New Post

content/blog/codeoutputlatex.md

@@ -0,0 +1,149 @@
+---
+title: "Code alongside Output in LaTex"
+date: 2022-01-27T09:15:10-05:00
+draft: false
+tags: ["LaTex"]
+math: false
+---
+
+Working on a tool paper, I had the desire to share code alongside its output. With a combination of the `listings`, `caption`, and `color` packages, we can get a result that's nice looking.
+
+The imports needed
+
+```latex
+\usepackage{color}
+\usepackage{listings}
+\usepackage{caption}
+```
+
+I want a think topbar that labels which column is the code section and which column is the output section.
+
+```latex
+\DeclareCaptionFormat{listing}
+    {\colorbox[cmyk]{0.73, 0.35, 0.15,.5}
+    {\parbox{\textwidth}{#1#2#3}}}
+\DeclareCaptionFont{white}{\color{white}}
+\captionsetup[lstlisting]{
+    format=listing,
+    labelfont=white,
+    textfont=white,
+    font={bf,footnotesize}
+}
+```
+
+Next I define some colors that I would like to use as the theme for the code output:
+
+```latex
+\definecolor{keyblue}{rgb}{0.1, 0.1, 0.6}
+\definecolor{dkgreen}{rgb}{0,0.6,0}
+\definecolor{gray}{rgb}{0.5,0.5,0.5}
+\definecolor{stringcol}{rgb}{0.58,0.4,0.1}
+```
+
+Setup for the code output
+
+```latex
+\lstset{
+  language=Python,
+  columns=flexible,
+  basicstyle={\small\ttfamily},
+  keywordstyle=\color{keyblue},
+  commentstyle=\color{dkgreen},
+  stringstyle=\color{stringcol},
+  breaklines=true,
+  breakatwhitespace=true,
+  tabsize=4
+}
+```
+
+Then inside the document, you can use `minipage` to setup a two column layout.
+
+```latex
+% Column 1: Code
+\begin{minipage}[t]{.45\textwidth}
+\begin{lstlisting}[title=Code]
+def factorial(n):
+    if n == 0:
+        return 1
+    return n * factorial(n - 1)
+# Let's test it out!
+print(factorial(5))
+\end{lstlisting}
+\end{minipage}
+% Column 2: Output
+\begin{minipage}[t]{.45\textwidth}
+\begin{lstlisting}[title=Output]
+    120
+\end{lstlisting}
+\end{minipage}
+```
+
+ ![](/files/images/202201292013.svg)
+
+Below is all these steps combined into a compile-able LaTex file.
+
+
+```latex
+\documentclass{article}
+\usepackage[utf8]{inputenc}
+
+% Imports
+\usepackage{color}
+\usepackage{listings}
+\usepackage{caption}
+
+% Define colors
+\definecolor{keyblue}{rgb}{0.1, 0.1, 0.6}
+\definecolor{dkgreen}{rgb}{0,0.6,0}
+\definecolor{gray}{rgb}{0.5,0.5,0.5}
+\definecolor{stringcol}{rgb}{0.58,0.4,0.1}
+
+% Caption Setup
+\DeclareCaptionFormat{listing}
+    {\colorbox[cmyk]{0.73, 0.35, 0.15,.5}
+    {\parbox{\textwidth}{#1#2#3}}}
+\DeclareCaptionFont{white}{\color{white}}
+\captionsetup[lstlisting]{
+    format=listing,
+    labelfont=white,
+    textfont=white,
+    font={bf,footnotesize}
+}
+
+% Code listing setup
+\lstset{
+  language=Python,
+  columns=flexible,
+  basicstyle={\small\ttfamily},
+  keywordstyle=\color{keyblue},
+  commentstyle=\color{dkgreen},
+  stringstyle=\color{stringcol},
+  breaklines=true,
+  breakatwhitespace=true,
+  tabsize=4
+}
+
+
+\begin{document}
+
+% Column 1: Code
+\begin{minipage}[t]{.45\textwidth}
+\begin{lstlisting}[title=Code]
+def factorial(n):
+    if n == 0:
+        return 1
+    return n * factorial(n - 1)
+# Let's test it out!
+print(factorial(5))
+\end{lstlisting}
+\end{minipage}
+% Column 2: Output
+\begin{minipage}[t]{.45\textwidth}
+\begin{lstlisting}[title=Output]
+    120
+\end{lstlisting}
+\end{minipage}
+
+\end{document}
+
+```