Questions tagged [random]

This tag is for questions pertaining to random numbers and their generators, whether pseudo-random or truly random.

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0answers
17 views

Black jack but #TypeError: 'type' object is not subscriptable [on hold]

I'm trying to do a black jack game like this (one part of it) but i have no idea of making it work) A = 1 J = 10 Q = 10 K = 10 hand = 0 deck = [ 1, 1, 1, 1, 2, 2, 2, 2, 3, 3, 3, 3, 4, 4, 4, ...
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1answer
20 views

adding up random ints in a JSON file with Python

here is my code: #start.py import json y = {} y['red'] = {'name': "red", 'p': 0, 'rand': 0} y['blue'] = {'name': "blue", 'p': 0, 'rand': 0} y['green'] = {'name': "green", 'p': 0, 'rand': 0} with ...
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2answers
23 views

Easy way to compare random results and convert them into “points” on a JSON file in Python

Here is a simplified version of my code: import json import random y = {} y['red'] = {'name': "red", 'p': 0} y['blue'] = {'name': "blue", 'p': 0} y['green'] = {'name': "green", 'p': 0} with open('y....
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1answer
41 views

Using Pandas data frame how to randomly select row data using multiple conditions

I have a data set with column NDVI , Lat , Long, Group, Village & Taluka. I want to randomly select 10 villages in each taluka,and each 10 villages select 5 row data randomly. but I am stuck to ...
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6answers
105 views

Weighted Random Number generator with updates

My question is an extension of this question: Weighted random numbers I'm trying to implement a weighted random numbers. I'm currently just banging my head against the wall and cannot figure this ...
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2answers
52 views

Is there a better way to have my computer opponent to generate a word of (3 > random length <= 7)?

I have implemented the following method to do as such, but I still find that a lot of the times it produces only a three letter word. Once in a great while, it does do a four letter, five letter, etc. ...
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0answers
41 views

Random Number without duplicate [duplicate]

I want to generate a random numbers and view them in textbox without duplicate, so each time I click on the button, it should show a unique number. Any ideas how can I do that please? here is my Code:...
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1answer
27 views

How secure would it be to choose a random number based on time?

If I had an online room of 10 users arriving at different times and I wanted to pick up a random user once the room is full, would it be secure to select the user by using the timestamp of when the ...
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1answer
25 views

Python: Randomly select a subgroup in a group

I have a dataframe that looks like: patient_id note_id lines A 10 1 A 10 2 A 10 3 A 29 1 A 29 ...
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0answers
23 views

KMeans not returning reproducible results in sklearn, even fixing random_state

The following code tests KMeans for several n_clusters and tries to find the "best" n_clusters by the inertia criterion. However, it is not reproducible: even fixing random_state, every time I call ...
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2answers
66 views

Java Math.random closed double interval

How do I generate random double values in a closed interval [x;y] in Java, e.g [0;10]? The API of Math.random() says it returns values in [0;1), so multiplying by 10 does not help (as well as ...
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1answer
46 views

Why random is giving wrong output

I wrote a program for math game which calculates score based on right answers. It will ask the user twice for the answer of a given question, if its correct it will add 10. However the score is not ...
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0answers
12 views

random deaths in python game [on hold]

full code is here: https://repl.it/repls/UnevenLovingDecagons On the end of the loop I'd like to create situation where each few years half of colony dies. But I don't want it to happen on regular ...
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0answers
15 views

randomly distribute nodes in groups and calculate the probability distribution of nodes number in every group

Suppose there are 10000 nodes and 10 groups. I can first randomly distribute all nodes in 10 groups randomly and count the node numbers in every group: for j=1:10 for i=1:10 N=10000;% the whole ...
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5answers
63 views

Need to generate random numbers between two values ignoring the given values

I need to generate random numbers using Math.random() between two given values but ignoring on this comparation the two given values or just one depending the case. Those are the values to do: ...
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0answers
12 views

What is an alternative method of using random.choices() in python 3.5

Since, random.choices() is not available in python 3.5, is there any alternative method for this function?
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1answer
76 views

