嗯，实际上有两个问题我想解决，但我不知道是否应该写两篇文章。无论如何...
我有这个 ANN 的表示，并想包含动作函数，但我也不知道如何让它看起来更好的
\documentclass{article}
\usepackage{tikz}
\begin{document}
\pagestyle{empty}
\def\layersep{1.5cm}
\begin{tikzpicture}[
shorten >=1pt,->,
draw=black!50,
node distance=\layersep,
every pin edge/.style={<-,shorten <=1pt},
neuron/.style={circle,fill=black!25,minimum size=17pt,inner sep=0pt},
input neuron/.style={neuron, fill=green!50},
output neuron/.style={neuron, fill=red!50},
hidden neuron/.style={neuron, fill=blue!50},
annot/.style={text width=4em, text centered}
]
% Draw the input layer nodes
\foreach \name / \y in {1,...,3}
% This is the same as writing \foreach \name / \y in {1/1,2/2,3/3,4/4}
\node[input neuron, pin=left:Input \#\y] (I-\name) at (0,-\y) {};
% set number of hidden layers
\newcommand\Nhidden{2}
% Draw the hidden layer nodes
\foreach \N in {1,...,\Nhidden} {
\foreach \y in {1,...,12} {
\path[yshift=4cm]
node[hidden neuron] (H\N-\y) at (\N*\layersep,-\y cm) {};
}
\node[annot,above of=H\N-1, node distance=1cm] (hl\N) {Hidden layer \N};
}
% Draw the output layer node
\node[output neuron,pin={[pin edge={->}]right:Output}, right of=H\Nhidden-6] (O) {};
% Connect every node in the input layer with every node in the
% hidden layer.
\foreach \source in {1,...,3}
\foreach \dest in {1,...,12}
\path (I-\source) edge (H1-\dest);
% connect all hidden stuff
\foreach [remember=\N as \lastN (initially 1)] \N in {2,...,\Nhidden}
\foreach \source in {1,...,12}
\foreach \dest in {1,...,12}
\path (H\lastN-\source) edge (H\N-\dest);
% Connect every node in the hidden layer with the output layer
\foreach \source in {1,...,12}
\path (H\Nhidden-\source) edge (O);
% Annotate the layers
\node[annot,left of=hl1] {Input layer};
\node[annot,right of=hl\Nhidden] {Output layer};
\end{tikzpicture}
% End of code
\end{document}
提前致谢！
答案1
您可以在节点后的花括号中写入文本（如下所示），但是这会破坏原始图形的间距，并且看起来非常模糊。
\documentclass{standalone}
\usepackage{tikz}
\begin{document}
\pagestyle{empty}
\def\layersep{3cm}
\def\nodeinlayersep{1.5cm}
\begin{tikzpicture}[
shorten >=1pt,->,
draw=black!50,
node distance=\layersep,
every pin edge/.style={<-,shorten <=1pt},
neuron/.style={circle,fill=black!25,minimum size=17pt,inner sep=0pt},
input neuron/.style={neuron, fill=green!50},
output neuron/.style={neuron, fill=red!50},
hidden neuron/.style={neuron, fill=blue!50},
annot/.style={text width=4em, text centered}
]
% Draw the input layer nodes
\foreach \name / \y in {1,...,3}
% This is the same as writing \foreach \name / \y in {1/1,2/2,3/3,4/4}
\node[input neuron, pin=left:Input \#\y] (I-\name) at (0,-\y) {};
% set number of hidden layers
\newcommand\Nhidden{2}
% Draw the hidden layer nodes
\foreach \N in {1,...,\Nhidden} {
\foreach \y in {1,...,12} {
\path[yshift=6cm]
node[hidden neuron] (H\N-\y) at (\N*\layersep,-\y*\nodeinlayersep ) {$\frac{1}{1+e^{-x}}$};
}
\node[annot,above of=H\N-1, node distance=1cm] (hl\N) {Hidden layer \N};
}
% Draw the output layer node
\node[output neuron,pin={[pin edge={->}]right:Output}, right of=H\Nhidden-6] (O) {};
%
% Connect every node in the input layer with every node in the
% hidden layer.
\foreach \source in {1,...,3}
\foreach \dest in {1,...,12}
\path (I-\source) edge (H1-\dest);
% connect all hidden stuff
\foreach [remember=\N as \lastN (initially 1)] \N in {2,...,\Nhidden}
\foreach \source in {1,...,12}
\foreach \dest in {1,...,12}
\path (H\lastN-\source) edge (H\N-\dest);
% Connect every node in the hidden layer with the output layer
\foreach \source in {1,...,12}
\path (H\Nhidden-\source) edge (O);
% Annotate the layers
\node[annot,left of=hl1] {Input layer};
\node[annot,right of=hl\Nhidden] {Output layer};
\end{tikzpicture}
% End of code
\end{document}