How to shuffle an array python
What's the easiest way to shuffle an array with python? Show
Machavity♦ 30.1k26 gold badges87 silver badges98 bronze badges asked Jan 23, 2009 at 18:34
3
answered Jan 23, 2009 at 18:37
David ZDavid Z 124k26 gold badges249 silver badges275 bronze badges 9
answered Jan 23, 2009 at 18:38
Douglas LeederDouglas Leeder 51.1k9 gold badges91 silver badges136 bronze badges 3 Alternative way to do this using sklearn
Output:
Advantage: You can random multiple arrays simultaneously without disrupting the mapping. And 'random_state' can control the shuffling for reproducible behavior. answered Jul 24, 2017 at 3:30
Qy ZuoQy Zuo 2,40422 silver badges21 bronze badges 4 The other answers are the easiest, however it's a bit annoying that the
Then you can do lines like:
answered Dec 20, 2011 at 22:05
Mark RhodesMark Rhodes 9,7834 gold badges46 silver badges51 bronze badges 5 Just in case
you want a new array you can use
answered Mar 29, 2017 at 18:37
Charlie ParkerCharlie Parker 11.4k41 gold badges160 silver badges267 bronze badges When dealing with regular Python lists, But when it come to
Just use: Like
dbliss 9,66815 gold badges49 silver badges81 bronze badges answered Oct 28, 2013 at 9:23
Shuai ZhangShuai Zhang 1,9413 gold badges21 silver badges23 bronze badges 2 You can sort your array with random key
key only be read once so comparing item during sort still efficient. but look like this is O(log(N)) btw answered Sep 21, 2018 at 18:37
JamesJames 13k5 gold badges57 silver badges81 bronze badges 4 In addition to the previous replies, I would like to introduce another function.
answered Nov 18, 2016 at 9:55
SaberSaber 1942 silver badges8 bronze badges I don't know I used
answered Jan 17, 2017 at 11:09
JeevaJeeva 1,6872 gold badges14 silver badges19 bronze badges 1
MBT 18.9k17 gold badges77 silver badges99 bronze badges answered Nov 14, 2018 at 15:41
Be aware that Imagine you want to shuffle an array along its first dimension, we can create the following test example,
so that along the first axis, the i-th element corresponds to a 2x3 matrix where all the elements are equal to i. If we use the correct shuffle function for multi-dimensional arrays, i.e. answered Feb 21, 2020 at 14:01
Wise CloudWise Cloud 4014 silver badges5 bronze badges How do you shuffle an array value in Python?Shuffle an Array in Python Using the random.
The random. shuffle() method takes a sequence as input and shuffles it. The important thing to note here is that the random. shuffle() does not return a new sequence as output but instead shuffles the original sequence.
How can I shuffle an array?Write the function shuffle(array) that shuffles (randomly reorders) elements of the array. Multiple runs of shuffle may lead to different orders of elements. For instance: let arr = [1, 2, 3]; shuffle(arr); // arr = [3, 2, 1] shuffle(arr); // arr = [2, 1, 3] shuffle(arr); // arr = [3, 1, 2] // ...
How do you shuffle in Python?To shuffle strings or tuples, use random. sample() , which creates a new object. random. sample() returns a list even when a string or tuple is specified to the first argument, so it is necessary to convert it to a string or tuple.
How do you shuffle two arrays in Python?Use the syntax array[p] with p as the previous result to shuffle array based on p .. array1 = np. array([[1, 1], [2, 2], [3, 3]]). array2 = np. array([1, 2, 3]). shuffler = np. random. permutation(len(array1)). |