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Kenneth Johnson


KJ Innovation

Last seen: circa un anno fa |  Attivo dal 2011

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Inviato


Class DAA, "Derivative-Augmented Array"
Class DAA, "Derivative-Augmented Array", is a general-purpose automatic differentiation engine implemented in MATLAB.

oltre un anno fa | 1 download |

Inviato


Padé coefficients
Calculate Padé coefficients corresponding to a truncated Taylor series.

quasi 2 anni fa | 1 download |

Inviato


pageexpm
Paged matrix exponential function

circa 2 anni fa | 3 download |

Risposto
Why does pagemldivide not give Singular Matrix warnings?
Summary of response from Technical Support: The 'help' for 'pagemldivide' states that the function never warns for ill-condit...

circa 2 anni fa | 0

| accettato

Domanda


Why does pagemldivide not give Singular Matrix warnings?
The new pagemldivide function in R2022a Prerelease (I think also in Parallel Computing Toolbox) doesn't give any Singular Matrix...

circa 2 anni fa | 2 risposte | 1

2

risposte

Domanda


Why is subscripted assignment so inefficient?
Why is MATLAB's subscripted assignment so abysmally inefficient with more than 2 subscripts? e.g., >> clear, a = []; tic, for j...

circa 2 anni fa | 1 risposta | 3

1

risposta

Inviato


Generalized matrix operators
The functions mtimes_.m, mldivide_.m, and mrdivide_.m generalize the corresponding MATLAB functions.

circa 2 anni fa | 2 download |

Domanda


MATLAB's inefficient copy-on-write implementation
MATLAB's copy-on-write memory management seems to have a serious defect, which I think is the reason behind the abysmal performa...

circa 2 anni fa | 2 risposte | 1

2

risposte

Inviato


bsxi
Array indexing for binary singleton expansion

circa 2 anni fa | 1 download |

Domanda


In what way is the new R2021b Editor UI "improved"?
I find the "new and improved" Editor UI in R2021b to be extremely irritating, in no way better than R2021a. How did this get pas...

oltre 2 anni fa | 3 risposte | 11

3

risposte

Inviato


Linear differential equation solver (lde.m)
solves a linear, first-order, vector differential equation

quasi 3 anni fa | 2 download |

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Domanda


Is this a bug in eig?
This issue came up with the roots function (see roots_ on File Exchange), where eig was failing on the companion matrix. Follow...

circa 3 anni fa | 1 risposta | 3

1

risposta

Inviato


permn
Generate permutations of 1:n and permutation parity.

circa 3 anni fa | 2 download |

Inviato


str2subs, subs2str
Convert a string to/from a subscript struct for use in subsref and subsasgn.

oltre 3 anni fa | 1 download |

Inviato


roots_
roots_(c) does not return zero when c(end) is nonzero.

oltre 3 anni fa | 3 download |

Inviato


fminsearch_(funfcn,x0,options,varargin)
Works around a bug (or design defect) in fminsearch.

quasi 8 anni fa | 4 download |

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serpind.m
serpentine traversal of an N-dimensional array

circa 8 anni fa | 1 download |

Inviato


fgridmin.m
global minimization utility

circa 8 anni fa | 1 download |

Inviato


Generalized Matrix Exponential
Solves Y'(t) = D(t)*Y(t) for Y(1) with Y(0) = I (identity matrix).

quasi 9 anni fa | 1 download |

Inviato


Scalar
The Scalar base class disallows non-scalar instantiation.

circa 9 anni fa | 1 download |

Inviato


Matrix exponential
Matrix exponential algorithm with improved numerical precision

circa 10 anni fa | 1 download |

Inviato


Matrix polynomial
Efficiently evaluate a polynomial with square-matrix argument and scalar coefficients.

circa 10 anni fa | 2 download |

Inviato


matrix power
more efficient than MATLAB's mpower function

oltre 10 anni fa | 1 download |

Inviato


elementwise power
more efficient than MATLAB's power function

oltre 10 anni fa | 1 download |

Inviato


Scanned-Spot-Array EUV Imaging for High-Volume Maskless Lithography
Design data and optical simulation code for maskless EUV lithography system

oltre 11 anni fa | 3 download |

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Inviato


Cornu Spline
two-point spline with slope constraints

oltre 12 anni fa | 1 download |

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Inviato


Complex Erf (Error Function), Fresnel Integrals
complex erf function

oltre 12 anni fa | 3 download |

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