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diff --git a/tex/src/delete-me-image-histogram.tex b/tex/src/delete-me-image-histogram.tex
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+%% Plot the demonstration image and its histogram.
+%
+%% Copyright (C) 2019-2020 Mohammad Akhlaghi <mohammad@akhlaghi.org>
+%
+%% This file is free software: you can redistribute it and/or modify it
+%% under the terms of the GNU General Public License as published by the
+%% Free Software Foundation, either version 3 of the License, or (at your
+%% option) any later version.
+%
+%% This file is distributed in the hope that it will be useful, but WITHOUT
+%% ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+%% FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+%% for more details.
+%
+%% You should have received a copy of the GNU General Public License along
+%% with this file.  If not, see <http://www.gnu.org/licenses/>.
+
+\begin{tikzpicture}
+
+  %% The displayed WFPC2 image.
+  \node[anchor=south west] (img) at (0,0)
+       {\includegraphics[width=0.5\linewidth]
+         {tex/build/image-histogram/wfpc2.pdf}};
+
+  %% Its label
+  \node[anchor=south west] at (0.45\linewidth,0.45\linewidth)
+       {\textcolor{white}{a}};
+
+  %% This histogram.
+  \begin{axis}[at={(0.52\linewidth,0.1\linewidth)},
+      no markers,
+      axis on top,
+      xmode=normal,
+      ymode=normal,
+      yticklabels={},
+      scale only axis,
+      xlabel=Pixel value,
+      width=0.5\linewidth,
+      height=0.412\linewidth,
+      enlarge y limits=false,
+      enlarge x limits=false,
+      ]
+    \addplot [const plot mark mid, fill=red]
+    table [x index=0, y index=1]
+    {tex/build/to-publish/wfpc2-histogram.txt}
+    \closedcycle;
+  \end{axis}
+
+  %% The histogram's label
+  \node[anchor=south west] at (0.95\linewidth,0.45\linewidth) {b};
+\end{tikzpicture}