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1,678 questions found in Answers

1

answer

How to avoid memory leaks when function inside parfor generates warning?

Asked by Jonas on 30 Mar 2017
Latest activity Commented on by xl z on 13 Nov 2023
Accepted Answer by Edric Ellis
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5

answers

How to calculate sum(A .* (B * C), 'all') [Ed. actually sum(A .* log(B * C), 'all')] efficiently when A is sparse and B*C is full and large?

Asked by Wenyu Zhang on 29 Oct 2021
Latest activity Edited by James Tursa on 9 Nov 2021
Accepted Answer by James Tursa
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2

answers

Problem Defining Function (Time Shift)

Asked by selin oktay on 12 Dec 2021
Latest activity Answered by William Rose on 13 Dec 2021
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Find Documentation, Examples and more on Performance and Memory in Help Center

1

answer

Is cputime a linear function of the number of for-loops?

Asked by Hao on 3 Jun 2020
Latest activity Commented on by Hao on 3 Jun 2020
Accepted Answer by John D'Errico
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1

answer

How does the way MATLAB passes parameters to function - by values vs by objects - affect the perfomance?

Asked by Saiful on 2 Aug 2013
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1

answer

Error in mutation part of artificial immune system code

Asked by Ahmad Firdaus on 6 Apr 2011
Latest activity Edited by Walter Roberson on 15 Apr 2014
Accepted Answer by Walter Roberson
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Find Code on Performance and Memory in File Exchange

4

answers

How to find first '1' in every row

Asked by Kasmayanti Sakaria on 7 Nov 2017
Latest activity Edited by Jan on 23 May 2019
Accepted Answer by Matt J
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1

answer

Why is vertcat slowing things down?

Asked by Doron on 23 Feb 2012
Latest activity Edited by Matt J on 22 Oct 2013
Accepted Answer by Honglei Chen
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1

answer

How to run a for loop n times with a different size matrix inside the loop

Asked by BryanE on 5 Sep 2018
Latest activity Edited by Koundinya on 11 Sep 2018
Accepted Answer by Koundinya
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2

answers

Confusion with tic-toc and run times

Asked by Milos on 7 Jun 2023
Latest activity Commented on by Steven Lord on 14 Jun 2023
Accepted Answer by Jim Riggs
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2

answers

Real coded genetic algorithm in matlab

Asked by Sandi J on 7 Sep 2018
Latest activity Commented on by Walter Roberson on 20 Nov 2018
Accepted Answer by Walter Roberson
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2

answers

Why does runtime decrease the more times I execute a command?

Asked by Liyuan on 26 Dec 2017
Latest activity Commented on by Walter Roberson on 28 Dec 2017
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2

answers

How use all cpu cores?

Asked by charly on 7 Jun 2017
Latest activity Commented on by Walter Roberson on 8 Jun 2017
Accepted Answer by Walter Roberson
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1

answer

How to add a variable that is not shown in workplace to the workplace?

Asked by reza on 24 Jan 2019
Latest activity Edited by Stephen23 on 24 Jan 2019
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2

answers

How to pre-allocate an empty matrix ?

Asked by Amandeep Singh on 10 Apr 2017
Latest activity Edited by Stephen23 on 11 Apr 2017
Accepted Answer by Jan
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1

answer

array of anonymous function

Asked by david on 25 Jun 2023
Latest activity Commented on by david on 26 Jun 2023
Accepted Answer by Matt J
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2

answers

is x' * x faster than x.^2 (x is a vector)

Asked by Yuji Zhang on 3 Oct 2014
Latest activity Edited by Matheus Rocha on 9 Aug 2021
Accepted Answer by John D'Errico
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2

answers

getting rid of for loop in a function with long arrays

Asked by elis02 on 4 Aug 2017
Latest activity Commented on by Jan on 7 Aug 2017
Accepted Answer by dpb
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1

answer

Using subrange makes array operations slow

Asked by Clayton Davis on 18 Dec 2014
Latest activity Edited by Matt J on 20 Dec 2014
Accepted Answer by Matt J
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2

answers

Is there a way to prevent matlab from going into swap memory?

Asked by Craig on 10 Oct 2011
Accepted Answer by Walter Roberson
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1

answer

Unique and Length of every rows of a matrix

Asked by Jean-Philippe on 23 Jul 2011
Accepted Answer by Oleg Komarov
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1

answer

cputime and tic...toc: high time difference

Asked by Viviana Arrigoni on 7 Feb 2019
Latest activity Answered by Steven Lord on 7 Feb 2019
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1

answer

Why does this code give error?

Asked by Sadiq Akbar on 15 Feb 2023
Latest activity Commented on by Sadiq Akbar on 16 Feb 2023
Accepted Answer by Walter Roberson
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2

answers

Two algorithms that give me different timing results on two different machines

Asked by John on 11 Mar 2013
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2

answers

Differences in memory pre-allocation approaches.

