\definecolor{ublue}{rgb}{0.152,0.250,0.545} \begin{tikzpicture} \begin{axis}[ width=8cm, height=5cm, xtick={-6,-4,...,6}, ytick={0,0.5,1}, xlabel={\small{$x$}}, ylabel={\small{Softmax($x$)}}, xlabel style={xshift=3.0cm,yshift=1cm}, axis y line=middle, ylabel style={xshift=-2.4cm,yshift=-0.2cm}, x axis line style={->}, axis line style={very thick}, % ymajorgrids, %xmajorgrids, axis x line*=bottom, xmin=-6, xmax=6, ymin=0, ymax=1] \addplot[draw=ublue,very thick]{(tanh(x/2) + 1)/2}; \end{axis} \end{tikzpicture} %---------------------------------------------------------------------