\begin{tikzpicture} \begin{axis}[ axis x line=middle, axis y line=left, enlarge y limits=true, xmode=log, % Logarithmic x axis xmin=0.01, xmax=1, % Positive domain... xticklabel=\pgfmathparse{exp(\tick)}\pgfmathprintnumber{\pgfmathresult}, xticklabel style={/pgf/number format/.cd,fixed}, % Use fixed point notation width=8cm, height=6cm, % size of the image grid = major, grid style={dashed, gray!30}, ymin=-1, % start the diagram at this y-coordinate ymax= 1, % end the diagram at this y-coordinate axis background/.style={fill=white}, ylabel=$Y$, xlabel=$X$, legend style={at={(0.9,0.95)}, anchor=north} ] \addplot[domain=0.0105:1, red, thick,samples=2000] {-sin(deg(1/(x)))}; \addplot[domain=0.0105:0.011, blue, thick,samples=20] {10}; \addlegendentry{$\{(x, \sin(\frac{1}{x})) \in X \times Y\}$} \addlegendentry{$(-1,1) \subseteq Y$} \end{axis} \draw[ultra thick,blue] (0,0.5) -- (0,4); \end{tikzpicture}