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  • 0 posts edited
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  • 14 votes cast
Aug
9
comment Understanding detailed balance (crossposted from stats)
@al-Hwarizmi Markov Chain Monte Carlo, a method of approximating a probability distribution with a random walk, often used in statistics. The second sentence should read "proportional to their ratio of probability densities". I've now edited it.
Aug
9
revised Understanding detailed balance (crossposted from stats)
deleted 5 characters in body
Aug
9
asked Understanding detailed balance (crossposted from stats)
Aug
6
asked Linear programming: what does the “test ratio” measure?
Jul
19
comment A method to test for uniform distribution over a convex polytope
hit and run. Pick an initial point, choose a random direction, the next point is a random point between initial point and wall in that direction.
Jul
19
comment A method to test for uniform distribution over a convex polytope
I have no way of knowing $|P|$, in fact, this method is how I would calculate $|P|$, provided the sampling is uniform.
Jul
19
asked A method to test for uniform distribution over a convex polytope
Jun
27
answered Random Point on Infinite Line Paradox
Jun
27
accepted What is the typical method for sampling uniformly in a convex polytope
Jun
24
comment What is the typical method for sampling uniformly in a convex polytope
Not in practice actually, if you make the jump length long enough. And are you saying that there is no known way to do it quickly for 1000 dimensions? Because I was considering using CUDA to do it...
Jun
24
asked What is the typical method for sampling uniformly in a convex polytope
Jun
18
comment Changing a basis and satisfying inequalities
Ah, I now realize you must be very careful with each step...
Jun
18
asked Changing a basis and satisfying inequalities
Jun
17
accepted Is there a quick way to compute the matrix whose column space is the basis of the null space of another matrix?
Jun
14
revised Is there a quick way to compute the matrix whose column space is the basis of the null space of another matrix?
edited title
Jun
14
asked Is there a quick way to compute the matrix whose column space is the basis of the null space of another matrix?
Jun
14
revised Problem generating random vectors with a randomized linear programming with equality constraints (weird clustering)
added 63 characters in body
Jun
14
revised Problem generating random vectors with a randomized linear programming with equality constraints (weird clustering)
added 20 characters in body
Jun
14
asked Problem generating random vectors with a randomized linear programming with equality constraints (weird clustering)
Mar
4
asked Two different ways to take the derivative on composite functions?