combinations

问题 I have a string (for example: "alpha beta charlie, delta&epsilon foxtrot" ) and a list (for example ["zero","omega virginia","apple beta charlie"] ). Is there a convenient way to iterate through every word and combination of words in the string in order to search for it in the list? 回答1: Purpose You're saying combinations, but combinations are semantically unordered, what you mean, is you intend to find the intersection of all ordered permutations joined by spaces with a target list. To begin

问题 Let S(w) be a set of words. I want to generate all the possible n-combination of subsets s so that the union of those subsets are always equal to S(w). So you have a set (a, b, c, d, e) and you wan't all the 3-combinations: ((a, b, c), (d), (e)) ((a, b), (c, d), (e)) ((a), (b, c, d), (e)) ((a), (b, c), (d, e)) etc ... For each combination you have 3 set and the union of those set is the original set. No empty set, no missing element. There must be a way to do that using itertools.combination

问题 I have a data frame with 20 players from 4 different teams (5 players per team), each assigned a salary from a fantasy draft. I would like to be able to create all combinations of 8 players whose salaries are equal to or less than 10000 & whose total points are greater than x but excluding any combinations that contains 4 or more players from the same team. Here is what my data frame looks like: Team Player K D A LH Points Salary PPS 4 ATN ExoticDeer 6.1 3.3 6.4 306.9 22.209 1622 1.3692 2 ATN

问题 I am a novice R programmer. I have a following series of points. df <- data.frame(x = c(1 , 2, 3, 4), y = c(6 , 3, 7, 5)) df <- df %>% mutate(k = 1) df <- df %>% full_join(df, by = 'k') df <- subset(df, select = c('x.x', 'y.x', 'x.y', 'y.y')) df Is there way to select for "unique" points? (the order of the points do not matter) EDIT: x.x y.x x.y y.y 1 6 2 3 2 3 3 7 . . . (I changed the 2 to 7 to clarify the problem) 回答1: With data.table (and working from the OP's initial df ): library(data

问题 I thought my problem had been solved using this solution, using the answer by VolkerK, but it doesn't seem to be working correctly. What I want is a function that returns all possible combinations of values contained in nested arrays. For example, if I pass in [ ['a', 'b'], ['a', 'b'], ['a', 'b'], ['a'], ['a'], ['a'] ] It would return a, a, a, a, a, a b, b, b, a, a, a a, a, b, a, a, a a, b, a, a, a, a b, a, a, a, a, a a, b, b, a, a, a b, b, a, a, a, a b, a, b, a, a, a The problem with using

问题 I'm trying to generate all combinations of the characters in a string. So the first parameter is the string given and the second parameter is the number of letters. So combinations("ab",2) should give me aa, ab, ba, bb and combinations("abc",2) should give me aa, ab, ac, ba, bb, bc, ca, cb, cc , etc. In the first case my current code gives me aa, ab, bb (so it skips ba ). This is my code: public static void combinations(String s, int n) { combinations(s,"",n); } public static void

问题 I would like to generate all combinations of two vectors, given two constraints: there can never be more than 3 characters from the first vector, and there must always be at least one characters from the second vector. I would also like to vary the final number of characters in the combination. For instance, here are two vectors: vec1=c("A","B","C","D") vec2=c("W","X","Y","Z") Say I wanted 3 characters in the combination. Possible acceptable permutations would be: "A" "B" "X" or "A" "Y" "Z" .

问题 I am trying to get all the possible combinations of words input by user. Such as words input like aa, bb, cc should give aa bb cc aabb aacc bbaa bbcc ccaa ccbb aabbcc aaccbb bbaacc bbccaa ccbbaa ccaabb They can in any order but preferably in sorted order. I have been trying to accomplish this for past hour and I think I am confused about something that I can't figure out and keep going in circles. Can someone please point me in the right direction. The code so far is import java.util.Arrays;

问题 For a given range for n variables. I have taken n=3 as an example. A : [1,3] B: [5,10,12] C: [100,113] Note the values in the above range can be float as well. How can we create a dataframe where every column represent a unique combination of the input variables? c1 c2 c3 c4 c5 c6 c7 c8 c9 c10 c11 c12 a 1 1 1 3 3 3 1 1 1 3 3 3 b 5 10 12 5 10 12 5 10 12 5 10 12 c 100 100 100 100 100 100 113 113 113 113 113 113 回答1: Using Itertools.product I can make all combinations of a list, afterwards you

问题 What is the best way to write a control structure that will iterate through each 2-element combination in a list? Example: {0,1,2} I want to have a block of code run three times, once on each of these: {0,1} {1,2} {0,2} I tried the following foreach (int i in input) { foreach (int j in input.Where(o => o != i)) { //Execute code } } However, this won't work when a list has two of the same elements. With {0,2,0} I would still want to compare elements 0 and 0 . The value is irrelevant. 回答1: It