# Michal

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**Content Feed**

Question

Volterra integral equation solver

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

8 days ago | 0 answers | 0

### 0

answersQuestion

strange performance behavior - microbenchmark

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

2 months ago | 1 answer | 0

### 1

answerHow 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...

2 months ago | 0

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/...

4 months ago | 1

Question

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...

4 months ago | 0 answers | 0

### 0

answersI have received "deactivation required"

There is an official TMW statement ...

4 months ago | 1

Question

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...

5 months ago | 1 answer | 0

### 1

answerUse Java 11 jar files in Matlab

You can use following java compiler (javac) option: --release <release> Compile for a specific VM version. Supported targets: ...

5 months ago | 0

| accepted

Question

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...

5 months ago | 1 answer | 0

### 1

answerQuestion

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...

6 months 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...

7 months 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...

7 months 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:...

9 months 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...

9 months 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...

9 months 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...

12 months 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...

1 year 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...

1 year 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: ...

1 year ago | 3 answers | 1

### 3

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...

1 year 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 ...

1 year 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: ...

2 years 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...

2 years ago | 4 answers | 1

### 4

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...

2 years 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...

2 years 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 ...

2 years 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...

2 years 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...

2 years 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...

3 years 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

3 years ago | 0