Segmentation fault with std::uniform_int_distribution

EDIT EDIT: A minimal reproducible example worked fine, in the end, I resolved the problem by carefully rebuilding my program. Doing so, I found a wrong access of an std::vector, which was probably one ...
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0answers
33 views

python - problem with loop taking info from outside of loop [on hold]

It is my first post here Please see my code: https://repl.it/repls/UnevenLovingDecagons it is a game called Namiestnik which originally was on C64 and it was text economic strategy game, but I try ...
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2answers
40 views

Android: Set Random background color for textview on create

I want is when I load my app up it to randomly have a certain colored background for each textview from a predefined list of strings. @Override protected void onCreate(Bundle savedInstanceState) { ...
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0answers
24 views

How to generate a 3D grid with (many) unique values which are equal for each user but shifted by a seed and hard to predict?

Basic idea: Looking for about 10^12 unique values which lie in a grid of about 100k x 100k x 100k and can be shifted by the position of one of those values. In 2D it would look like: _ _ Each ...
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1answer
32 views

Random sampling based on vector with multiple conditions R

I have a large dataframe SYN_data with 150000 rows and 3 columns named SNP, Gene and count.There is a list r with 2545 count values that also include some duplicates. Now I need to randomly sample ...
0
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1answer
35 views

How to use the PRNG linear congruential generator for rolling one dice in Matlab

I have to design a linear congruential generator for rolling one dice in Matlab. The general equation I use is defined by the recurrence relation: where a,b en c are large and positive values. The ...
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0answers
19 views

Generate double numbers between lowerBound and upperBound, with the value upperBound inclusive

I use the method: public static double GenerateRandomDoubleValueBetweenLowerBoundAndUpperBound(double lowerBound, double ...
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2answers
26 views

Output of shuffling a string is printed on 2 lines of output

I've decide to practice solving anagrams, something I'm very bad at. I got 1000 most common words of English language, filtered those under 5 letters and over 9 and then wrote a simple script: import ...
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4answers
56 views

Convert random numbers with a specific range in a date

I'm trying to read in random numbers and convert them into a date. I tried doing it for a first number using java.util.date and ThreadLocalRandom. It say's 'The local variable d1 may not have been ...
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1answer
20 views

How to “stash” random state generator state

I'm seeding a random number generator for reproducible results with: import random SEED = 32412542 random.seed(SEED) I'd like to make it return "non-reproducible" random values for only one part of ...
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0answers
20 views

How to generate an array with random numbers? [duplicate]

I am trying to print out an array with random numbers, but I'm getting a Arrayoutofbounds Exception. public class feld{ static int [] getRandomField(int size, int limit){ int[] array=new ...
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0answers
26 views

How to set the seed value in python to a specific number for my rancom number generator

import statistics as stat from statistics import mean from random import seed, choice from math import hypot import random from turtle import * seed(20190101) for i in range(100): i = random....
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1answer
30 views

The method of retrieving a list of data in firebase using random generate key? Thanks

My Database Structure: Hi,I'm currently working on Android Studio project. How do I retrieve a list of data in firebase with random generate key? For example, I need to retrieve the institute name, ...
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1answer
20 views

How can i get 3 random numbers as output from a list in python?

Example i have a 10 items list like below, test_list = [1, 4, 5, 2, 7, 3, 6, 8, 9, 10] so my question is how can i get 3 random numbers as output, is there any way to get it?
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2answers
36 views

How to find the frequency of second histogram based on quantile of first

I have two sets of data. In the first set I can calculate the 25th percentile and output the x value. I would then like to take that x value to a second data set and determine the frequency and ...
0
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1answer
33 views

Program printing different co ordinates from the ones I generated for it

Basically I need my program to place points I type in manually on a grid (which it does fine) and then place a point randomly on the same grid and repeat for as many times as user requests. Currently, ...
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0answers
48 views

performance issue with std::normal_distribution?

