尝试运行此代码，逐个移除\pgfplotstablegetelem。您将看到 2 个子浮点将逐步移动到中心。为什么？保留所有浮点，结果如下。我需要以\newcommand这种方式保留 ，但同时使图形居中，我该怎么做？
\documentclass[a4paper,twoside,12pt]{book}
\usepackage[T1]{fontenc}
\usepackage[utf8x]{inputenc}
\usepackage[english]{babel}
\usepackage{tikz}
\usepackage{pgfplotstable, filecontents}
\usepackage{subfig}
\usepackage{float}
\newcommand{\iso}[1]{
\pgfplotstablegetelem{#1}{T}\of{coefficienti.dat}
\pgfmathsetmacro{\T}{\pgfplotsretval}
\pgfplotstablegetelem{#1}{K}\of{coefficienti.dat}
\pgfmathsetmacro{\K}{\pgfplotsretval}
\pgfplotstablegetelem{#1}{Q}\of{coefficienti.dat}
\pgfmathsetmacro{\Q}{\pgfplotsretval}
\pgfplotstablegetelem{#1}{Kf}\of{coefficienti.dat}
\pgfmathsetmacro{\Kf}{\pgfplotsretval}
\pgfplotstablegetelem{#1}{n}\of{coefficienti.dat}
\pgfmathsetmacro{\n}{\pgfplotsretval}
\pgfplotstablegetelem{#1}{Klf}\of{coefficienti.dat}
\pgfmathsetmacro{\Klf}{\pgfplotsretval}
\pgfplotstablegetelem{#1}{Qlf}\of{coefficienti.dat}
\pgfmathsetmacro{\Qlf}{\pgfplotsretval}
\pgfplotstablegetelem{#1}{m}\of{coefficienti.dat}
\pgfmathsetmacro{\m}{\pgfplotsretval}
\begin{tikzpicture}
\begin{axis}[
width=7cm,
domain=0:1,
xlabel=$Equilibrium$,
ylabel=$Sorbed$,
legend style={draw=none, at={(.9,.3)}}]
\end{axis}
\end{tikzpicture}
}
\begin{document}
\begin{filecontents*}{coefficienti.dat}
T K Q Kf n Klf Qlf m
400 0.0463 32.9 5.78 0.321 .0840 40.7 .675
500 0.154 23.8 6.33 0.281 .0722 86.8 .354
600 0.115 24.6 6.30 0.261 .0257 247 .280
700 1.68 24.2 12.1 0.153 .9760 32.0 .376
\end{filecontents*}
\begin{figure}[H]
\centering
\subfloat[]{\iso{0}}
\subfloat[]{\iso{0}}
\caption{This caption is centered, but not the 2 subfloats}
\end{figure}
\end{document}
答案1
您有足够的行尾空格。%请随意将其放在行尾。
\documentclass[a4paper,twoside,12pt]{book}
\usepackage[T1]{fontenc}
\usepackage[utf8x]{inputenc}
\usepackage[english]{babel}
\usepackage{tikz}
\usepackage{pgfplotstable, filecontents}
\usepackage{subfig}
\usepackage{float}
\newcommand{\iso}[1]{%
\pgfplotstablegetelem{#1}{T}\of{coefficienti.dat}%
\pgfmathsetmacro{\T}{\pgfplotsretval}%
\pgfplotstablegetelem{#1}{K}\of{coefficienti.dat}%
\pgfmathsetmacro{\K}{\pgfplotsretval}%
\pgfplotstablegetelem{#1}{Q}\of{coefficienti.dat}%
\pgfmathsetmacro{\Q}{\pgfplotsretval}%
\pgfplotstablegetelem{#1}{Kf}\of{coefficienti.dat}%
\pgfmathsetmacro{\Kf}{\pgfplotsretval}%
\pgfplotstablegetelem{#1}{n}\of{coefficienti.dat}%
\pgfmathsetmacro{\n}{\pgfplotsretval}%
\pgfplotstablegetelem{#1}{Klf}\of{coefficienti.dat}%
\pgfmathsetmacro{\Klf}{\pgfplotsretval}%
\pgfplotstablegetelem{#1}{Qlf}\of{coefficienti.dat}%
\pgfmathsetmacro{\Qlf}{\pgfplotsretval}%
\pgfplotstablegetelem{#1}{m}\of{coefficienti.dat}%
\pgfmathsetmacro{\m}{\pgfplotsretval}%
\begin{tikzpicture}%
\begin{axis}[
width=7cm,
domain=0:1,
xlabel=$Equilibrium$,
ylabel=$Sorbed$,
legend style={draw=none, at={(.9,.3)}}]
\end{axis}%
\end{tikzpicture}%
}
\begin{document}
\begin{filecontents*}{coefficienti.dat}
T K Q Kf n Klf Qlf m
400 0.0463 32.9 5.78 0.321 .0840 40.7 .675
500 0.154 23.8 6.33 0.281 .0722 86.8 .354
600 0.115 24.6 6.30 0.261 .0257 247 .280
700 1.68 24.2 12.1 0.153 .9760 32.0 .376
\end{filecontents*}
\begin{figure}[H]
\centering
\subfloat[]{\iso{0}}
\subfloat[]{\iso{0}}
\caption{This caption is centered, but not the 2 subfloats}
\end{figure}
\end{document}
请注意，width=7cm太多了，无法容纳。请width=0.5\linewidth改用。
