Michal
MATLAB, Fortran
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Content Feed
Question
decomposition used in parfor
In the following problem, where I need to solve many times same linear system "A" with different right sides "b" is very benefit...
environ 14 heures ago | 1 answer | 1
1
answersymbolic integration depends on different equivalent forms of function
Simple <https://www.mathworks.com/matlabcentral/answers/507683-why-does-x-x-y-dy-give-a-x-3-component#answer_418071 solution> to...
environ un mois ago | 0
Question
symbolic integration depends on different equivalent forms of function
I performed the following equaivalent symbolic integrations: syms x y A = int(x+y,x); A_ = expand(A); % just expanded...
environ un mois ago | 2 answers | 0
2
answersQuestion
multi array vectorization problem (reformulated)
How to vectorize (for-loop elimination) the following code? % init A = [ -0.8013 -0.4981; -0.2278 -0.9009]; t = 0:0.01:...
3 mois ago | 3 answers | 0
3
answersQuestion
How to formulate linear control problem for Stochastic Differential Equation solvers
I have the following linear control problem: x'(t) = A*x(t) + B*u(t) y(t) = C*x(t) + D*u(t) where x(t0) = x0 ... initial co...
3 mois ago | 0 answers | 0
0
answersQuestion
Most effective way to solve nonhomogeneous linear ODE problem
What is the most effective way to solve following "small" linear 1st order ODEs problem: x'(t) = Ax(t) + Bu(t) x(t0) = x0 whe...
3 mois ago | 2 answers | 0
2
answersUse Filter Constants to Hard Code Filter
Probably fully functional naive version of filter: function [Y, z] = myFilter(b, a, X, z) % a and b should have same order...
6 mois ago | 0
Question
Algorithm for homogenization of non-equidistant 1-D grid
I am looking for proper algorithm for so called "delta-homogenization" of 1-D non-equidistant grid. Definition: The sorted mono...
9 mois ago | 0 answers | 0
0
answersQuestion
Matlab is significantly slower than Julia on simple evaluation
More and more frequently some people open the question about speed comparison between Matlab and Julia. The main Julia developer...
9 mois ago | 2 answers | 2
2
answersQuestion
expm function problem for stiff matrix
For very specific matrix A: a = -1e20; b = eps; c = 1; A = [a,0,b;0,c,0;-b,0,a]; disp('A:'), disp(num2str(A)) A: ...
environ un an ago | 2 answers | 1
2
answershistogram of signals gaps width
This is much more simple Matlab implementation but still not optimal (+ not vectorized): signals = [1.1 NaN NaN NaN -1.4 NaN 8...
environ un an ago | 0
Question
histogram of signals gaps width
I am looking for algorithm (effective + vectorized) how to find histogram of gaps (NaN) width in the following manner: signals ...
environ un an ago | 2 answers | 0
2
answershow to install supported CUDA Toolkit 10.2 on Ubuntu 20.04 LTS Linux
After thorough discussion with Matlab support and several relevant forums (Ubuntu, NVIDIA, ...) the final result is as follows: ...
plus d'un an ago | 0
| accepted
Question
how to install supported CUDA Toolkit 10.2 on Ubuntu 20.04 LTS Linux
As you can see here, the CUDA Toolkit currently suported by R2020b is 10.2. But, as you can see here , the only supported versio...
plus d'un an ago | 3 answers | 1
3
answersQuestion
possible speed up of the ischange function by parfor
I completely understand, that any modifications of standard MATLAB functions are very dangerous, but I found the possibility how...
presque 2 ans ago | 0 answers | 0
0
answersQuestion
simple bernoulli sampler function
I am trying to find replacement of binornd function by standard MATLAB code. Is the following command r = binornd(1,p,sz) exa...
presque 2 ans ago | 1 answer | 0
1
answerWhat frustrates you about MATLAB? #2
Do you really think, that these threads are read by MTW people??? I am not sure!!! TMW definitely choose the commercial way of ...
presque 2 ans ago | 0
2018b gcc support on Ubuntu 18.04
May be this is possible solution for you: https://www.mathworks.com/matlabcentral/answers/407502-incompatible-gcc-version-with-m...
environ 2 ans ago | 0
Multi-precision linear programming
One of possible way (so far only known to me) how to solve directly and eficiently LP problems with full multi-precision support...
plus de 2 ans ago | 0
| accepted
Question
Multi-precision linear programming
I need to solve specific linear programming problem which is based on Mallows permutation probability distribution. This exponen...
plus de 2 ans ago | 2 answers | 0
2
answersstrange power .^ operator behaviour
Very interesting description of the integer power problem: http://szhorvat.net/pelican/fast-computation-of-powers.html
plus de 2 ans ago | 0
Question
strange power .^ operator behaviour
Take a look on this FEX. For vectors of length greater than >~100 elements it is more efficient to use multiple x.^2 than x....
plus de 2 ans ago | 2 answers | 0
2
answersQuestion
incremental training (large data set)
Is the following approach suitable for NN incremental learning in general? for bn = 1:num_batches inputs = <get batch ...
plus de 2 ans ago | 1 answer | 0
1
answermatchpairs function input parameter costUnmatched
I propose the following costUnmatched input parameter estimation for given Cost matrix: costUnmatched = max(size(Cost)) * max(C...
plus de 2 ans ago | 0
| accepted
Question
matchpairs function input parameter costUnmatched
How to choose proper value of parameter costUnmatched (matchpairs function) to get requested number of matches. Especially in a...
plus de 2 ans ago | 1 answer | 0
1
answerQuestion
MATLAB Answer need better policy
Just one remark regarding current situation on MATLAB Answer portal: A lot of people (including highly trustworthy) aswers on m...
plus de 2 ans ago | 1 answer | 0
1
answer"symmetrical" rows of matrix
I present the best solution so far: d = ~pdist2(A(:,1:end/2), A(:,end/2+1:end)); [iA1, iA2] = find(triu(d & d.'));
plus de 2 ans ago | 0
| accepted
Question
"symmetrical" rows of matrix
I have integer matrix A (nA x c) with even number of columns (e.g. mod(c,2) = 0) and unique rows. How to effectivelly (by spe...
plus de 2 ans ago | 1 answer | 0
1
answerQuestion
what is recommended way to apply incremental ANN learning
I would like to apply ANN for approximation (regression) of the larga data set of points {x_i, y_i}, where x_i are input vectors...
plus de 2 ans ago | 0 answers | 0
0
answersQuestion
MATLAB Connector not running
I am using Matlab Connector on Linux (LinuxMint 19.3 based on Ubuntu 18.04). When I start MATLAB connector (v 1.4.0.6) and the...
plus de 2 ans ago | 0 answers | 0
0
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