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.
Statistics
62 Files
Cody HighlightsRANK
11
of 279,878
REPUTATION
19,994
CONTRIBUTIONS
15 Questions
7,071 Answers
ANSWER ACCEPTANCE
40.0%
VOTES RECEIVED
4,297
RANK
4 of 18,773
REPUTATION
63,440
AVERAGE RATING
4.80
CONTRIBUTIONS
62 Files
DOWNLOADS
1355
ALL TIME DOWNLOADS
571556
CONTRIBUTIONS
0 Posts
CONTRIBUTIONS
0 Public Channels
AVERAGE RATING
CONTRIBUTIONS
1 Highlight
AVERAGE NO. OF LIKES
8
1 of your answers has been picked for excellence by MATLAB Answers Editors
Awarded to John D'Errico on 17 Mar 2023
Answer 50 questions that were unanswered for more than 30 days
Awarded to John D'Errico on 15 Nov 2020
Obtain 50 solvers for a problem you have created
Awarded to John D'Errico on 10 Sep 2020
Like a problem or solution
Awarded to John D'Errico on 13 Oct 2016
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 2021
Awarded to John D'Errico on 06 Jan 2022
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 2019
Awarded to John D'Errico on 02 Jan 2020
Your submissions were downloaded 1000 or more times in a month
Awarded to John D'Errico on 01 Nov 2019
Your submission is selected as "Pick of The Week"
Awarded to John D'Errico on 09 Oct 2019
Publish your first review
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
Content Feed
Submitted
randpoly
Generate N uniformly distributed points inside a supplied polygon (or polyshape)
3 months ago | 1 download |
Submitted
allcrossings
Locate all intersections of a pair of functions f1 and f2, on a finite domain
3 months ago | 0 downloads |
Submitted
num2bin
Expression of all numbers in a variety of binary forms.
5 months ago | 3 downloads |
Submitted
A limited set of basic number theoretic tools
Various tools for working with integers and their factors, primes, congruences, etc.
5 months ago | 2 downloads |
Submitted
minkowskiSum
Compute the Minkowski sum of any two polygons or polyshapes, convex or concave.
6 months ago | 6 downloads |
Submitted
randFixedLinearCombination
Uniform random samples over a n-dimensional hyper-rectangle, subject to a linear equality constraint
2 years ago | 5 downloads |
Submitted
Eigenshuffle
Consistently sorted eigenvalue and eigenvector sequences
3 years ago | 30 downloads |
Submitted
Divisors of a number, perfect, amicable, and sociable number
Tools to work (and play) with the divisors of a number
4 years ago | 1 download |
Submitted
HPF - a big decimal class
High precision floating point arithmetic, a new class written in MATLAB
5 years ago | 44 downloads |
Submitted
The permanent of any matrix (square or not)
The permanent of any matrix, square or not
6 years ago | 1 download |
Submitted
SLM - Shape Language Modeling
Least squares spline modeling using shape primitives
6 years ago | 78 downloads |
Submitted
The Fibonacci Sequence
Efficient computation of Fibonacci and Lucas numbers
6 years ago | 6 downloads |
Submitted
base2base(Nstart,bstart,bend)
Numeric base conversion between any two numeric bases, for any size integer.
7 years ago | 3 downloads |
Submitted
Optimization Tips and Tricks
Tips and tricks for use of the optimization toolbox, linear and nonlinear regression.
7 years ago | 14 downloads |
Submitted
movingstd & movingstd2
A (fast) windowed std on a time series (or array)
7 years ago | 1 download |
Submitted
Surface Fitting using gridfit
Model 2-d surfaces from scattered data
7 years ago | 98 downloads |
Submitted
Batched partitioned nonlinear least squares
Speed up when you have a very large number of nonlinear least squares problems, but with one model
8 years ago | 2 downloads |
Submitted
export_search_path
Allows the user to transfer your search path from an old MATLAB release to a new release
8 years ago | 1 download |
Submitted
Adaptive numerical limit (and residue) estimation
Numerical extrapolation of a limit (with an error estimate) from only function values
8 years ago | 1 download |
Submitted
Variable Precision Integer Arithmetic
Arithmetic with integers of fully arbitrary size. Arrays and vectors of vpi numbers are supported.
8 years ago | 41 downloads |
Submitted
Symbolic Polynomial Manipulation
Symbolic polynomial manipulation as an exercise in OOP
8 years ago | 27 downloads |
Submitted
Adaptive Robust Numerical Differentiation
Numerical derivative of an analytically supplied function, also gradient, Jacobian & Hessian
8 years ago | 60 downloads |
Submitted
A suite of minimal bounding objects
Suite of tools to compute minimal bounding circles, rectangles, triangles, spheres, incircles, etc.
9 years ago | 48 downloads |
Submitted
distance2curve
Find the closest point on a (n-dimensional) curve to any given point or set of points
10 years ago | 26 downloads |
Submitted
Inverse (integrated) gradient
Vectorized & fully sparse 1-d, 2-d, & 3-d integrated gradients
10 years ago | 12 downloads |
Submitted
Inhull
Efficient test for points inside a convex hull in n dimensions
10 years ago | 22 downloads |
Submitted
interparc
Distance based interpolation along a general curve in space
11 years ago | 78 downloads |
You can also select a web site from the following list
Americas
- América Latina (Español)
- Canada (English)
- United States (English)
Europe
- Belgium (English)
- Denmark (English)
- Deutschland (Deutsch)
- España (Español)
- Finland (English)
- France (Français)
- Ireland (English)
- Italia (Italiano)
- Luxembourg (English)
- Netherlands (English)
- Norway (English)
- Österreich (Deutsch)
- Portugal (English)
- Sweden (English)
- Switzerland
- United Kingdom (English)
Asia Pacific
- Australia (English)
- India (English)
- New Zealand (English)
- 中国
- 日本Japanese (日本語)
- 한국Korean (한국어)