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

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

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

%% 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