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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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Feeds
Submitted
randpoly
Generate N uniformly distributed points inside a supplied polygon (or polyshape)
1 year ago | 5 downloads |
![Thumbnail](/matlabcentral/mlc-downloads/downloads/f098195d-7286-410d-b6f7-2a4c8234bc0d/2df2b6ff-b827-4888-9dbf-ccdbed90aa22/images/1677762004.jpg)
Submitted
allcrossings
Locate all intersections of a pair of functions f1 and f2, on a finite domain
1 year ago | 1 download |
Submitted
num2bin
Expression of all numbers in a variety of binary forms.
1 year ago | 3 downloads |
Submitted
A limited set of basic number theoretic tools
Various tools for working with integers and their factors, primes, congruences, etc.
1 year ago | 3 downloads |
Submitted
minkowskiSum
Compute the Minkowski sum of any two polygons or polyshapes, convex or concave.
1 year ago | 4 downloads |
Submitted
randFixedLinearCombination
Uniform random samples over a n-dimensional hyper-rectangle, subject to a linear equality constraint
4 years ago | 3 downloads |
Submitted
Eigenshuffle
Consistently sorted eigenvalue and eigenvector sequences
4 years ago | 22 downloads |
![Thumbnail](/matlabcentral/mlc-downloads/downloads/e560b2b3-4a80-11e4-9553-005056977bd0/397065e5-a6a5-4732-ba1a-2ca71f0b8a8e/images/screenshot.jpg)
Submitted
Divisors of a number, perfect, amicable, and sociable number
Tools to work (and play) with the divisors of a number
5 years ago | 1 download |
Submitted
HPF - a big decimal class
High precision floating point arithmetic, a new class written in MATLAB
6 years ago | 17 downloads |
Submitted
The permanent of any matrix (square or not)
The permanent of any matrix, square or not
7 years ago | 1 download |
Submitted
SLM - Shape Language Modeling
Least squares spline modeling using shape primitives
7 years ago | 70 downloads |
![Thumbnail](/matlabcentral/mlc-downloads/downloads/submissions/24443/versions/15/screenshot.jpg)
Submitted
The Fibonacci Sequence
Efficient computation of Fibonacci and Lucas numbers
7 years ago | 1 download |
Submitted
base2base(Nstart,bstart,bend)
Numeric base conversion between any two numeric bases, for any size integer.
8 years ago | 2 downloads |
Submitted
Optimization Tips and Tricks
Tips and tricks for use of the optimization toolbox, linear and nonlinear regression.
8 years ago | 9 downloads |
Submitted
movingstd & movingstd2
A (fast) windowed std on a time series (or array)
8 years ago | 3 downloads |
Submitted
Surface Fitting using gridfit
Model 2-d surfaces from scattered data
8 years ago | 75 downloads |
![Thumbnail](/matlabcentral/mlc-downloads/downloads/submissions/8998/versions/4/screenshot.jpg)
Submitted
Batched partitioned nonlinear least squares
Speed up when you have a very large number of nonlinear least squares problems, but with one model
9 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
9 years ago | 1 download |
Submitted
Adaptive numerical limit (and residue) estimation
Numerical extrapolation of a limit (with an error estimate) from only function values
9 years ago | 3 downloads |
Submitted
Variable Precision Integer Arithmetic
Arithmetic with integers of fully arbitrary size. Arrays and vectors of vpi numbers are supported.
9 years ago | 14 downloads |
Submitted
Symbolic Polynomial Manipulation
Symbolic polynomial manipulation as an exercise in OOP
9 years ago | 21 downloads |
Submitted
Adaptive Robust Numerical Differentiation
Numerical derivative of an analytically supplied function, also gradient, Jacobian & Hessian
9 years ago | 25 downloads |
Submitted
A suite of minimal bounding objects
Suite of tools to compute minimal bounding circles, rectangles, triangles, spheres, incircles, etc.
10 years ago | 27 downloads |
![Thumbnail](/matlabcentral/mlc-downloads/downloads/submissions/34767/versions/3/screenshot.jpg)
Submitted
distance2curve
Find the closest point on a (n-dimensional) curve to any given point or set of points
11 years ago | 14 downloads |
![Thumbnail](/matlabcentral/mlc-downloads/downloads/submissions/34869/versions/2/screenshot.jpg)
Submitted
Inverse (integrated) gradient
Vectorized & fully sparse 1-d, 2-d, & 3-d integrated gradients
11 years ago | 6 downloads |
Submitted
Inhull
Efficient test for points inside a convex hull in n dimensions
12 years ago | 26 downloads |
![Thumbnail](/matlabcentral/mlc-downloads/downloads/submissions/10226/versions/3/screenshot.jpg)
Submitted
interparc
Distance based interpolation along a general curve in space
12 years ago | 58 downloads |
![Thumbnail](/matlabcentral/mlc-downloads/downloads/submissions/34874/versions/4/screenshot.jpg)