Asked by Reynaldo on 27 May 2013
Latest activity Answered by Jan on 18 Jan 2017
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1

answer

Help with Alogrithm????

Asked by qasim zia on 23 Sep 2015
Latest activity Edited by James Tursa on 24 Sep 2015
Accepted Answer by James Tursa
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2

answers

How is execution time (cpu time) calculated for multi-core cpu?

Asked by Jeff on 17 Apr 2012
Latest activity Answered by Philip Borghesani on 23 Sep 2016
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1

answer

how to search a NXN matrix from the smallest entry to the largest, and checking to see if row = column or if the column does not equal to.

Asked by pj brown on 20 Sep 2014
Latest activity Commented on by Image Analyst on 21 Sep 2014
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2

answers

Finding the maximum values of four variables and nine participants

Asked by Laura Judson on 29 Jul 2015
Latest activity Commented on by Laura Judson on 29 Jul 2015
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1

answer

Is it possible to use Arrayfun across rows

Asked by William Ambrose on 6 Oct 2020
Latest activity Commented on by Mohammad Sami on 8 Oct 2020
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2

answers

Why the preallocated matrix perform slower in the case below?

Asked by Amit on 6 Feb 2014
Latest activity Answered by Jos (10584) on 6 Feb 2014
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2

answers

How to calculate trace(A' * B) using SVD vectors of A and B?

Asked by Xiaohan Du on 26 Jun 2018
Latest activity Edited by Jan on 29 Jun 2018
Accepted Answer by Anton Semechko
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2

answers

Which one is faster: trace(a' * b) or sum(sum(a .* b', 2))?

Asked by Xiaohan Du on 21 Jun 2018
Latest activity Commented on by John D'Errico on 21 Jun 2018
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1

answer

Code Continuously Runs - Newton Raphson

Asked by Kody Haugli on 7 Mar 2015
Latest activity Commented on by James Tursa on 7 Mar 2015
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2

answers

Could you point out any errors in my code?

Asked by Abhishek Jani on 9 Mar 2015
Latest activity Commented on by Image Analyst on 9 Mar 2015
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2

answers

How to solve preallocating speed of a variable?

Asked by snr matlb on 21 Jan 2021
Latest activity Commented on by snr matlb on 21 Jan 2021
Accepted Answer by Stephen23
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1

answer

Measure performance of 2 programmes

Asked by Xiaohan Du on 10 Aug 2018
Latest activity Answered by Stephan on 10 Aug 2018
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1

answer

MATLAB Consumes my PC Memory

Asked by Ezekiel Agunlejika on 19 Oct 2011
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1

answer

How can i speed up my function?

Asked by Gerrit on 8 Jan 2020
Latest activity Commented on by Gerrit on 12 Jan 2020
Accepted Answer by Philippe Lebel
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2

answers

How to extract last non-zero element above current row in same column?

Asked by Genaro Hiscock on 22 May 2020
Latest activity Commented on by Genaro Hiscock on 23 May 2020
Accepted Answer by Abdolkarim Mohammadi
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1

answer

Proving distributive law with for loop

Asked by Brian Villeneuve on 19 Jan 2016
Latest activity Commented on by Roger Wohlwend on 21 Jan 2016
Accepted Answer by Roger Wohlwend
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1

answer

What does squeeze() do in MATLAB?

Asked by Swati Sarangi on 19 Nov 2020
Latest activity Commented on by Swati Sarangi on 20 Nov 2020
Accepted Answer by John D'Errico
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1

answer

Help with iteration counter not working or displaying wrong numbers?

Asked by Ralph Rodrigues on 25 Feb 2021
Latest activity Commented on by Ralph Rodrigues on 26 Feb 2021
Accepted Answer by Walter Roberson
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2

answers

Why vectorized calculations are faster than for loops?

Asked by Mikhail on 26 Oct 2014
Latest activity Moved by Walter Roberson on 24 Apr 2025
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2

answers

Efficient data storage for real-time simulation

Asked by Linus on 20 Mar 2013
Accepted Answer by Wouter
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1

answer

How to skip some values in for loop ?

Asked by mustafa ozendi on 9 Jan 2019
Latest activity Commented on by mustafa ozendi on 10 Jan 2019
Accepted Answer by Stephen23
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2

answers

how to write the right code to measure the elapsed time of this method d1 = diag(1./diag(A))

Asked by Amna on 23 Jun 2024
Latest activity Commented on by Matt J on 23 Jun 2024
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1

answer

running two users/m-files in parallel on Xeon Phi coproccessor

Asked by Arik Yochelis on 2 May 2016
Latest activity Commented on by Anatoli Juditsky on 10 Sep 2016
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1

answer

how to calculate inverse of modulus function

Asked by Bhavya K on 7 Jan 2022
Latest activity Commented on by Bhavya K on 8 Feb 2024
Accepted Answer by John D'Errico
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1

answer

How much memory is used by all functions and subfunctions in my program?

Asked by abebe on 8 Mar 2013
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