random

问题 The goal of the program is to generate a random sequence of numbers between 1 and N, where N is passed as an argument to the program, and write the resulting sequence to a file. My file isn't produced. What am I doing wrong? Are there any errors in my code? Is there something wrong with my code? Am I outputting the file correctly? /*01*/ // /*02*/ // random_sequence_v6.c /*03*/ // Generate a random sequence of all numbers between 1 to N /*04*/ // /*05*/ #include "stdio.h" /*06*/ #include

问题 I am trying to create a function where: The output list is generated from random numbers from the input list The output list is a specified length and adds to a specified sum ex. I specify that I want a list that is 4 in length and adds up to 10. random numbers are pulled from the input list until the criteria is satisfied. I feel like I am approaching this problem all wrong trying to use recursion. Any help will be greatly appreciated!!! EDIT: for more context on this problem.... Its going

问题 I am trying to create a function where: The output list is generated from random numbers from the input list The output list is a specified length and adds to a specified sum ex. I specify that I want a list that is 4 in length and adds up to 10. random numbers are pulled from the input list until the criteria is satisfied. I feel like I am approaching this problem all wrong trying to use recursion. Any help will be greatly appreciated!!! EDIT: for more context on this problem.... Its going

问题 This question already has answers here : Postgresql:Generate Sequence (2 answers) Closed 14 days ago . I got this query to solve for the first 20 but I don’t know how to extend that to the 5 rows prepare dna_length(int) as with t1 as ( select chr(65) as s union select chr(67) union select chr(71) union select chr(84) ) , t2 as ( select s, row_number() over() as rn from t1) , t3 as ( select generate_series(1,$1) as i, round(random() * 4 + 0.5) as rn ) , t4 as ( select t2.s from t2 join t3 on

问题 I run a simulation using foreach and doParallel and struggling with random numbers (named random in the code). In a nutshell: I simulate a football league, randomly generating winners of all the matches and corresponding results. In dt_base no match was played, in dt_ex1 and dt_ex2 results of 4 matches are known already. All unknown results should be simulated. In the League Simulation Code at the bottom of this post I set 1000 simulations, split into 100 chunks (the forloop is used to send

问题 Hooking into rand has been easier in the old days... I think I followed the description in the docs, but it doesn't seem to like a sampler returning an array: using Random struct Shell{N} r0::Float64 r1::Float64 end Base.eltype(::Type{Shell{N}}) where {N} = Array{Float64, N} function Random.rand(rng::Random.AbstractRNG, d::Random.SamplerTrivial{Shell{N}}) where {N} # ignore the correctness of the sampling algorithm for now :) shell = d[] Δ = shell.r1 - shell.r0 θ = Δ .* randn(N) r = shell.r0

问题 I use the following code. I would like to get the same results for the same random seed. I use the same random seed (1 in this case) and get different results. Here is the code: import pandas as pd import numpy as np from random import seed # Load scikit's random forest classifier library from sklearn.ensemble import RandomForestClassifier from sklearn.model_selection import train_test_split seed(1) ### <----- file_path = 'https://archive.ics.uci.edu/ml/machine-learning-databases/undocumented

问题 I use the following code. I would like to get the same results for the same random seed. I use the same random seed (1 in this case) and get different results. Here is the code: import pandas as pd import numpy as np from random import seed # Load scikit's random forest classifier library from sklearn.ensemble import RandomForestClassifier from sklearn.model_selection import train_test_split seed(1) ### <----- file_path = 'https://archive.ics.uci.edu/ml/machine-learning-databases/undocumented

问题 This question already has answers here : Closed 10 years ago . Possible Duplicate: why do i always get the same sequence of random numbers with rand() ? This is my file so far: #include <stdio.h> int main(void) { int y; y = generateRandomNumber(); printf("\nThe number is: %d\n", y); return 0; } int generateRandomNumber(void) { int x; x = rand(); return x; } My problem is rand() ALWAYS returns 41. I am using gcc on win... not sure what to do here. EDIT: Using time to generate a random number

问题 The code below show how to random double in C++11. In this solution each time, when I run this program the result are the same - I don't know why? How to change it to get different solution in every time when I run the program? #include <random> int main(int argc, char **argv) { double lower_bound = 0.; double upper_bound = 1.; std::uniform_real_distribution<double> unif(lower_bound, upper_bound); std::default_random_engine re; double a_random_double = unif(re); cout << a_random_double <<