Beantwortet
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...
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...
mehr als 12 Jahre vor | 0
Beantwortet
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...
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...
mehr als 12 Jahre vor | 0
Beantwortet
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Most of those manuals or books are out of date, or are unaware of the JIT compiler, or do not understand what the JIT compiler d...
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Most of those manuals or books are out of date, or are unaware of the JIT compiler, or do not understand what the JIT compiler d...
mehr als 12 Jahre vor | 0
Beantwortet
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 ...
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 ...
mehr als 12 Jahre vor | 0
Beantwortet
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...
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...
mehr als 12 Jahre vor | 1
Frage
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...
fast 13 Jahre vor | 4 Antworten | 1
4
AntwortenBeantwortet
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...
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...
fast 13 Jahre vor | 0
Beantwortet
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...
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...
fast 13 Jahre vor | 0
Beantwortet
How do I write a good answer for MATLAB Answers?
An answer should _illuminate_ not _dazzle_.
How do I write a good answer for MATLAB Answers?
An answer should _illuminate_ not _dazzle_.
fast 13 Jahre vor | 2
Beantwortet
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 =...
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 =...
etwa 13 Jahre vor | 0
Frage
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...
etwa 13 Jahre vor | 4 Antworten | 1
4
AntwortenBeantwortet
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...
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...
etwa 13 Jahre vor | 0
Beantwortet
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 ...
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 ...
etwa 13 Jahre vor | 1
| akzeptiert
Frage
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)...
etwa 13 Jahre vor | 5 Antworten | 3
5
AntwortenBeantwortet
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...
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...
etwa 13 Jahre vor | 1
Gesendet
RPG Lab
A set of functions for generating and testing random permutations of the integers (1,2, ..., n).
etwa 13 Jahre vor | 1 Download |
