gramian

%% Math %%

si = @(x) sin(x) ./ (x + (x==0)); % cardinal sine without pi multiplied argument

hsin = @(x) 0.5 * (1.0 - cos(x)); % haversed sine

hcos = @(x) 0.5 * (1.0 + cos(x)); % haversed cosine

sigm = @(x,k) 0.5 * tanh(0.5 * k * x) + 0.5; % sigmoid function to (exp(-kx)+1)^-1

gramian

function m = antijet(n)
% antijet colormap
% by Christian Himpe 2014
% released under BSD 2-Clause License ( opensource.org/licenses/BSD-2-Clause )

    if(nargin<1 || isempty(n)), n = 256; end;
    L = linspace(0,1,n);

    R = -0.5*sin( L*(1.37*pi)+0.13*pi )+0.5;
    G = -0.4*cos( L*(1.5*pi) )+0.4;

gramian

HISTIGNORE='git *'

alias cd..='cd ..'
alias uncommit='git reset --soft HEAD~'
alias forcepull='git fetch --all && git reset --hard origin/master'
alias oct='octave-cli'
alias mem='/usr/bin/time -f "%M KB"'
alias nano='nano -c -S'
alias ls='ls -la'

gramian

#!/bin/sh

# hack4tex 0.1
# Copyright (c) 2016 Christian Himpe
# released under BSD 2-Clause License ( opensource.org/licenses/BSD-2-Clause )
# based on  Stephan Lehmke's answer to "How do I use TrueType Fonts with PDFTeX 
# using otftotfm?" on tex.stackexchange.com/a/52902
#
# requires otftotfm which is part of lcdf-typetools
#

gramian

function x = ainv(m)
% ainv - approximate inverse
% by Christian Himpe 2016
% released under BSD 2-Clause License ( opensource.org/licenses/BSD-2-Clause )

    d = diag(m);
    d(d~=0) = 1.0./d(d~=0);
    n = numel(d);
    x = bsxfun(@times,m,-d);
    x = bsxfun(@times,x,d');

gramian

\usepackage{adjustbox}  % \ftitle
\usepackage{bbold}      % for \1

% Text

%% Identifiers
\newcommand*{\doi}[1]{DOI \href{http://doi.org/#1}{\texttt{#1}}}                      % doi command
\newcommand*{\isbn}[1]{ISBN \href{http://www.worldcat.org/search?q=#1}{\texttt{#1}}}  % isbn command

%% Colors

gramian

#!/bin/sh

echo $((`cat /sys/class/thermal/thermal_zone0/temp` / 1000))

gramian

#!/bin/sh

for i in *.eps; do
    epspdf ${i} 
done

for i in *.pdf; do
    pdfcrop ${i} ${i}
done

gramian

#!/bin/bash

# project: build_oct
# version: 1.12 (2023-01-01)
# authors: C. Himpe (0000-0003-2194-6754), M. Koehler (0000-0003-2338-9904)
# license: BSD-2-Clause License (opensource.org/licenses/BSD-2-Clause)
# summary: Build Octave and numerical dependencies from source (in Ubuntu 20.04 with GCC >= 10.3).

# requires hardware: either X86-64 with AVX2 or ARM64 with NEON.
# requires software packages: octave libpcre2-dev libreadline-dev libgmp3-dev libmpfr-dev libfreetype6-dev libgl2ps-dev libfontconfig1-dev libglu1-mesa-dev

gramian

function flamegraph(profdata)
### project: flamegraph
### authors: Christian Himpe (0000-0003-2194-6754)
### version: 0.3 (2021-02-06)
### license: BSD-2-Clause (opensource.org/licenses/BSD-2-Clause)
### summary: Flame graph visualization for Octave's profiler output.
#
# USAGE:
#
#  profile on;