Question

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...

nästan 3 år ago | 2 answers | 3

Question

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: ...

mer än 3 år ago | 3 answers | 1

Answered

histogram 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...

histogram 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...

mer än 3 år 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 ...

mer än 3 år ago | 2 answers | 0

Answered

how 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: ...

how 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: ...

nästan 4 år 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...

nästan 4 år ago | 5 answers | 1

Question

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...

nästan 4 år ago | 0 answers | 0

Question

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...

nästan 4 år ago | 1 answer | 0

Answered

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 ...

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 ...

ungefär 4 år ago | 0

Answered

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...

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...

mer än 4 år ago | 0

Answered

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...

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...

mer än 4 år 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...

mer än 4 år ago | 2 answers | 0

Answered

strange power .^ operator behaviour

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

strange power .^ operator behaviour

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

mer än 4 år 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....

mer än 4 år ago | 2 answers | 0

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 ...

mer än 4 år ago | 1 answer | 0

Answered

matchpairs function input parameter costUnmatched

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

matchpairs function input parameter costUnmatched

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

mer än 4 år 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...

mer än 4 år ago | 1 answer | 0

Question

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...

mer än 4 år ago | 1 answer | 0

Answered

"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.'));

"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.'));

mer än 4 år 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...

mer än 4 år ago | 1 answer | 0

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...

mer än 4 år ago | 0 answers | 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...

mer än 4 år ago | 0 answers | 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 ...

nästan 5 år ago | 1 answer | 0

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: ...

nästan 5 år ago | 0 answers | 0

Answered

Check if I have done everything right

Your riemann function is completely wrong! Try this: function [integral] = riemann(x) integral = sum(calc...

Check if I have done everything right

Your riemann function is completely wrong! Try this: function [integral] = riemann(x) integral = sum(calc...

ungefär 5 år ago | 0

Answered

Randomly sorting rows while keeping column relationships the same

Apermrows = A(randperm(size(A,1)),:)

Randomly sorting rows while keeping column relationships the same

Apermrows = A(randperm(size(A,1)),:)

ungefär 5 år ago | 4

| accepted

Answered

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...

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...

ungefär 5 år ago | 1

Answered

Does Matlab support GTX 1660 graphics card?

Definitely yes!!! Did you install the proper nvidia driver on your system?

Does Matlab support GTX 1660 graphics card?

Definitely yes!!! Did you install the proper nvidia driver on your system?

ungefär 5 år 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 ...

ungefär 5 år ago | 1 answer | 0

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: ...

ungefär 5 år ago | 1 answer | 0