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.
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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
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Awarded to John D'Errico on 01 Nov 2019
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Awarded to John D'Errico on 09 Oct 2019
Publish your first review
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Your submissions received 25 five star ratings
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Content Feed
Gesendet
randpoly
Generate N uniformly distributed points inside a supplied polygon (or polyshape)
3 Monate vor | 1 Download |
Gesendet
allcrossings
Locate all intersections of a pair of functions f1 and f2, on a finite domain
3 Monate vor | 0 Downloads |
Gesendet
num2bin
Expression of all numbers in a variety of binary forms.
5 Monate vor | 3 Downloads |
Gesendet
A limited set of basic number theoretic tools
Various tools for working with integers and their factors, primes, congruences, etc.
5 Monate vor | 2 Downloads |
Gesendet
minkowskiSum
Compute the Minkowski sum of any two polygons or polyshapes, convex or concave.
6 Monate vor | 8 Downloads |
Gesendet
randFixedLinearCombination
Uniform random samples over a n-dimensional hyper-rectangle, subject to a linear equality constraint
mehr als 2 Jahre vor | 5 Downloads |
Gesendet
Eigenshuffle
Consistently sorted eigenvalue and eigenvector sequences
etwa 3 Jahre vor | 27 Downloads |
Gesendet
Divisors of a number, perfect, amicable, and sociable number
Tools to work (and play) with the divisors of a number
mehr als 4 Jahre vor | 1 Download |
Gesendet
HPF - a big decimal class
High precision floating point arithmetic, a new class written in MATLAB
etwa 5 Jahre vor | 47 Downloads |
Gesendet
Partitions of an integer
List all partitions of an integer
etwa 5 Jahre vor | 11 Downloads |
Gesendet
The permanent of any matrix (square or not)
The permanent of any matrix, square or not
fast 6 Jahre vor | 1 Download |
Gesendet
SLM - Shape Language Modeling
Least squares spline modeling using shape primitives
etwa 6 Jahre vor | 71 Downloads |
Gesendet
The Fibonacci Sequence
Efficient computation of Fibonacci and Lucas numbers
mehr als 6 Jahre vor | 6 Downloads |
Gesendet
base2base(Nstart,bstart,bend)
Numeric base conversion between any two numeric bases, for any size integer.
fast 7 Jahre vor | 3 Downloads |
Gesendet
Optimization Tips and Tricks
Tips and tricks for use of the optimization toolbox, linear and nonlinear regression.
etwa 7 Jahre vor | 10 Downloads |
Gesendet
movingstd & movingstd2
A (fast) windowed std on a time series (or array)
etwa 7 Jahre vor | 1 Download |
Gesendet
Surface Fitting using gridfit
Model 2-d surfaces from scattered data
mehr als 7 Jahre vor | 99 Downloads |
Gesendet
Batched partitioned nonlinear least squares
Speed up when you have a very large number of nonlinear least squares problems, but with one model
etwa 8 Jahre vor | 2 Downloads |
Gesendet
export_search_path
Allows the user to transfer your search path from an old MATLAB release to a new release
etwa 8 Jahre vor | 1 Download |
Gesendet
Adaptive numerical limit (and residue) estimation
Numerical extrapolation of a limit (with an error estimate) from only function values
etwa 8 Jahre vor | 1 Download |
Gesendet
Variable Precision Integer Arithmetic
Arithmetic with integers of fully arbitrary size. Arrays and vectors of vpi numbers are supported.
mehr als 8 Jahre vor | 45 Downloads |
Gesendet
Symbolic Polynomial Manipulation
Symbolic polynomial manipulation as an exercise in OOP
mehr als 8 Jahre vor | 29 Downloads |
Gesendet
Adaptive Robust Numerical Differentiation
Numerical derivative of an analytically supplied function, also gradient, Jacobian & Hessian
mehr als 8 Jahre vor | 57 Downloads |
Gesendet
A suite of minimal bounding objects
Suite of tools to compute minimal bounding circles, rectangles, triangles, spheres, incircles, etc.
etwa 9 Jahre vor | 50 Downloads |
Gesendet
distance2curve
Find the closest point on a (n-dimensional) curve to any given point or set of points
mehr als 10 Jahre vor | 28 Downloads |
Gesendet
Inverse (integrated) gradient
Vectorized & fully sparse 1-d, 2-d, & 3-d integrated gradients
mehr als 10 Jahre vor | 12 Downloads |
Gesendet
Inhull
Efficient test for points inside a convex hull in n dimensions
fast 11 Jahre vor | 27 Downloads |
Gesendet
interparc
Distance based interpolation along a general curve in space
fast 11 Jahre vor | 71 Downloads |
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