% This file is embedded in datatool-user.pdf version 3.4.1 2025-04-25
% Example 129 Multi Bar Chart (Action `multibar chart')
% Label: "ex:barchartmarksaction"
% arara: pdflatex
% arara: pdfcrop
\documentclass[12pt]{article}
\pagestyle{empty}
% sample CSV file:
\begin{filecontents}[noheader,overwrite]{studentmarks.csv}
Surname,Forename,StudentNo,Assign1,Assign2,Assign3
"Smith, Jr",John,102689,68,57,72
"Brown",Jane,102647,75,84,80
"Brown",Jane,102646,64,92,79
"Brown",Andy,103569,42,52,54
"Adams",Zoë,105987,52,48,57
"Brady",Roger,106872,68,60,62
"Verdon",Clare,104356,45,50,48
\end{filecontents}


\usepackage{databar}
% Load data from studentmarks.csv file:
\DTLsetup{store-datum,default-name=marks}
\DTLread{studentmarks.csv} 
\begin{document}
\DTLaction
[
 % either:
 keys={Assign1,Assign2,Assign3}, % or:
 %  columns={4-},
 options={
  barwidth=10pt
 }
]
{multibar chart} 
\end{document}
