[:5]. To slice a list, there's a simple syntax: array[start:stop:step]; You can omit any parameter. These are all valid: array[start:] , array[:stop] , array[::step]. Slicing a generator. import itertools top5 = itertools., result_args array([0, 4, 8, 5]) # indices of highest vals >>> result array([9, 8, 6, 7]) # highest vals. Timing: In [16]: a = np.arange(10000) In [17]: np.random.shuffle(a) In [18]: %timeit np.argsort(a) 1000 loops, best of 3: 1.02 ms per loop I
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 python array top 5 相關參考資料
How to find the index of n largest elements in a list or np.array ...
Maybe something like: >>> K [4, 5, 1, 6, 2, 5, 2, 10] >>> sorted(range(len(K)), key=lambda x: K[x]) [2, 4, 6, 0, 1, 5, 3, 7] >>> sorted(range(len(K)), key=lambda x: K[x])[-... https://stackoverflow.com How to take the first N items from a generator or list in Python ...
Slicing a list. top5 = array[:5]. To slice a list, there's a simple syntax: array[start:stop:step]; You can omit any parameter. These are all valid: array[start:] , array[:stop] , array[::step]. ... https://stackoverflow.com python - A fast way to find the largest N elements in an numpy ...
result_args array([0, 4, 8, 5]) # indices of highest vals >>> result array([9, 8, 6, 7]) # highest vals. Timing: In [16]: a = np.arange(10000) In [17]: np.random.shuffle(a) In [18]: %timeit ... https://stackoverflow.com python - Get top N elements from array in descending order - Stack ...
In [360]: a Out[360]: array([ 0.6082239 , 0.74932587, 0.50574681, 0.85241966, 0.91742228, 0.9984438 , 0.6876266 , 0.90651069, 0.53746683, 0.70674607]) In [361]: np.argpartition(-a,3) # 4,5,7 are the ... https://stackoverflow.com python - How to get indices of N maximum values in a numpy array ...
The simplest I've been able to come up with is: In [1]: import numpy as np In [2]: arr = np.array([1, 3, 2, 4, 5]) In [3]: arr.argsort()[-3:][::-1] Out[3]: array([4, 3, 1]). This involves a compl... https://stackoverflow.com Python NumPy: Get the n largest values of an array - w3resource
3 天前 - Write a Python program to get the n largest values of an array. Pictorial Presentation: Sample Solution:- Python Code: import numpy as np x = np.arange(10) print("Original array:") p... https://www.w3resource.com Python: Fetch first 10 results from a list - Stack Overflow
To find out more about these type of operations you might find this tutorial on lists helpful and the link @DarenThomas provided Explain Python's slice notation - thanks ... from itertools import... https://stackoverflow.com |