Recent questions tagged random

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random - How to generate a boolean with p probability using C rand() function?

How can I generate a random boolean with a probability of p (where 0 <= p <= 1.0) using the C standard ... (double probability) { return ... } See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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random - Python sklearn RandomForestClassifier non-reproducible results

I've been using sklearn's random forest, and I've tried to compare several models. Then I noticed that random ... instead of random.seed(). See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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random - set.seed with R 2.15.2

My understanding is that using set.seed ensures reproducibility but this is not the case with the following R code in ... -0.2841597 -0.9193220 See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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random - Python Pygame randomly draw non overlapping circles

Im very new to python and seem to be missing something. I want to randomly draw circles on a pygame display but ... .QUIT: pygame.quit() quit() See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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random - how to randomly select a neighbor patch that has a higher elevation in netlogo

how to randomly select among all the neighbour patches that are higher instead of the highest neighbour patch? I ... to one-of neighbors] end See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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random - How to make a reproducible data sample in PowerBI using Python?

This is a self-answered post. Why? Because many questions in Power BI go unanswered because of lacking data ... using Python in Power BI? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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random forest - Access trees and nodes from LightGBM model

In sci-kit learn, it's possible to access the entire tree structure, that is, each node of the tree. This allows ... b) every node of a tree? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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random element from array in c

How can I select a random element from a character array in c ? For instance: char *array[19]; array[0] = "Hi"; ... like 1, 2, 3 , 19 etc. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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random access file in java

I have the following fields: Inventory control (16 byte record) Product ID code (int - 4 bytes) Quantity in ... $32.25 Thanks for the help. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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random - SecureRandom provider "Crypto" unavailable in Android N for deterministially generating a key

Users can purchase a "Pro" version of my app. When they do, I store and verify their purchase as follows. ... } return result.toString(); } See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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464 views

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random - Why is this shuffling algorithm wrong?

Before I read about Fisher-Yates, this is the algorithm I came up with: def sort(arr): for i in range( ... does not produce a random shuffle). See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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random - Taking a disproportionate sample from a dataset in R

If I have a large dataset in R, how can I take random sample of the data taking into consideration the ... a biased sample of the data? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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462 views

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random - Advantage of using static variables in Java

Say I have two classes like this: class A{ private static Random random = new Random(); public A(){ ... profiling I might choose something else. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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451 views

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random - C++ | Generating a pseudo number between 10-20

I am making a text-based C++ RPG and I am trying to figure out how to work out the amount of damage ... , any help would be greatly appreciated. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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random - Swift - Seeding arc4random_uniform? Or alternative?

Let me start by stating what I'm trying to accomplish: I need to randomly generate a set of numbers ... uniformly distributed? Thanks, - Adam See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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492 views

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random - Determinism in tensorflow gradient updates?

So I have a very simple NN script written in Tensorflow, and I am having a hard time trying to trace down ... might be coming from... Thanks See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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411 views

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random - Randomize matrix in perl, keeping row and column totals the same

I have a matrix that I want to randomize a couple of thousand times, while keeping the row and column totals the ... ,$i]; } return @$array; } See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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random - PHP code for generating decent-looking coupon codes (mix of letters and numbers)

For an ecommerce site I want to generate a random coupon code that looks better than a randomly generated value. ... 's not really that random) See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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584 views

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random Decimal in python

How do I get a random decimal.Decimal instance? It appears that the random module only returns floats which are a pita to convert to Decimals. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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596 views

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random - python shuffle such that position will never repeat

I'd like to do a random shuffle of a list but with one condition: an element can never be in the same ... is allowed. Any ideas? thanks! See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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511 views

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random - Questions about set.seed() in R

I understand what set.seed() does and when I might use it, but I still have many questions about the function. ... form to see what I mean)? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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488 views

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random - Programmatically choose high-contrast colors

This should be a simple question, but I haven't been able to find a way to make it work. Essentially, I have a ... to be able to read the text. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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775 views

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random - AWS DynamoDB - Pick a record/item randomly?

Any ideas how to pick an item/record randomly from a DynamoDB table? I don't believe there are any ... long-run. Thoughts/ideas welcome. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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545 views

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random - JavaScript expression to generate a 5-digit number in every case

for my selenium tests I need an value provider to get a 5-digit number in every case. The problem with javascript ... case (in an expression!) ? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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550 views

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random - Java normal distribution

I'm trying to simulate the arrival of fans to a stadium. The system itself, I believe it won't be a ... . Can someone please enlighten me? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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585 views

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random forest - How to get the probability per instance in classifications models in spark.mllib

I'm using spark.mllib.classification.{LogisticRegressionModel, LogisticRegressionWithSGD} and spark.mllib.tree.RandomForest for ... in Spark) See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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545 views

1 answer

random - Randomization in Qualtrics using Photos or Graphics and Loop and Merge

I am creating a survey in Qualtrics with many photos, say 1000. I want to have each survey participant answer, say ... photos one at a time). See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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602 views

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random - JavaScript - How to randomly sample items without replacement?

JavaScript I've tried searching for something like this, but I am not able to find it. It's a simple idea ... , because it has already appeared. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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