
Gostaria de plotar funções de ativação em meu documento, usando subfigure
para controlar a aparência (duas colunas em uma página).
Adicionei uma legenda à trama, mas essa lenda cobre parte da trama. Eu gostaria de mudar sua posição para o canto superior esquerdo.
Este é um MWE disso.
\documentclass[11pt]{article}
\usepackage{subfigure}
\usepackage{pgfplots}
\usepackage[top=3cm,left=3cm,right=3cm,bottom=3cm]{geometry}
% Scriptsize axis style.
\pgfplotsset{every axis/.append style={tick label style={/pgf/number format/fixed},font=\scriptsize,ylabel near ticks,xlabel near ticks,grid=major}}
\pgfplotsset{compat=1.16}
\begin{document}
\begin{figure}[t!]
\centering
\subfigure[Logistic sigmoid activation function.]{
\begin{tikzpicture}[declare function={sigma(\x)=1/(1+exp(-\x));
sigmap(\x)=sigma(\x)*(1-sigma(\x));}]
\begin{axis}[width=5.5cm,height=4cm,ylabel=$\sigma(z)$,xlabel=$z$,ymin=0,ymax=1.25,xmin=-5,xmax=5]
\addplot[blue,smooth] {1/(1+exp(-x))};
\addplot[red,dotted,mark=none] (x,{sigmap(x)});
\legend{$\sigma(x)$,$\sigma'(x)$}
%\addlegendentry{Logistic sigmoid}
\end{axis}
\end{tikzpicture}
}
\subfigure[Hyperbolic tangent activation function.]{
\begin{tikzpicture}
\begin{axis}[width=5.5cm,height=4cm,ylabel=$\tanh(z)$,xlabel=$z$,ymin=-1.25,ymax=1.25,xmin=-5,xmax=5]
\addplot[blue,smooth] {tanh(x)};
%\addlegendentry{Hyperbolic tangent}
\end{axis}
\end{tikzpicture}
}
\caption[Sigmoidal activation functions.]{Describe all functions here.}
\label{fig:sigmoid-tanh}
\end{figure}
\end{document}
Responder1
O estilo da legenda pode ser controlado com a legend style
tecla. Por exemplo, usando
legend style={at={(0.05,0.95)},anchor=north west}
coloca-o no canto superior esquerdo.
\documentclass[11pt]{article}
\usepackage{subfigure}
\usepackage{pgfplots}
\usepackage[top=3cm,left=3cm,right=3cm,bottom=3cm]{geometry}
% Scriptsize axis style.
\pgfplotsset{every axis/.append style={tick label style={/pgf/number format/fixed},font=\scriptsize,ylabel near ticks,xlabel near ticks,grid=major}}
\pgfplotsset{compat=1.16}
\begin{document}
\begin{figure}[t!]
\centering
\subfigure[Logistic sigmoid activation function.]{
\begin{tikzpicture}[declare function={sigma(\x)=1/(1+exp(-\x));
sigmap(\x)=sigma(\x)*(1-sigma(\x));}]
\begin{axis}[width=5.5cm,height=4cm,ylabel=$\sigma(z)$,xlabel=$z$,ymin=0,ymax=1.25,
xmin=-5,xmax=5,legend style={at={(0.05,0.95)},anchor=north west}]
\addplot[blue,smooth] {1/(1+exp(-x))};
\addplot[red,dotted,mark=none] (x,{sigmap(x)});
\legend{$\sigma(x)$,$\sigma'(x)$}
%\addlegendentry{Logistic sigmoid}
\end{axis}
\end{tikzpicture}
}
\subfigure[Hyperbolic tangent activation function.]{
\begin{tikzpicture}
\begin{axis}[width=5.5cm,height=4cm,ylabel=$\tanh(z)$,xlabel=$z$,
ymin=-1.25,ymax=1.25,xmin=-5,xmax=5]
\addplot[blue,smooth] {tanh(x)};
%\addlegendentry{Hyperbolic tangent}
\end{axis}
\end{tikzpicture}
}
\caption[Sigmoidal activation functions.]{Describe all functions here.}
\label{fig:sigmoid-tanh}
\end{figure}
\end{document}
BTW, subfigure
está obsoleto, você pode querer usar o subcaption
pacote.
\documentclass[11pt]{article}
\usepackage{subcaption}
\usepackage{pgfplots}
\usepackage[top=3cm,left=3cm,right=3cm,bottom=3cm]{geometry}
% Scriptsize axis style.
\pgfplotsset{every axis/.append style={tick label style={/pgf/number format/fixed},font=\scriptsize,ylabel near ticks,xlabel near ticks,grid=major}}
\pgfplotsset{compat=1.16}
\begin{document}
\begin{figure}[t!]
\centering
\begin{subfigure}[b]{0.45\textwidth}
\centering
\begin{tikzpicture}[declare function={sigma(\x)=1/(1+exp(-\x));
sigmap(\x)=sigma(\x)*(1-sigma(\x));}]
\begin{axis}[width=5.5cm,height=4cm,ylabel=$\sigma(z)$,xlabel=$z$,ymin=0,ymax=1.25,
xmin=-5,xmax=5,legend style={at={(0.05,0.95)},anchor=north west}]
\addplot[blue,smooth] {1/(1+exp(-x))};
\addplot[red,dotted,mark=none] (x,{sigmap(x)});
\legend{$\sigma(x)$,$\sigma'(x)$}
%\addlegendentry{Logistic sigmoid}
\end{axis}
\end{tikzpicture}
\caption{Logistic sigmoid activation function.}
\end{subfigure}
\quad
\begin{subfigure}[b]{0.45\textwidth}
\centering
\begin{tikzpicture}
\begin{axis}[width=5.5cm,height=4cm,ylabel=$\tanh(z)$,xlabel=$z$,
ymin=-1.25,ymax=1.25,xmin=-5,xmax=5]
\addplot[blue,smooth] {tanh(x)};
%\addlegendentry{Hyperbolic tangent}
\end{axis}
\end{tikzpicture}
\caption{Hyperbolic tangent activation function.}
\end{subfigure}
\caption[Sigmoidal activation functions.]{Describe all functions here.}
\label{fig:sigmoid-tanh}
\end{figure}
\end{document}