This discussion focuses on labeling the y-axis with π and -π using TikZ in LaTeX. A user sought assistance on how to implement these labels, and another participant provided a solution involving the use of a foreach loop to create ticks and labels at the coordinates (0, π) and (0, -π). The final code snippet shared successfully demonstrates how to achieve this labeling in a TikZ picture environment.
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\begin{tikzpicture}
\draw[->] (0,0) -- (3.5,0) coordinate (x axis);
\draw[->] (0,-3.5) -- (0,3.5) coordinate (y axis);
\end{tikzpicture}Do you mean to draw ticks and labels at (0, $\pi$) and (0, $-\pi$)? You could do the following.dwsmith said:I am trying to label the y-axis with pi and -pi. How can I do that?
\def\npi{3.1416}
\begin{tikzpicture}
\draw[->] (0,0) -- (3.5,0) node[below] {$x$};
\draw[->] (0,-3.5) -- (0,3.5) node[left] {$y$};
\draw (2pt,\npi) -- (-2pt,\npi) node {$\pi$};
\draw (2pt,-\npi) -- (-2pt,-\npi) node {$-\pi$};
\end{tikzpicture}dwsmith said:I am trying to label the y-axis with pi and -pi. How can I do that?
Code:\begin{tikzpicture} \draw[->] (0,0) -- (3.5,0) coordinate (x axis); \draw[->] (0,-3.5) -- (0,3.5) coordinate (y axis); \end{tikzpicture}
\begin{tikzpicture}
%ticks
\foreach \y/\ytext in {-3.14/-\pi,3.14/\pi}
\draw (1pt,\y) -- (-3pt,\y)
node[anchor=east] {$\ytext$};
%
\draw[->] (0,0) -- (3.5,0) coordinate (x axis);
\draw[->] (0,-3.5) -- (0,3.5) coordinate (y axis);
\end{tikzpicture}