2

We assume that to have drawn a vector....

\documentclass[a4paper,12pt]{article}
\usepackage{tikz}
\begin{document}
\tikz\draw[->,line width=1pt] (0,0) -- (1,1);
\end{document}

enter image description here

Is there a pencil effect with TikZ as the picture below?

enter image description here

17