Community Profile # Michal Kvasnicka

### UJV Rez, a.s.

77 total contributions since 2015

Nuclear reactor physics + Applied math (numerical methods + big data + heuristic multi-objective combinatorial black-box optimization) = Industrial applied scientist

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What 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 ...

20 days 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...

4 months 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...

5 months 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...

5 months ago | 2 answers | 0

### 2

strange power .^ operator behaviour
Very interesting description of the integer power problem: http://szhorvat.net/pelican/fast-computation-of-powers.html

7 months 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....

7 months ago | 2 answers | 0

### 2

Question

incremental training (large data set)
Is the following approach suitable for NN incremental learning in general? for bn = 1:num_batches inputs = <get batch ...

7 months ago | 1 answer | 0

### 1

matchpairs function input parameter costUnmatched
I propose the following costUnmatched input parameter estimation for given Cost matrix: costUnmatched = max(size(Cost)) * max(C...

8 months 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...

8 months ago | 1 answer | 0

### 1

Question

Just one remark regarding current situation on MATLAB Answer portal: A lot of people (including highly trustworthy) aswers on m...

8 months ago | 1 answer | 0

### 1

"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.'));

8 months 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...

8 months ago | 1 answer | 0

### 1

Question

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...

8 months ago | 0 answers | 0

### 0

Question

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...

9 months ago | 0 answers | 0

### 0

Question

how can I effectively compute expected value by histogram approximation of probability desnsity function
What is the proper way to compute effectively (fast) the expected value E(x) in a case when I have approximation of probability ...

11 months ago | 1 answer | 0

### 1

Question

symbolic function with specific properties
I need to implement the symbolic function E(m(x)), where x = [x1, ..., xN] are symbolic variables, with the folowing property: ...

11 months ago | 0 answers | 0

### 0

Check if I have done everything right
Your riemann function is completely wrong! Try this: function [integral] = riemann(x) integral = sum(calc...

1 year ago | 0

Randomly sorting rows while keeping column relationships the same
Apermrows = A(randperm(size(A,1)),:)

1 year ago | 2

| accepted

running functions in multiple instances
You need to run three function on two matlab instances simultaneously? If yes, so open two separate instances of Matlab and run...

1 year ago | 1

Does Matlab support GTX 1660 graphics card?
Definitely yes!!! Did you install the proper nvidia driver on your system?

1 year ago | 0

| accepted

Question

ranking of vector with non-unique elements
I need to perform fast ranking of the vector with non-unique elements, like in the following example: F = [10.1 31.0 20.5 20.5 ...

1 year ago | 1 answer | 0

### 1

Question

vector of integers modification
I have vector of positive integers which I need to modify into vector of consecutive integers with the same ordering. Example: ...

1 year ago | 1 answer | 0

### 1

Question

vectorised code is terribly slower
Why is the vectorized version of simple local maxima detection code significantly slower (~2-3 times) than its for-loop version?...

1 year ago | 0 answers | 0

### 0

Question

ischange in stream or moving window regime
I would like to compute change points (or linearlly segmented signal) from input data stream via moving window. Is there any eff...

1 year ago | 0 answers | 0

### 0

Is I5 9400f processor is sufficient for deep learning, performing models,Monte Carlo simulation and other heavy works on Matlab
All MC methods are in general extremely CPU consuming. So, soon or later you always reach limits of your computer. From this poi...

1 year ago | 1

| accepted

Replace elements in binary matrix
% B original binary matrix % B_ new binary matrix B_ = ~B;

1 year ago | 0

| accepted

Question

specific assignments of vector items
I am looking for suitable algorithm to solve the following problem: For vector v (Nx1, double, single) I need to find assigment...

1 year ago | 0 answers | 0

### 0

elimination of conscutive regions (generalization: ones with zeros between)
I am still looking for better (faster) solution. Any idea how to improve so far best solution: A = [1 -1 0; ...

2 years ago | 1

Question

elimination of conscutive regions (generalization: ones with zeros between)
I need effectively eliminate (by zeroing) the consecutive "1's" between "-1's" and start/end of column at each column of matrix ...

2 years ago | 3 answers | 0