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Michal


Last seen: 2 giorni fa Attivo dal 2015

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MATLAB, Fortran
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English

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Domanda


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...

6 giorni fa | 1 risposta | 0

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risposta

Domanda


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

15 giorni fa | 0 risposte | 0

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Domanda


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 ...

16 giorni fa | 3 risposte | 1

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Domanda


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...

9 mesi fa | 1 risposta | 0

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Domanda


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 ...

circa un anno fa | 1 risposta | 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...

circa un anno fa | 0

| accettato

Risposto
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...

circa un anno fa | 0

Domanda


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...

circa un anno fa | 2 risposte | 0

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Domanda


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)...

oltre un anno fa | 0 risposte | 0

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risposte

Domanda


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...

oltre un anno fa | 3 risposte | 0

3

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Domanda


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...

oltre un anno fa | 1 risposta | 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....

oltre un anno fa | 5

| accettato

Domanda


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...

oltre un anno fa | 4 risposte | 3

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Domanda


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

oltre un anno fa | 0 risposte | 0

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Domanda


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

quasi 2 anni fa | 1 risposta | 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...

quasi 2 anni fa | 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/...

quasi 2 anni fa | 6

Domanda


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...

quasi 2 anni fa | 1 risposta | 0

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

circa 2 anni fa | 2

Domanda


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...

circa 2 anni fa | 1 risposta | 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: ...

circa 2 anni fa | 0

| accettato

Domanda


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...

circa 2 anni fa | 2 risposte | 0

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Domanda


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...

circa 2 anni fa | 1 risposta | 1

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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...

circa 2 anni fa | 0

Domanda


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...

circa 2 anni fa | 2 risposte | 0

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Domanda


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:...

oltre 2 anni fa | 3 risposte | 0

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Domanda


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...

oltre 2 anni fa | 1 risposta | 0

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Domanda


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...

oltre 2 anni fa | 1 risposta | 0

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Use 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...

oltre 2 anni fa | 0

Domanda


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...

quasi 3 anni fa | 0 risposte | 0

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