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Kenneth Johnson


KJ Innovation

Last seen: etwa 2 Monate vor Aktiv seit 2011

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  • Personal Best Downloads Level 1
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Gesendet


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

4 Monate vor | 5 Downloads |

Gesendet


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

5 Monate vor | 2 Downloads |

Gesendet


pageexpm
Paged matrix exponential function

9 Monate vor | 1 Download |

Beantwortet
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...

9 Monate vor | 0

| akzeptiert

Frage


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...

9 Monate vor | 2 Antworten | 1

2

Antworten

Frage


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...

10 Monate vor | 1 Antwort | 3

1

Antwort

Gesendet


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

10 Monate vor | 1 Download |

Frage


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...

10 Monate vor | 2 Antworten | 1

2

Antworten

Gesendet


bsxi
Array indexing for binary singleton expansion

10 Monate vor | 1 Download |

Frage


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...

11 Monate vor | 0 Antworten | 10

0

Antworten

Gesendet


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

mehr als ein Jahr vor | 4 Downloads |

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Frage


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...

mehr als ein Jahr vor | 1 Antwort | 3

1

Antwort

Gesendet


permn
Generate permutations of 1:n and permutation parity.

fast 2 Jahre vor | 3 Downloads |

Gesendet


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

fast 2 Jahre vor | 1 Download |

Gesendet


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

fast 2 Jahre vor | 3 Downloads |

Gesendet


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

mehr als 6 Jahre vor | 2 Downloads |

Gesendet


serpind.m
serpentine traversal of an N-dimensional array

mehr als 6 Jahre vor | 1 Download |

Gesendet


fgridmin.m
global minimization utility

mehr als 6 Jahre vor | 1 Download |

Gesendet


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

mehr als 7 Jahre vor | 1 Download |

Gesendet


Scalar
The Scalar base class disallows non-scalar instantiation.

fast 8 Jahre vor | 1 Download |

Gesendet


Matrix exponential
Matrix exponential algorithm with improved numerical precision

mehr als 8 Jahre vor | 1 Download |

Gesendet


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

mehr als 8 Jahre vor | 1 Download |

Gesendet


matrix power
more efficient than MATLAB's mpower function

fast 9 Jahre vor | 1 Download |

Gesendet


elementwise power
more efficient than MATLAB's power function

fast 9 Jahre vor | 1 Download |

Gesendet


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

etwa 10 Jahre vor | 2 Downloads |

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Gesendet


Cornu Spline
two-point spline with slope constraints

etwa 11 Jahre vor | 2 Downloads |

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Gesendet


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

etwa 11 Jahre vor | 5 Downloads |

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