John D'Errico

Retired

Last seen: 1 dag ago | Active since 2006

Followers: 31 Following: 0

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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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Submitted

randpoly
Generate N uniformly distributed points inside a supplied polygon (or polyshape)

meer dan 2 jaar ago | 1 download |

0.0 / 5

Submitted

allcrossings
Locate all intersections of a pair of functions f1 and f2, on a finite domain

meer dan 2 jaar ago | 1 download |

0.0 / 5

Submitted

num2bin
Expression of all numbers in a variety of binary forms.

meer dan 2 jaar ago | 2 downloads |

0.0 / 5

Submitted

A limited set of basic number theoretic tools
Various tools for working with integers and their factors, primes, congruences, etc.

meer dan 2 jaar ago | 2 downloads |

5.0 / 5

Submitted

minkowskiSum
Compute the Minkowski sum of any two polygons or polyshapes, convex or concave.

meer dan 2 jaar ago | 1 download |

0.0 / 5

Submitted

randFixedLinearCombination
Uniform random samples over a n-dimensional hyper-rectangle, subject to a linear equality constraint

bijna 5 jaar ago | 2 downloads |

4.5 / 5

Submitted

Eigenshuffle
Consistently sorted eigenvalue and eigenvector sequences

ongeveer 5 jaar ago | 17 downloads |

4.8 / 5

Submitted

Divisors of a number, perfect, amicable, and sociable number
Tools to work (and play) with the divisors of a number

meer dan 6 jaar ago | 1 download |

5.0 / 5

Submitted

HPF - a big decimal class
High precision floating point arithmetic, a new class written in MATLAB

meer dan 7 jaar ago | 9 downloads |

4.8 / 5

Submitted

Partitions of an integer
List all partitions of an integer

meer dan 7 jaar ago | 8 downloads |

4.9 / 5

Submitted

The permanent of any matrix (square or not)
The permanent of any matrix, square or not

ongeveer 8 jaar ago | 1 download |

0.0 / 5

Submitted

SLM - Shape Language Modeling
Least squares spline modeling using shape primitives

ongeveer 8 jaar ago | 51 downloads |

5.0 / 5

Submitted

The Fibonacci Sequence
Efficient computation of Fibonacci and Lucas numbers

meer dan 8 jaar ago | 1 download |

5.0 / 5

Submitted

base2base(Nstart,bstart,bend)
Numeric base conversion between any two numeric bases, for any size integer.

bijna 9 jaar ago | 1 download |

5.0 / 5

Submitted

polyfitn
Polynomial modeling in 1 or n dimensions

ongeveer 9 jaar ago | 127 downloads |

4.9 / 5

Submitted

Optimization Tips and Tricks
Tips and tricks for use of the optimization toolbox, linear and nonlinear regression.

ongeveer 9 jaar ago | 10 downloads |

4.8 / 5

Submitted

movingstd & movingstd2
A (fast) windowed std on a time series (or array)

meer dan 9 jaar ago | 3 downloads |

4.8 / 5

Submitted

Surface Fitting using gridfit
Model 2-d surfaces from scattered data

meer dan 9 jaar ago | 67 downloads |

4.9 / 5

Submitted

Batched partitioned nonlinear least squares
Speed up when you have a very large number of nonlinear least squares problems, but with one model

ongeveer 10 jaar ago | 1 download |

5.0 / 5

Submitted

export_search_path
Allows the user to transfer your search path from an old MATLAB release to a new release

meer dan 10 jaar ago | 2 downloads |

5.0 / 5

Submitted

Adaptive numerical limit (and residue) estimation
Numerical extrapolation of a limit (with an error estimate) from only function values

meer dan 10 jaar ago | 1 download |

5.0 / 5

Submitted

Variable Precision Integer Arithmetic
Arithmetic with integers of fully arbitrary size. Arrays and vectors of vpi numbers are supported.

meer dan 10 jaar ago | 11 downloads |

4.9 / 5

Submitted

Symbolic Polynomial Manipulation
Symbolic polynomial manipulation as an exercise in OOP

meer dan 10 jaar ago | 6 downloads |

4.9 / 5

Submitted

Adaptive Robust Numerical Differentiation
Numerical derivative of an analytically supplied function, also gradient, Jacobian & Hessian

meer dan 10 jaar ago | 60 downloads |

4.8 / 5

Submitted

A suite of minimal bounding objects
Suite of tools to compute minimal bounding circles, rectangles, triangles, spheres, incircles, etc.

ongeveer 11 jaar ago | 30 downloads |

4.8 / 5

Submitted

nearestSPD
Finding the nearest positive definite matrix

bijna 12 jaar ago | 26 downloads |

4.9 / 5

Submitted

distance2curve
Find the closest point on a (n-dimensional) curve to any given point or set of points

meer dan 12 jaar ago | 9 downloads |

5.0 / 5

Submitted

Inverse (integrated) gradient
Vectorized & fully sparse 1-d, 2-d, & 3-d integrated gradients

meer dan 12 jaar ago | 8 downloads |

4.8 / 5

Submitted

Inhull
Efficient test for points inside a convex hull in n dimensions

bijna 13 jaar ago | 37 downloads |

4.7 / 5

Submitted

interparc
Distance based interpolation along a general curve in space

bijna 13 jaar ago | 23 downloads |

5.0 / 5