115 lines
3.1 KiB
Plaintext
115 lines
3.1 KiB
Plaintext
|
{
|
||
|
|
"cells": [
|
||
|
|
{
|
||
|
|
"cell_type": "raw",
|
||
|
|
"id": "10c7d783",
|
||
|
|
"metadata": {},
|
||
|
|
"source": [
|
||
|
|
"---\n",
|
||
|
|
"title: Introduction\n",
|
||
|
|
"---"
|
||
|
|
]
|
||
|
|
},
|
||
|
|
{
|
||
|
|
"cell_type": "markdown",
|
||
|
|
"id": "f2e8fc05",
|
||
|
|
"metadata": {},
|
||
|
|
"source": [
|
||
|
|
"## Noch eine Programmiersprache?\n",
|
||
|
|
"\n",
|
||
|
|
"Die Ziele der Schöpfer von Julia kann man in [Why we created Julia](https://julialang.org/blog/2012/02/why-we-created-julia/) nachlesen. Kurzfassung:\n",
|
||
|
|
"\n",
|
||
|
|
"“We want a language that is\n",
|
||
|
|
"\n",
|
||
|
|
"open source\n",
|
||
|
|
"with the speed of C\n",
|
||
|
|
"obvious, familiar mathematical notation like Matlab\n",
|
||
|
|
"as usable for general programming as Python\n",
|
||
|
|
"as easy for statistics as R\n",
|
||
|
|
"as natural for string processing as Perl\n",
|
||
|
|
"as powerful for linear algebra as Matlab\n",
|
||
|
|
"as good at gluing programs together as the shell\n",
|
||
|
|
"dirt simple to learn, yet keeps the most serious hackers happy”\n",
|
||
|
|
"\n",
|
||
|
|
"\n",
|
||
|
|
"\"Wir wollen eine Sprache, die\n",
|
||
|
|
"\n",
|
||
|
|
"- *open source* ist \n",
|
||
|
|
"- die Geschwindigkeit von C hat \n",
|
||
|
|
"- obvious, familiar mathematical notation like Matlab\n",
|
||
|
|
"- as usable for general programming as Python\n",
|
||
|
|
"- as easy for statistics as R\n",
|
||
|
|
"- as natural for string processing as Perl\n",
|
||
|
|
"- as powerful for linear algebra as Matlab\n",
|
||
|
|
"- as good at gluing programs together as the shell\n",
|
||
|
|
"- dirt simple to learn, yet keeps the most serious hackers happy\"\n",
|
||
|
|
"\n",
|
||
|
|
"vs code: erzeuge eine Datei mit der Endung `.jl`, starte ein REPL mit dem Kommando \n",
|
||
|
|
"Alt-Enter am Ende einer Zeile oder Anweisung f\"uhrt dazu, dass die Anweisung \n",
|
||
|
|
"is REPL kopiert und ausgefuehrt wird\n",
|
||
|
|
"\n",
|
||
|
|
"alt-enter execute in julia Repl\n",
|
||
|
|
"shift-enter: ex. and move to next line\n",
|
||
|
|
"\n",
|
||
|
|
"die Erstinstallation von Paketen kann sehr lange dauern. \n",
|
||
|
|
"\n",
|
||
|
|
"im Jupyterhub sind die im Kurs nenötigten Pakete vorinstalliert. \n",
|
||
|
|
"\n",
|
||
|
|
"\n",
|
||
|
|
"\n",
|
||
|
|
"\n",
|
||
|
|
"\n",
|
||
|
|
"\n",
|
||
|
|
"## colored console graphs produced by `Benchmarktools.jl`\n"
|
||
|
|
]
|
||
|
|
},
|
||
|
|
{
|
||
|
|
"cell_type": "code",
|
||
|
|
"execution_count": null,
|
||
|
|
"id": "62fcada8",
|
||
|
|
"metadata": {},
|
||
|
|
"outputs": [],
|
||
|
|
"source": [
|
||
|
|
"using BenchmarkTools\n",
|
||
|
|
"\n",
|
||
|
|
"@benchmark sum(rand(1000))"
|
||
|
|
]
|
||
|
|
},
|
||
|
|
{
|
||
|
|
"cell_type": "markdown",
|
||
|
|
"id": "00dc9599",
|
||
|
|
"metadata": {},
|
||
|
|
"source": [
|
||
|
|
"## structure of floating point numbers\n"
|
||
|
|
]
|
||
|
|
},
|
||
|
|
{
|
||
|
|
"cell_type": "code",
|
||
|
|
"execution_count": null,
|
||
|
|
"id": "ccc6afab",
|
||
|
|
"metadata": {},
|
||
|
|
"outputs": [],
|
||
|
|
"source": [
|
||
|
|
"function printbitsf64(x::Float64)\n",
|
||
|
|
" s = bitstring(x)\n",
|
||
|
|
" printstyled(s[1], color = :blue, reverse=true)\n",
|
||
|
|
" printstyled(s[2:12], color = :green, reverse=true)\n",
|
||
|
|
" printstyled(s[13:end], color=:red, bold=true, reverse=true)\n",
|
||
|
|
" print(\"\\n\")\n",
|
||
|
|
"end\n",
|
||
|
|
"\n",
|
||
|
|
"printbitsf64(27.56640625)"
|
||
|
|
]
|
||
|
|
}
|
||
|
|
],
|
||
|
|
"metadata": {
|
||
|
|
"kernelspec": {
|
||
|
|
"display_name": "Julia 1.8.5",
|
||
|
|
"language": "julia",
|
||
|
|
"name": "julia-1.8"
|
||
|
|
}
|
||
|
|
},
|
||
|
|
"nbformat": 4,
|
||
|
|
"nbformat_minor": 5
|
||
|
|
}
|