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
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Content Feed
A soumis
randpoly
Generate N uniformly distributed points inside a supplied polygon (or polyshape)
3 mois il y a | 1 téléchargement |
A soumis
allcrossings
Locate all intersections of a pair of functions f1 and f2, on a finite domain
3 mois il y a | 1 téléchargement |
A soumis
num2bin
Expression of all numbers in a variety of binary forms.
5 mois il y a | 3 téléchargements |
A soumis
A limited set of basic number theoretic tools
Various tools for working with integers and their factors, primes, congruences, etc.
5 mois il y a | 2 téléchargements |
A soumis
minkowskiSum
Compute the Minkowski sum of any two polygons or polyshapes, convex or concave.
6 mois il y a | 6 téléchargements |
A soumis
randFixedLinearCombination
Uniform random samples over a n-dimensional hyper-rectangle, subject to a linear equality constraint
plus de 2 ans il y a | 5 téléchargements |
A soumis
Eigenshuffle
Consistently sorted eigenvalue and eigenvector sequences
presque 3 ans il y a | 32 téléchargements |
A soumis
Divisors of a number, perfect, amicable, and sociable number
Tools to work (and play) with the divisors of a number
plus de 4 ans il y a | 1 téléchargement |
A soumis
HPF - a big decimal class
High precision floating point arithmetic, a new class written in MATLAB
environ 5 ans il y a | 44 téléchargements |
A soumis
Partitions of an integer
List all partitions of an integer
environ 5 ans il y a | 9 téléchargements |
A soumis
The permanent of any matrix (square or not)
The permanent of any matrix, square or not
presque 6 ans il y a | 1 téléchargement |
A soumis
SLM - Shape Language Modeling
Least squares spline modeling using shape primitives
environ 6 ans il y a | 68 téléchargements |
A soumis
The Fibonacci Sequence
Efficient computation of Fibonacci and Lucas numbers
plus de 6 ans il y a | 6 téléchargements |
A soumis
base2base(Nstart,bstart,bend)
Numeric base conversion between any two numeric bases, for any size integer.
presque 7 ans il y a | 3 téléchargements |
A soumis
polyfitn
Polynomial modeling in 1 or n dimensions
environ 7 ans il y a | 244 téléchargements |
A soumis
Optimization Tips and Tricks
Tips and tricks for use of the optimization toolbox, linear and nonlinear regression.
environ 7 ans il y a | 15 téléchargements |
A soumis
movingstd & movingstd2
A (fast) windowed std on a time series (or array)
environ 7 ans il y a | 1 téléchargement |
A soumis
Surface Fitting using gridfit
Model 2-d surfaces from scattered data
environ 7 ans il y a | 96 téléchargements |
A soumis
Batched partitioned nonlinear least squares
Speed up when you have a very large number of nonlinear least squares problems, but with one model
environ 8 ans il y a | 2 téléchargements |
A soumis
export_search_path
Allows the user to transfer your search path from an old MATLAB release to a new release
environ 8 ans il y a | 1 téléchargement |
A soumis
Adaptive numerical limit (and residue) estimation
Numerical extrapolation of a limit (with an error estimate) from only function values
environ 8 ans il y a | 1 téléchargement |
A soumis
Variable Precision Integer Arithmetic
Arithmetic with integers of fully arbitrary size. Arrays and vectors of vpi numbers are supported.
plus de 8 ans il y a | 41 téléchargements |
A soumis
Symbolic Polynomial Manipulation
Symbolic polynomial manipulation as an exercise in OOP
plus de 8 ans il y a | 27 téléchargements |
A soumis
Adaptive Robust Numerical Differentiation
Numerical derivative of an analytically supplied function, also gradient, Jacobian & Hessian
plus de 8 ans il y a | 63 téléchargements |
A soumis
A suite of minimal bounding objects
Suite of tools to compute minimal bounding circles, rectangles, triangles, spheres, incircles, etc.
environ 9 ans il y a | 49 téléchargements |
A soumis
nearestSPD
Finding the nearest positive definite matrix
presque 10 ans il y a | 45 téléchargements |
A soumis
distance2curve
Find the closest point on a (n-dimensional) curve to any given point or set of points
plus de 10 ans il y a | 27 téléchargements |
A soumis
Inverse (integrated) gradient
Vectorized & fully sparse 1-d, 2-d, & 3-d integrated gradients
plus de 10 ans il y a | 12 téléchargements |
A soumis
Inhull
Efficient test for points inside a convex hull in n dimensions
plus de 10 ans il y a | 24 téléchargements |
A soumis
interparc
Distance based interpolation along a general curve in space
presque 11 ans il y a | 79 téléchargements |
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