John D'Errico
Retired
DON'T contact me. I won't answer questions. PERIOD. I don't do your homework. I won't do consulting. A retired mathematician, numerical analyst, woodworker, bridge player.
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57 Files
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11 Questions
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57 Files
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Answer 50 questions that were unanswered for more than 30 days
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Top ten contributors with the most downloaded submissions in 2021
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Top ten contributors with the most downloaded submissions in 2020
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Top ten contributors with the most downloaded submissions in 2019
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Content Feed
Submitted
randFixedLinearCombination
Uniform random samples over a n-dimensional hyper-rectangle, subject to a linear equality constraint
ongeveer 2 jaar ago | 1 download |
Submitted
Eigenshuffle
Consistently sorted eigenvalue and eigenvector sequences
meer dan 2 jaar ago | 26 downloads |
Submitted
Divisors of a number, perfect, amicable, and sociable number
Tools to work (and play) with the divisors of a number
meer dan 3 jaar ago | 1 download |
Submitted
HPF - a big decimal class
High precision floating point arithmetic, a new class written in MATLAB
meer dan 4 jaar ago | 28 downloads |
Submitted
Partitions of an integer
List all partitions of an integer
meer dan 4 jaar ago | 11 downloads |
Submitted
The permanent of any matrix (square or not)
The permanent of any matrix, square or not
meer dan 5 jaar ago | 1 download |
Submitted
SLM - Shape Language Modeling
Least squares spline modeling using shape primitives
meer dan 5 jaar ago | 55 downloads |
Submitted
The Fibonacci Sequence
Efficient computation of Fibonacci and Lucas numbers
meer dan 5 jaar ago | 4 downloads |
Submitted
base2base(Nstart,bstart,bend)
Numeric base conversion between any two numeric bases, for any size integer.
ongeveer 6 jaar ago | 3 downloads |
Submitted
Optimization Tips and Tricks
Tips and tricks for use of the optimization toolbox, linear and nonlinear regression.
meer dan 6 jaar ago | 12 downloads |
Submitted
movingstd & movingstd2
A (fast) windowed std on a time series (or array)
meer dan 6 jaar ago | 5 downloads |
Submitted
Surface Fitting using gridfit
Model 2-d surfaces from scattered data
meer dan 6 jaar ago | 87 downloads |
Submitted
Batched partitioned nonlinear least squares
Speed up when you have a very large number of nonlinear least squares problems, but with one model
meer dan 7 jaar ago | 4 downloads |
Submitted
export_search_path
Allows the user to transfer your search path from an old MATLAB release to a new release
meer dan 7 jaar ago | 2 downloads |
Submitted
Adaptive numerical limit (and residue) estimation
Numerical extrapolation of a limit (with an error estimate) from only function values
meer dan 7 jaar ago | 2 downloads |
Submitted
Variable Precision Integer Arithmetic
Arithmetic with integers of fully arbitrary size. Arrays and vectors of vpi numbers are supported.
meer dan 7 jaar ago | 41 downloads |
Submitted
Symbolic Polynomial Manipulation
Symbolic polynomial manipulation as an exercise in OOP
bijna 8 jaar ago | 29 downloads |
Submitted
Adaptive Robust Numerical Differentiation
Numerical derivative of an analytically supplied function, also gradient, Jacobian & Hessian
bijna 8 jaar ago | 51 downloads |
Submitted
A suite of minimal bounding objects
Suite of tools to compute minimal bounding circles, rectangles, triangles, spheres, incircles, etc.
meer dan 8 jaar ago | 29 downloads |
Submitted
nearestSPD
Finding the nearest positive definite matrix
ongeveer 9 jaar ago | 32 downloads |
Submitted
distance2curve
Find the closest point on a (n-dimensional) curve to any given point or set of points
meer dan 9 jaar ago | 28 downloads |
Submitted
Inverse (integrated) gradient
Vectorized & fully sparse 1-d, 2-d, & 3-d integrated gradients
bijna 10 jaar ago | 7 downloads |
Submitted
Inhull
Efficient test for points inside a convex hull in n dimensions
ongeveer 10 jaar ago | 31 downloads |
Submitted
interparc
Distance based interpolation along a general curve in space
ongeveer 10 jaar ago | 78 downloads |
Submitted
IPDM: Inter-Point Distance Matrix
An efficient and accurate Inter-Point Distance Matrix
ongeveer 10 jaar ago | 5 downloads |
Submitted
inpaint_nans
Interpolates (& extrapolates) NaN elements in a 2d array.
ongeveer 10 jaar ago | 117 downloads |
Submitted
FresnelS and FresnelC
Efficient and accurate computation of the Fresnel sine and cosine integrals
meer dan 10 jaar ago | 2 downloads |
Submitted
fminsearchbnd, fminsearchcon
Bound constrained optimization using fminsearch
meer dan 10 jaar ago | 144 downloads |
Submitted
arclength
Compute the arclength of a general curve in any number of dimensions
meer dan 10 jaar ago | 31 downloads |
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