I’d like to generate N random 3-dimensional vectors (uniformly) on the unit sphere but with the condition, that their sum is equal to 0. My attempt was to generate N/2 random unit vectors, while the other are just the same vectors with a minus sign. The problem is, as I’m trying to achieve as litt…
Tag: random
Python: generate 5 random int (every has own range) with fixed sum
Each value in Total has own range (in %). First: find random values (within ranges that is % from Total.). I tried this (but sum() can be >or< than 100): Second:find exact value for a,b,c,d,e (according to the percentage from Total in First part). I tried this: This code does not work. please help Answe…
Sample points from a hyperboloid
A hyperboloid has the formula -x^2/a^2 – y^2/b^2 + z^2/c^2 = 1. How can I generate samples from this hyperboloid in Python? (Say, with a=b=c=1.) I was thinking to pick random x and y in [0,1] and then fill in the z value that would make the formula equal 1. However this would not sample uniformly. Is th…
Why non-linear response to random values is always positive?
I’m creating a non-linear response to a series of random values from {-1, +1} using a simple Volterra kernel: With a zero mean for a(k) values I would expect r(k) to have a zero mean as well for arbitrary w values. However, I get r(k) with an always positive mean value, while a mean for a(k) behaves as …
Fill Excel cells with random numbers
I have a question about how to fill some cells in Excels with random values? For example, I have a part of the code with: Which gave me the error of: TypeError: Unsupported type <class ‘generator’> in write() How to fix it? Answer To write multiple cells, use write_row() or write_column() as…
Whenever i use random.choice in Python, i get an error. The error is in the ‘body’ page
AttributeError: ‘builtin_function_or_method’ object has no attribute ‘choice’ Process finished with exit code 1 there is an alternative to the bultin random module? Thanks Answer To use random with a choice like you write in code you need to import Here In your case will now work
How does NumPy seed its random number generators if no seed is provided?
For example, suppose I call numpy.random.uniform(0, 1, 10) without calling any of the seed-related functions. NumPy must be using some default seed, but I couldn’t find it in the documentation. How does NumPy seed its random numbers when no seed is specified? Answer For NumPy’s legacy numpy.random…
Overwriting an array in Numpy function Python
I am trying to write a numpy function that iterates with itself to update the values of its function. If for example Random_numb was equal to [50, 74, 5, 69, 50]. So the calculations would go like, 10* 50 = 500 for the first calculation, with the equation Starting_val = Starting_val * Random_numb. The Startin…
How do I make it so that if a turtle is close to a turtle, it will increase a variable?
I am trying to make a more interactive game, basically, I want to make it so that if a turtle is close to another one, it will increase a variable(in this case, the variable is score). The code is over here Does anyone know how to make it so that if the turtle is distanced close to it, it will
How to randomly choose a list out of 4 lists?
I have 3 lists, every time I want randomly pick any of the items. How can I do that? Answer You can use random.choice() Add your lists together and samples from the combined lists: