John D'Errico
Retired
A retired applied mathematician, consultant, sometime mechanical engineer, numerical analyst, woodworker, bridge player. Please DON'T contact me, as too many students then decide I am their personal consultant if I allow it. I won't do consulting by mail.
John D'Errico's Badge
MATLAB Answers Badge
Tutto
First Answer 20 Jul 2017Provide your first answer ever to someone else's question
Awarded to John D'Errico on 20 Jul 2017
Knowledgeable Level 5 20 Jul 2017100 of your answers have been accepted
Awarded to John D'Errico on 20 Jul 2017
Thankful Level 5 20 Jul 2017Accept 50 answers given by other contributors
Awarded to John D'Errico on 20 Jul 2017
36 Month Streak 20 Jul 2017Contribute at least one answer each month for 36 consecutive months
Awarded to John D'Errico on 20 Jul 2017
Master 22 Feb 2019
Revival Level 4 15 Nov 2020Answer 50 questions that were unanswered for more than 30 days
Awarded to John D'Errico on 15 Nov 2020
Editor's pick for... 17 Mar 20231 of your answers has been picked for excellence by MATLAB Answers Editors
Awarded to John D'Errico on 17 Mar 2023
Most Accepted 2023 01 Jan 2024Top ten contributors whose answers received the most acceptances in 2023
Awarded to John D'Errico on 01 Jan 2024
Cody Badge
Tutto
CUP Challenge Master 21 Aug 2016Solve all the problems in CUP Challenge
Awarded to John D'Errico on 21 Aug 2016
Promoter 13 Oct 2016Like a problem or solution
Awarded to John D'Errico on 13 Oct 2016
Commenter 28 Jan 2012Comment on a problem or solution
Awarded to John D'Errico on 28 Jan 2012
Solver 28 Jan 2012Solve a problem for the first time
Awarded to John D'Errico on 28 Jan 2012
Speed Demon 28 Aug 2016Be the first to solve a problem
Awarded to John D'Errico on 28 Aug 2016
Creator 22 Jul 2016Create a problem
Awarded to John D'Errico on 22 Jul 2016
Quiz Master 10 Sep 2020Obtain 50 solvers for a problem you have created
Awarded to John D'Errico on 10 Sep 2020
File Exchange Badge
Tutto
First Submission 09 Oct 2019Publish your first submission
Awarded to John D'Errico on 09 Oct 2019
5-Star Galaxy Level 5 09 Oct 2019Your submissions received 25 five star ratings
Awarded to John D'Errico on 09 Oct 2019
First Review 09 Oct 2019Publish your first review
Awarded to John D'Errico on 09 Oct 2019
Editor's Pick 09 Oct 2019Your submission is selected as "Pick of The Week"
Awarded to John D'Errico on 09 Oct 2019
Personal Best... 01 Nov 2019Your submissions were downloaded 1000 or more times in a month
Awarded to John D'Errico on 01 Nov 2019
Top Downloads 2019 02 Jan 2020Top ten contributors with the most downloaded submissions in 2019
Awarded to John D'Errico on 02 Jan 2020
Top Downloads 2020 04 Jan 2021Top ten contributors with the most downloaded submissions in 2020
Awarded to John D'Errico on 04 Jan 2021
Top Downloads 2021 06 Jan 2022Top ten contributors with the most downloaded submissions in 2021
Awarded to John D'Errico on 06 Jan 2022
Top Downloads 2022 03 Jan 2023Top ten contributors with the most downloaded submissions in 2022
Awarded to John D'Errico on 03 Jan 2023
Top Downloads 2023 19 Jan 2024Top ten contributors with the most downloaded submissions in 2023
Awarded to John D'Errico on 19 Jan 2024
Top Downloads 2024 07 Jan 2025Top ten contributors with the most downloaded submissions in 2024
Awarded to John D'Errico on 07 Jan 2025
MATLAB Answers Badge
TuttoFirst Answer 20 Jul 2017Knowledgeable Level 5 20 Jul 2017Thankful Level 5 20 Jul 201736 Month Streak 20 Jul 2017Master 22 Feb 2019Revival Level 4 15 Nov 2020Editor's pick for... 17 Mar 2023Most Accepted 2023 01 Jan 2024
Provide your first answer ever to someone else's question
Awarded to John D'Errico on 20 Jul 2017
100 of your answers have been accepted
Awarded to John D'Errico on 20 Jul 2017
Accept 50 answers given by other contributors
Awarded to John D'Errico on 20 Jul 2017
Contribute at least one answer each month for 36 consecutive months
Awarded to John D'Errico on 20 Jul 2017
Answer 50 questions that were unanswered for more than 30 days
Awarded to John D'Errico on 15 Nov 2020
1 of your answers has been picked for excellence by MATLAB Answers Editors
Awarded to John D'Errico on 17 Mar 2023
Top ten contributors whose answers received the most acceptances in 2023
Awarded to John D'Errico on 01 Jan 2024
Cody Badge
TuttoCUP Challenge Master 21 Aug 2016Promoter 13 Oct 2016Commenter 28 Jan 2012Solver 28 Jan 2012Speed Demon 28 Aug 2016Creator 22 Jul 2016Quiz Master 10 Sep 2020
Solve all the problems in CUP Challenge
Awarded to John D'Errico on 21 Aug 2016
Like a problem or solution
Awarded to John D'Errico on 13 Oct 2016
Comment on a problem or solution
Awarded to John D'Errico on 28 Jan 2012
Solve a problem for the first time
Awarded to John D'Errico on 28 Jan 2012
Be the first to solve a problem
Awarded to John D'Errico on 28 Aug 2016
Create a problem
Awarded to John D'Errico on 22 Jul 2016
Obtain 50 solvers for a problem you have created
Awarded to John D'Errico on 10 Sep 2020
File Exchange Badge
TuttoFirst Submission 09 Oct 20195-Star Galaxy Level 5 09 Oct 2019First Review 09 Oct 2019Editor's Pick 09 Oct 2019Personal Best... 01 Nov 2019Top Downloads 2019 02 Jan 2020Top Downloads 2020 04 Jan 2021Top Downloads 2021 06 Jan 2022Top Downloads 2022 03 Jan 2023Top Downloads 2023 19 Jan 2024Top Downloads 2024 07 Jan 2025
Publish your first submission
Awarded to John D'Errico on 09 Oct 2019
Your submissions received 25 five star ratings
Awarded to John D'Errico on 09 Oct 2019
Publish your first review
Awarded to John D'Errico on 09 Oct 2019
Your submission is selected as "Pick of The Week"
Awarded to John D'Errico on 09 Oct 2019
Your submissions were downloaded 1000 or more times in a month
Awarded to John D'Errico on 01 Nov 2019
Top ten contributors with the most downloaded submissions in 2019
Awarded to John D'Errico on 02 Jan 2020
Top ten contributors with the most downloaded submissions in 2020
Awarded to John D'Errico on 04 Jan 2021
Top ten contributors with the most downloaded submissions in 2021
Awarded to John D'Errico on 06 Jan 2022
Top ten contributors with the most downloaded submissions in 2022
Awarded to John D'Errico on 03 Jan 2023
Top ten contributors with the most downloaded submissions in 2023
Awarded to John D'Errico on 19 Jan 2024
Top ten contributors with the most downloaded submissions in 2024
Awarded to John D'Errico on 07 Jan 2025
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