This question already has answers here:
Generate random numbers with a given distribution
(4 answers)
how to generate random numbers from 1 to 4 and 8 in swift
(2 answers)
Closed 4 months ago.
It seems like randomElement() in Swift only allows for an equally weighted selection. What would be the best (and most efficient way, as I need to repeat this very often) to select from a collection with pre-specified probabilities/weights?
Related
This question already has answers here:
Use a vector as an index to a matrix
(3 answers)
Compact MATLAB matrix indexing notation
(3 answers)
Closed 4 years ago.
For example, I have a variable i and I want to set i=(2,3) such that B(i)=B(2,3)=7.
B=[1 2 3 4
5 6 7 8];
i=('2,3');
B(i)
I am kind of stuck here. Please help.
This question already has answers here:
Image comparison - fast algorithm
(12 answers)
Image similarity comparison
(7 answers)
Closed 5 years ago.
I need a help. I don't know how to write a Matlab/Java code compare 2 images using KNN, the result should take "wrong" when image 2 is different than image 1. I have to imporve displacement between x1,x2,x3 and that each subsequent generated image with the same x1,x2,x3 is invalid (Prove that the diameter has increased). Others compare it with histograms. Anybody will help me?
This question already has answers here:
Create variables with names from strings
(6 answers)
How to Dynamically Create Variables in MATLAB [duplicate]
(3 answers)
Closed 5 years ago.
I run an algorithm that result of it is a matrix as A. I run an algorithm 50 times and I want to save results as A1 to A50 matrix. how can I write?
This question already has answers here:
Swift rand() not being random
(3 answers)
Closed 6 years ago.
I put rand() in Xcode Playground and it prints the same number 16807 even I run many times and value did not change -> "16807"!
is this a bug?
print(rand())
Mohamed Diaa,
You can make use of library functions like arc4random() or arc4random_uniform() for generating random numbers.
let random = Int(arc4random_uniform(3))
To get random value from 0 to 3
you might have to import Darwin to use it.
This question already has answers here:
Random order of rows Matlab
(4 answers)
Closed 7 years ago.
I'm looking for an efficient way to manipulate a 40x151 matrix so that the rows are randomly scrambled.
I worked out the answer just as I was about to post.
new_matrix = old_matrix(randperm(40),:)