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John D'Errico


Retired

Last seen: Today Active since 2006

DON'T contact me, as too many students then decide I am their personal consultant if I allow it. Anyway. I won't answer questions. PERIOD. I don't do your homework. I won't do consulting by mail. A retired mathematician, numerical analyst, woodworker, bridge player.

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Submitted


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

1 month ago | 2 downloads |

Submitted


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

1 month ago | 3 downloads |

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

2 months ago | 9 downloads |

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

2 years ago | 4 downloads |

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Eigenshuffle
Consistently sorted eigenvalue and eigenvector sequences

2 years ago | 26 downloads |

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

4 years ago | 2 downloads |

Submitted


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

5 years ago | 23 downloads |

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Partitions of an integer
List all partitions of an integer

5 years ago | 9 downloads |

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

5 years ago | 1 download |

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

6 years ago | 96 downloads |

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The Fibonacci Sequence
Efficient computation of Fibonacci and Lucas numbers

6 years ago | 2 downloads |

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

6 years ago | 1 download |

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polyfitn
Polynomial modeling in 1 or n dimensions

7 years ago | 172 downloads |

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

7 years ago | 13 downloads |

Submitted


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

7 years ago | 4 downloads |

Submitted


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

7 years ago | 85 downloads |

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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 | 1 download |

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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 | 3 downloads |

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

8 years ago | 70 downloads |

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Symbolic Polynomial Manipulation
Symbolic polynomial manipulation as an exercise in OOP

8 years ago | 27 downloads |

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

8 years ago | 64 downloads |

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

8 years ago | 40 downloads |

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nearestSPD
Finding the nearest positive definite matrix

9 years ago | 24 downloads |

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

10 years ago | 25 downloads |

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

10 years ago | 16 downloads |

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

10 years ago | 27 downloads |

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interparc
Distance based interpolation along a general curve in space

10 years ago | 75 downloads |

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IPDM: Inter-Point Distance Matrix
An efficient and accurate Inter-Point Distance Matrix

10 years ago | 11 downloads |

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inpaint_nans
Interpolates (& extrapolates) NaN elements in a 2d array.

10 years ago | 93 downloads |

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