One of the classes I use has a data member that is a std::vector of about 12 million numbers (float or double). If I just read it from file and write it, that takes much less than a second. But if I ...
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0answers
19 views

Randomly generate paths with a given length and surface coverage

I am working on a tower defense style game where I want to randomly generate the paths based on given criteria - specifically the length of the path and, if possible, how much it doubles back/stays in ...
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0answers
49 views

C programming - A array and a random number?

I'm trying to get a random number between 0 and 1000000 in a C language program, but when I run my program it returns me a number 0.00000 and I want a number between 0 and 1000000. Here's the code #...
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1answer
28 views

How do I ask the Imgur API for a random image by tag?

Currently I am trying to find out, if you can ask for pictures by a given tag. Reason is, I am doing a discord-bot via Node.js where people can do commands that will need a random picture, gif by a ...
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2answers
52 views

How to divide data frame in r in groups of equal number of records and split dat randomly & equally in two data frames

I have some data that contains about 30000 records. I want to divide the data into groups of 288 records. And then sort the data into test_data & train_data separate data frames where first 4 ...
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1answer
31 views

Numpy: random seed and multithreading causes differing results

Tested on python 3.7, numpy 1.17.3: it seems, that the random number generation with numpy when using a fixed seed and multithreading is not providing consistent results. This issue does not come up ...
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3answers
55 views

Generating random array of fixed length (Java)

im just looking to change my code so that a random array of a fixed length of 100 integers is generated every time the code is ran rather than just have a pre-set array within the code. Im quite new ...
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1answer
26 views

Something wrong happens when shuffle a tensor

I am trying to shuffle a tensor, but I find there is something wrong when tryting to using random.shuffle(),here is my code: import numpy as np import torch import random if __name__ == '__main__': ...
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0answers
25 views

i want to convert randint () of python in sequincial form

i want to know which function to use get sequence form of data , how i can replace randint () used in code enter code here fig = plot.figure(figsize=(30, 30)) outer = gridspec.GridSpec(5, 5, wspace=...
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0answers
16 views

What is a rotation matrix, anyone know the answer to this question?

Question: Create a first function that fills a 1X2 vector with two random values between 1 and 100, Create a second function that takes this vector and rotates it by a parameter angle. formulas: ...
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2answers
50 views

Rand() isn't displaying random number, please help me understand what's wrong :) [duplicate]

So I am new to C++ and learning all alone... until now everything went fine, but i am learning how to use rand() and the result does bother me a little... So my goal is to generate a random number ...
0
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1answer
21 views

How use a random key in json in multidimensional array

I need get random key to select different response. I have: response.data.players["11"].name and i need random value instead of 11 because all keys are numbers.
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1answer
42 views

How to generate a random normal distribution having mean 11.7 (in Python)

I need to generate an array of 108 values following a normal distribution having mean= 11.7 and being the minimum value of the distribution 3.4, while the maximum value is 46. I tried using s = np....
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2answers
68 views

C# Generate 5 random times between 08:20:00 and 08:29:59

I'm needing to generate 5 random times between 08:20:00 and 08:29:59. These times need to be added into the top text boxes from left to right. I'm currently doing it with this code: private void ...
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1answer
54 views

Random x and y position

Only thing i want is to pick a random X position and random Y position Random x = new Random(255); Random y = new Random(255); int xp = x.Next(0, 255); int yp = y.Next(0,255); compile time Error: ...
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3answers
55 views

Random number generator returns same result upon creation of new object

I am currently teaching myself java, and one of the practice problem's final output needs different name for different objects (which is decided based on random number generator). However, every time ...
2
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2answers
43 views

SPSS Randomly select a number from a respondent's input

I'm hoping there is SPSS syntax that I can use to randomly select a number from among a couple of variables. For example: the data lists the ages of respondent's children in four variables - Age1 Age2 ...
0
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1answer
15 views

Ramdomize selected column in Excel

I am new to this formula stuffs in excel. After searched on the internet I found this =RAND() function which I am using to randomize a couple of numbers. Like the one on the image. By default, ...