# Tag: permutation

## Populating an even distribution of values across multiple axis?

Basic Example: Axis Value Counts: Where the axis all have an equal distribution of values My attempt thus far: Output: So, I have the conditions I need on one axis, but not on the other. How can I update my method/create a method to meet both conditions? Answer You can tile you input and use a custom roll to shift

## How to avoid memory error in Python while zipping list with large number of permutations from another list to get unique combinations?

I have the code below to generate all unique combinations between trucks and the permutations of tripares. The way I do it (below) gives me correct results. However it works only when len(tripares) < 10. When len(tripares) > 11 I get a memory error. Is there a way to avoid this memory error? Answer If you just want the number

## Remove character from a string and list all possible permutations

I’m trying to go through a string and every time I come across an asterisk (*) replace it with every letter in the alphabet. Once that is done and another asterisk is hit, do the same again in both positions and so on. if possible saving these permutations to a .txt file or just printing them out. This is what

## All permutations of an array in python

I have an array. I want to generate all permutations from that array, including single element, repeated element, change the order, etc. For example, say I have this array: And if I use the itertools module by doing this: Or using loop like this: I only get: But what I want is: The result is all permutations from the array

## Python: Memory-efficient random sampling of list of permutations

I am seeking to sample n random permutations of a list in Python. This is my code: Although the code does what I want it to, it causes memory issues. I sometimes receive the error Memory error when running on CPU, and when running on GPU, my virtual machine crashes. How can I make the code work in a more

## Optimizing permutation generator where total of each permutation totals to same value

I’m wanting to create a list of permutations or cartesian products (not sure which one applies here) where the sum of values in each permutation totals to a provided value. There should be three parameters required for the function. Sample Size: The number of items in each permutation Desired Sum: The total that each permutation should add up to Set

## Permutation without repetition, efficient way

As “combinations with replacement” does, this function only produces the combination. I want permutation of each combination without repetition. For example When I tried to do this by Time complexity was exponential, and made repititions When I tested with one list sum_n_combs, which is [0, 0, 0, 0, 0, 14] produced 720 permutations when I only want 6 of them(14

## How to print each possible permutation of several arrays of strings on Python?

Let’s say I have the following arrays of strings: I want to print a list that contains all possible permutations of each element mentioned in the arrays above, following the order in which these arrays were set (i.e. it starts checking on Background, then goes to check Body, then Eyes, then Color, then Hands, and finishes on Extra). The first

## How to skim itertools permutations?

Initial code: from itertools import permutations ListX = [“A”,”B”,”C”,”(“,”)”,”#”] perm_iterator = list(permutations(ListX)) print(list(…

## Efficient reverse-factorization of a number given list of divisors

Given a number n and a list of divisors A, how can I efficiently find all the combinations of divisors that, when multiplied, yield to the number? e.g. n = 12 A = [2, 3, 4] Output: [[3, 2, 2], [2, …