knedlsepp
/ default.nix
Last active
June 15, 2020 16:40
How to pin a nix version in a default.nix file. (Override the pinned version via: nix-shell --arg nixpkgs '<nixpkgs>')
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| {nixpkgs ? null}: | |
| let | |
| sysPkg = import <nixpkgs> { }; | |
| pinnedPkg = sysPkg.fetchFromGitHub { | |
| owner = "NixOS"; | |
| repo = "nixpkgs"; | |
| rev = "cf62a27a326a9cdbb01d627b1faaea3a0d5e886c"; | |
| sha256 = "1q74ciqq5r17vidw2025x8idsncz9k7w60warrij4q7piaffgvd7"; | |
| }; | |
| pkgs = if nixpkgs==null then |
knedlsepp
/ exponentielle_regression_beispiel.ipynb
Last active
January 24, 2016 16:32
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knedlsepp
/ findGridConnectivity
Created
April 10, 2015 12:22
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| clear; | |
| data = [ 475. , 605.75, 1.; | |
| 571. , 586.5 , 2.; | |
| 233. , 558.5 , 3.; | |
| 669.5 , 562.75, 4.; | |
| 291.25, 546.25, 5.; | |
| 759. , 536.25, 6.; | |
| 362.5 , 531.5 , 7.; | |
| 448. , 513.5 , 8.; | |
| 834.5 , 510. , 9.; |
knedlsepp
/ computeBoundaries.m
Last active
August 29, 2015 14:17
Computing the faces and vertices of the boundary of an m-dimensional polytope residing in n-dimensional space.
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| %% %% Requirements: | |
| %% distancePointsAffineSpace: | |
| %% https://gist.github.com/knedlsepp/3e37f147cb4c94ae6223 | |
| %% affineSpaceIntersection: | |
| %% https://github.com/knedlsepp/affineSpaceIntersection/blob/master/affineSpaceIntersection.m | |
| %% uniquetol: | |
| %% http://www.mathworks.com/matlabcentral/fileexchange/27498-unique-with-tolerance/content/uniquetol.m | |
| %% // Read dataset |
knedlsepp
/ distancePointsAffineSpace.m
Last active
August 29, 2015 14:17
Computing the distance of points and an affine space
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| function d = distancePointsAffineSpace(Points, Space) | |
| lengths = @(X) sqrt(sum(X.^2,2)); | |
| d = lengths(Points - projectPointsOntoAffineSpace(Points, Space)); | |
| end | |
| function [projectedPoints, coordinates] = projectPointsOntoAffineSpace(Points, Space) | |
| %coordinates are with respect to an orthonormal base located in Space(1,:) | |
| dirVecs = bsxfun(@minus, Space(2:end,:), Space(1,:)); | |
| % Orthonormalize the direction vectors; | |
| dirVecs = orth(dirVecs.').'; |
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