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Questions tagged [random-seed]

A random-seed is used to initialize a pseudo-random number generator in many programming languages.

937 questions
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Generating uniform random numbers in Lua

I am working on programming a Markov chain in Lua, and one element of this requires me to uniformly generate random numbers. Here is a simplified example to illustrate my question: example = function(x) local r = math.random(1,10) print(r) …
Starfish_Prime
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Setting seed for Excel random number generator

In excel below formula will generate random number from a normal distribution with mean 10 and variance 1. Is there a way to set a fix seed so that i get a fix set of random numbers all the time? I am using Excel 2010 =NORMINV(RAND(),10,1)
user2543622
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Reproducible results in Tensorflow with tf.set_random_seed

I am trying to generate N sets of independent random numbers. I have a simple code that shows the problem for 3 sets of 10 random numbers. I notice that even though I use the tf.set_random_seed to set the seed, the results of different runs do not…
Mehdi Rezaie
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Best way to add seed to Perlin noise?

I'm trying to implement 2D Perlin noise generation in C++, and some implementations I found use no seed at all (here, here or here). Other implementations take a seed value to get different noise depending on the noise value. However I found example…
vividos
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How to cancel the effect of numpy seed()?

I would like to use np.random.seed() in the first part of my program and cancel it in the second part. Again, in the first part of my python file, I want the same random numbers to be generated at each execution in the second part , I want…
u2gilles
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Same seed, different OS, different random numbers in R

I was experiencing inconsistent results between two machines and a linux server, until I realized that fixing the seed was having different effects. I am running different R versions in all of them, all above 3.3.0. Here are the examples: Linux 1 >…
epsilone
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Repeatable pagination with randomly ordered rows

I have API that returns dome paginated rows from DB. It works, however when I order rows by RANDOM() I get duplicates on consecutive pages. Is there any option to set random seed per query? If not is it possible to set random SEED globally to force…
user606521
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What is the $RANDOM_SEED$ file generated by Visual Studio build of C# solution?

We noticed that on a certain dev machine a Visual Studio (2015 update 3) debug build of a C# solution was generating a $RANDOM_SEED$ file alongside every built DLL. The content of the file is just a single number e.g. 1443972318 Deleting the file(s)…
Nick Baker
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Why using numpy.random.seed is not a good practice?

I want to do reproducible tests that use random numbers as inputs. I am used to invoke rng in Matlab and numpy.random.seed in Python. However, I noticed that the Notes section of seed's help reads: This is a convenience, legacy function. The best…
Gabriel Gleizer
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How to save and load random number generator state in Pytorch?

I am training a DL model in Pytorch, and want to train my model in a deterministic way. As written in this official guide, I set random seeds like this: np.random.seed(0) torch.manual_seed(0) torch.backends.cudnn.deterministic =…
hajduistvan
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Is it possible to reverse a pseudo random number generator?

Is it possible to reverse a pseudo random number generator? For example, take an array of generated numbers and get the original seed. If so, how would this be implemented?
Cenregoth
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Random number from a seed

I have an application where it becomes extremely noticeable if my program uses an RNG that has patterns based on its seed, as it builds landscapes based on the x coordinate of the landscape. While Random works well if you're calling Next() every…
Mike Precup
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Does one need to call srand() C function per thread or per process to seed the randomizer?

The caption pretty much says it. PS. This is for C++ Windows program.
ahmd0
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How can I input an integer seed for producing random numbers using the rand crate in Rust?

In a Rust project, I want to generate reproducible random numbers based on a integer seed as I'm used to in Java. The documentation for Seed in the rand crate states: Seed type, which is restricted to types mutably-dereferencable as u8 arrays (we…
Katharina
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Making functions that set the random seed independent

Sometimes I want to write a randomized function that always returns the same output for a particular input. I've always implemented this by setting the random seed at the top of the function and then proceeding. Consider two functions defined in…
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