3

This question already has an answer here:

\documentclass[tikz]{standalone}

\begin{document}

\begin{tikzpicture}
  \draw [-] (0, 0) edge node[above] {$\epsilon_f$} (5, 0);
  \draw [<->] (1, -1) edge node[below] {$\epsilon_f$} (4, -1);
\end{tikzpicture}

\end{document}

The result is :

result

Why does the left-end has strange arrowhead? How can I make it a normal <- arrowhead?

marked as duplicate by marmot, CarLaTeX, Mensch, Stefan Pinnow, Phelype Oleinik Jan 21 at 19:50

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.

  • 3
    Those are actually two arrowheads pointing to the same spot, though I wouldn't know why the other one is drawn. Note that this also won't happen if you use to or -- instead of edge. – Circumscribe Jan 21 at 16:34
4
\documentclass[tikz]{standalone}

\begin{document}

\begin{tikzpicture}
  \draw [-] (0, 0) edge node[above] {$\epsilon_f$} (5, 0);
  \draw  (1, -1) edge[<->] node[below] {$\epsilon_f$} (4, -1);
\end{tikzpicture}

\end{document}

enter image description here

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