Update on Overleaf.

appendix.tex

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+\documentclass[floatsintext, man, draftfirst]{apa7}\usepackage[]{graphicx}\usepackage[]{xcolor}
+% maxwidth is the original width if it is less than linewidth
+% otherwise use linewidth (to make sure the graphics do not exceed the margin)
+\makeatletter
+\def\maxwidth{ %
+  \ifdim\Gin@nat@width>\linewidth
+    \linewidth
+  \else
+    \Gin@nat@width
+  \fi
+}
+\makeatother
+
+\definecolor{fgcolor}{rgb}{0.345, 0.345, 0.345}
+\newcommand{\hlnum}[1]{\textcolor[rgb]{0.686,0.059,0.569}{#1}}%
+\newcommand{\hlstr}[1]{\textcolor[rgb]{0.192,0.494,0.8}{#1}}%
+\newcommand{\hlcom}[1]{\textcolor[rgb]{0.678,0.584,0.686}{\textit{#1}}}%
+\newcommand{\hlopt}[1]{\textcolor[rgb]{0,0,0}{#1}}%
+\newcommand{\hlstd}[1]{\textcolor[rgb]{0.345,0.345,0.345}{#1}}%
+\newcommand{\hlkwa}[1]{\textcolor[rgb]{0.161,0.373,0.58}{\textbf{#1}}}%
+\newcommand{\hlkwb}[1]{\textcolor[rgb]{0.69,0.353,0.396}{#1}}%
+\newcommand{\hlkwc}[1]{\textcolor[rgb]{0.333,0.667,0.333}{#1}}%
+\newcommand{\hlkwd}[1]{\textcolor[rgb]{0.737,0.353,0.396}{\textbf{#1}}}%
+\let\hlipl\hlkwb
+
+\usepackage{framed}
+\makeatletter
+\newenvironment{kframe}{%
+ \def\at@end@of@kframe{}%
+ \ifinner\ifhmode%
+  \def\at@end@of@kframe{\end{minipage}}%
+  \begin{minipage}{\columnwidth}%
+ \fi\fi%
+ \def\FrameCommand##1{\hskip\@totalleftmargin \hskip-\fboxsep
+ \colorbox{shadecolor}{##1}\hskip-\fboxsep
+     % There is no \\@totalrightmargin, so:
+     \hskip-\linewidth \hskip-\@totalleftmargin \hskip\columnwidth}%
+ \MakeFramed {\advance\hsize-\width
+   \@totalleftmargin\z@ \linewidth\hsize
+   \@setminipage}}%
+ {\par\unskip\endMakeFramed%
+ \at@end@of@kframe}
+\makeatother
+
+\definecolor{shadecolor}{rgb}{.97, .97, .97}
+\definecolor{messagecolor}{rgb}{0, 0, 0}
+\definecolor{warningcolor}{rgb}{1, 0, 1}
+\definecolor{errorcolor}{rgb}{1, 0, 0}
+\newenvironment{knitrout}{}{} % an empty environment to be redefined in TeX
+
+\usepackage{alltt}
+
+
+% maxwidth is the original width if it is less than linewidth
+% otherwise use linewidth (to make sure the graphics do not exceed the margin)
+\makeatletter
+\def\maxwidth{ %
+  \ifdim\Gin@nat@width>\linewidth
+    \linewidth
+  \else
+    \Gin@nat@width
+  \fi
+}
+
+\usepackage{alltt}
+
+
+\usepackage{epstopdf}% To incorporate .eps illustrations using PDFLaTeX, etc.
+\usepackage{subcaption}% Support for small, `sub' figures and tables
+\usepackage{tikz}
+\usetikzlibrary{positioning, shapes, arrows, shadows}
+
+\def \parrotpdf {\includegraphics[]{parrot.pdf}}
+\DeclareUnicodeCharacter{1F99C}{\parrotpdf}
+\usepackage{tabularx}
+\usepackage[utf8]{inputenc}
+\usepackage{wrapfig}
+\usepackage[T1]{fontenc}
+\usepackage{textcomp}
+% \usepackage[garamond]{mathdesign}
+
+% \usepackage[letterpaper,left=1in,right=1in,top=1in,bottom=1in]{geometry}
+
+% packages i use in essentially every document
+\usepackage{graphicx}
+\usepackage{enumerate}
+
+% packages i use in many documents but leave off by default
+\usepackage{amsmath}%}, amsthm, amssymb}
+\DeclareMathOperator*{\argmin}{arg\,min} % thin space, limits underneath in displays
+\DeclareMathOperator*{\argmax}{arg\,max} % thin space, limits underneath in displays
+
+
+\usepackage{subcaption}
+% import and customize urls
+% \usepackage[usenames,dvipsnames]{color}
+% \usepackage[breaklinks]{hyperref}
+
+\hypersetup{colorlinks=true, linkcolor=black, citecolor=black, filecolor=blue,
+     urlcolor=blue, unicode=true}
+
+% add bibliographic stuff 
+\usepackage[american]{babel}
+\usepackage{csquotes}
+\usepackage[natbib=true, style=apa, sortcites=true, backend=biber]{biblatex}
+\addbibresource{Bibliography.bib}
+\DeclareLanguageMapping{american}{american-apa}
+
+\defbibheading{secbib}[\bibname]{%
+  \section*{#1}%
+  \markboth{#1}{#1}%
+  \baselineskip 14.2pt%
+  \prebibhook}
+
+\def\citepos#1{\citeauthor{#1}'s (\citeyear{#1})}
+\def\citespos#1{\citeauthor{#1}' (\citeyear{#1})}
+\newcommand\TODO[1]{\textsc{\color{red} #1}}
+
+% I've gotten advice to make this as general as possible to attract the widest possible audience.
+\title{Appendices for: What to do about prediction errors in automated content analysis}
+
+\shorttitle{Appendices: Prediction errors in automated content analysis}
+
+\authorsnames[1,2,3]{Nathan TeBlunthuis, Valerie Hase, Chung-hong Chan}
+\authorsaffiliations{{Northwestern University}, {LMU Munich}, {GESIS - Leibniz-Institut für Sozialwissenschaften}}
+\leftheader{TeBlunthuis, Hase \& Chan}
+
+\keywords{
+Content Analysis; Machine Learning; Classification Error; Attenuation Bias; Simulation; Computational Methods; Big Data; AI;
+}
+
+\IfFileExists{upquote.sty}{\usepackage{upquote}}{}
+
+\abstract{}
+\IfFileExists{upquote.sty}{\usepackage{upquote}}{}
+\begin{document}
+\maketitle
+\section{Additional plots from Simulations 1 and 2}
+\label{appendix:main.sim.plots}
+\begin{figure}
+\begin{knitrout}
+\definecolor{shadecolor}{rgb}{0.969, 0.969, 0.969}\color{fgcolor}
+\includegraphics[width=\maxwidth]{figure/example1_g-1} 
+\end{knitrout}
+\caption{Estimates of $B_z$ in multivariate regression with $X$ measured using machine learning and model accuracy independent of $X$, $Y$, and $Z$. All methods obtain precise and accurate estimates given sufficient validation data.}
+\end{figure}
+
+
+\end{document}