Answered
Fast calculation of short cumulative product vector
Nobody has followed Knut's suggestion: y(n) = y(n-1)*y(1) It is in fact a special case of Horner's Method for evaluating a...

8 years ago | 0

Answered
alternative to log?
No matter what transformation you use, the result, prod(pi, i=1:n) --> 0, so eventually you will get underflow in fixed precisio...

8 years ago | 0

Answered
Loop unrolling question
Most of those manuals or books are out of date, or are unaware of the JIT compiler, or do not understand what the JIT compiler d...

8 years ago | 0

Answered
Loop unrolling question
David, What you call _loop unrolling_ is not. Here is a rolled-up loop: for i = 1:n a(i) = b(i)*c(i) end ...

8 years ago | 0

Answered
Why does 1 - 2/3 - 1/3 not equal zero?
Ned, Let me add to the confusion by asking 1. Why does |en1 = (1 - 2/3) - 1/3 = 5.5511e-017 = 2^(-54) = eps/2^2|? 2. Why does...

8 years ago | 0

Question


What does RANDPERM miss?
Abstractly, a random permutation generator (RPG) is a function that maps a random bit-string of length |b| into a permutation of...

8 years ago | 4 answers | 1

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answers

Answered
How to average only positive values in an array?
At the risk of offending the "vectorizers", the function below is 2 to 3 times faster than Jan's answer: function MeanP...

8 years ago | 0

Answered
MATLAB's accuracy of digits number
Here is a quotation from Prof Nick Trefethen FRS, Oxford: 11. _No physical constants are known to more than around eleven digit...

8 years ago | 0

Answered
How do I write a good answer for MATLAB Answers?
An answer should _illuminate_ not _dazzle_.

8 years ago | 2

Answered
random elements from specific rows in matrix
function rrelems = RandRowElems(A) % USE: m = 10; n = 10^6; % A = ceil(100*rand(m,n)); % tic;relems =...

8 years ago | 0

Question


What is the "best" way to Generate a Bernoulli Process?
A *Bernoulli Process* is a sequence of iid (independent, identically-distributed) random variables |x1,x2,...,xi,...|, where t...

8 years ago | 3 answers | 1

3

answers

Answered
Profiler Paradox
In certain cases the profiler is worse than useless -- it is misleading. As you will have noticed, the profiler adds a lot of ov...

8 years ago | 0

Answered
Does MATLAB have a Birthday Problem?
Reply from Derek O'Connor: I must apologize for the omission of the RNG used. It was in my original draft but somehow got left ...

8 years ago | 1

| accepted

Question


Does MATLAB have a Birthday Problem?
The Birthday Paradox or problem asks for the probability that in a room of n people, 2 or more have the same birthday (not date)...

8 years ago | 5 answers | 2

5

answers

Answered
Can MATLAB draw graphs or networks with a regular structure?
Berk, Graph layout is a very difficult problem and has been studied for many years. AT&T has a department or section dedica...

8 years ago | 1

Submitted


RPG Lab
A set of functions for generating and testing random permutations of the integers (1,2, ..., n).

8 years ago | 1 download |

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