Michal

Last seen: ein Tag vor | Aktiv seit 2015

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Programming Languages:
MATLAB, Fortran
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English

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6x6 system of multivariate quadratic equations ... non-negative real solutions
What is the best way (what solver?) to effectively find real non-negative solutions of 6 multivariate quadratic equations (6 var...

20 Tage vor | 3 Antworten | 0

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1-D Bilateral Kernel Filter ... with better than O(N^2) complexity?
I am just testing Bilateral kernel filter for smoothing of 1-D signals. The basic idea of this filtering method i...

etwa ein Monat vor | 1 Antwort | 1

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Converting symbolic ODE solution to function ... Warnings
I am trying to find symbolic solution of specific non-linear ODE and then convert it to the matlab function via flowing code: s...

etwa 2 Monate vor | 1 Antwort | 0

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matlab-support linux package
Suprisingly lot of MATLAB users on Linux using and activelly recommanding the matlab-support linux package. Home page: https:/...

etwa 2 Monate vor | 1 Antwort | 0

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moving median with variable window
Is there any way how to effectively generalize movmedian function to work with variable window length or local variable k-point ...

etwa 2 Monate vor | 3 Antworten | 1

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fast evaluation of x(k+1) = x(k)*e(k)
Is there any special trick how to evaluate fast this recurrent formula: x(1) = x0 x(k+1) = x(k)*e(k), k= 1,2, ...N-1 where N...

11 Monate vor | 1 Antwort | 0

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extremely inefficient piece of code ... bug?
I have two codes that implement exactly the same task: idx(idx<=0) = 1; idx(idx>=n) = n-1; and if idx <= 0 ...

etwa ein Jahr vor | 1 Antwort | 0

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linear 1st order ODEs sytem with time-dependent coefficients solver
This problem is now (starting from R2023a) fully covered by LTV models implemented at Control System Toolbox. These LTV models a...

mehr als ein Jahr vor | 0

| akzeptiert

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linear 1st order ODEs sytem with time-dependent coefficients solver
There are two available toolboxes for time-dependent linear 1st order ODEs: LTVtools: https://www.mathworks.com/matlabcentral...

mehr als ein Jahr vor | 0

Frage

linear 1st order ODEs sytem with time-dependent coefficients solver
I need to solve many times the following ODEs system: F'(t) = A(t)*F(t) + B(t)*U(t) F(0) = F0 where matrices A(t), B(t) and v...

mehr als ein Jahr vor | 2 Antworten | 0

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simplify is not realible
How to simplify the folowing very simple expression: syms a b c e1 = -(b*(b^2 - 4*a*c)^(1/2) - 4*a*c + b^2)/(2*a*(b^2 - 4*a*c)...

mehr als ein Jahr vor | 0 Antworten | 0

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Merging piecewise polynomial (pp) structures
Is there any method how to merge two or more "pp" (peicewise polynomial) structures in a case of consecutive "pp" structures wi...

mehr als ein Jahr vor | 3 Antworten | 0

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MATLABConnector startup on Linux
Last two versios of MATLABConnector for Linux automatically put the app to the startup list, but in Preferereces settings is not...

mehr als ein Jahr vor | 1 Antwort | 0

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Warning: X does not support locale en_US.UTF-8
Official TMW statement: "This is a warning message that can be disregarded and it has no impact on the functionality of MATLAB....

mehr als ein Jahr vor | 5

| akzeptiert

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Warning: X does not support locale en_US.UTF-8
After application of R2022b_upd5 on linux mint (21.1 Cinammon) I always get the following warning at the startup: Warning: X doe...

mehr als ein Jahr vor | 4 Antworten | 3

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Volterra integral equation solver
I am looking for good (fast and accurate, with recent state of art methods) numerical (not symbolic) Volterra Integral Equation ...

fast 2 Jahre vor | 0 Antworten | 0

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strange performance behavior - microbenchmark
There are two implementations of the same algorithm: function B = alg1( B, R, alpha ) % Fast computation of L1 distance transf...

fast 2 Jahre vor | 1 Antwort | 0

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How do I speed up lsim computation in a for loop?
Better than naive using of parfor loop is transform to your final simulation model to the sparse form ... see here Transform m...

fast 2 Jahre vor | 0

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Why does MATLAB crash on Linux with "Inconsistency detected by ld.so: ../elf/dl-tls.c: 597: _dl_allocate_tls_init:"
I have similar problem with MATLAB coder on R2022b (Ubuntu Linux 20.04.3) >> coder >> Inconsistency detected by ld.so: ../elf/...

etwa 2 Jahre vor | 6

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INTEL oneAPI support for linux MATLAB
TMW officially does not support INTEL oneAPI compilers (C/C++ and Fortran), but only GCC and GFORTRAN on Linux platform. See her...

etwa 2 Jahre vor | 1 Antwort | 0

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I have received "deactivation required"
There is an official TMW statement ...

etwa 2 Jahre vor | 2

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Free-knot spline approximation (BSFK) problem
@BrunoLuong My data acquisition system produce periodically 1-D measured noised data with the fixed time window length W. I wa...

etwa 2 Jahre vor | 1 Antwort | 0

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Use Java 11 jar files in Matlab
You can use following java compiler (javac) option: --release <release> Compile for a specific VM version. Supported targets: ...

etwa 2 Jahre vor | 0

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support of Java11
What are the plans to to use Java11 in future MATLAB releases? So far is still using Java 1.8, but Java 11 is now standard defau...

etwa 2 Jahre vor | 2 Antworten | 0

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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...

mehr als 2 Jahre vor | 1 Antwort | 1

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Beantwortet
symbolic 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...

mehr als 2 Jahre vor | 0

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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...

mehr als 2 Jahre vor | 2 Antworten | 0

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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:...

mehr als 2 Jahre vor | 3 Antworten | 0

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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...

mehr als 2 Jahre vor | 1 Antwort | 0

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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...

mehr als 2 Jahre vor | 1 Antwort | 0

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