我正尝试在图表中绘制一些点。
这个想法是，拥有 A 和 B 类劳动力的三个不同的工人可以选择从事或不从事某项职业。八种分配是这些工人可以选择从事或不从事该职业的八种不同方式。
代码如下：
\begin{tikzpicture}[scale=1,thick]
\def\LA{1} % Total amount of A labour
\def\LB{1} % Total amount of B labour
% three workers with different amounts of A and B labour
\def\oneA{0.3}
\def\twoA{0.5}
\def\threeA{\LA-\oneA-\twoA}
\def\oneB{0.6}
\def\twoB{0.1}
\def\threeB{\LB-\oneB-\twoB}
% eight allocations:
\def\aA{0} % no workers in the occupation
\def\aB{0}
\def\bA{\oneA} % worker one in the occupation
\def\bB{\oneB}
\def\cA{\twoA} % worker two in the occupation
\def\cB{\twoB}
\def\dA{\threeA} % worker three in the occupation
\def\dB{\threeB}
\def\eA{\oneA + \twoA} % workers one + two in the occupation
\def\eB{\oneB + \twoB}
\def\fA{\oneA + \threeA} % workers one + three in the occupation
\def\fB{\oneB + \threeB}
\def\gA{\twoA + \threeA} % workers two+ three in the occupation
\def\gB{\twoA + \threeA}
\def\hA{\LA} % all workers in the occupation
\def\hB{\LB}
\begin{axis}[
restrict y to domain=0:\LB,
%samples = 100,
xmin = 0, xmax = \LA,
ymin = 0, ymax = \LB,
xlabel = $L_1^A$,
ylabel = $L_1^B$,
axis y line = left,
axis x line = bottom,
y axis line style = {-},
x axis line style = {-}
]
\addplot+[nodes near coords,only marks, point meta=explicit symbolic]
table[meta=label] {
x y label
{\aA} {\aB} a
{\bA} {\bB} b
{\cA} {\cB} c
{\dA} {\dB} d
{\eA} {\eB} e
{\fA} {\fB} f
{\gA} {\gB} g
{\hA} {\hB} h
};
\end{axis}
\end{tikzpicture}
我收到以下错误信息：
! Package PGF Math Error: Could not parse input '1-0.6-0.1' as a floating point
number, sorry. The unreadable part was near '-0.6-0.1'..
如果我注释掉一些行，我会发现前三个分配有效（即 a、b 和 c 有效），但是当我尝试第四个分配（d）时，它无法处理我在 \threeA 中定义的差异 1-0.6-0.1。
我十分感激任何帮助！
谢谢！
苏菲亚
答案1
试试这个（我没有测试这个，因为我目前无法访问我的电脑并且我没有可编译的 MWE）
\begin{tikzpicture}[scale=1,thick]
\pgfmathsetmacro\LA{1} % Total amount of A labour
\pgfmathsetmacro\LB{1} % Total amount of B labour
% three workers with different amounts of A and B labour
\pgfmathsetmacro\oneA{0.3}
\pgfmathsetmacro\twoA{0.5}
\pgfmathsetmacro\threeA{\LA-\oneA-\twoA}
\pgfmathsetmacro\oneB{0.6}
\pgfmathsetmacro\twoB{0.1}
\pgfmathsetmacro\threeB{\LB-\oneB-\twoB}
% eight allocations:
\pgfmathsetmacro\aA{0} % no workers in the occupation
\pgfmathsetmacro\aB{0}
\pgfmathsetmacro\bA{\oneA} % worker one in the occupation
\pgfmathsetmacro\bB{\oneB}
\pgfmathsetmacro\cA{\twoA} % worker two in the occupation
\pgfmathsetmacro\cB{\twoB}
\pgfmathsetmacro\dA{\threeA} % worker three in the occupation
\pgfmathsetmacro\dB{\threeB}
\pgfmathsetmacro\eA{\oneA + \twoA} % workers one + two in the occupation
\pgfmathsetmacro\eB{\oneB + \twoB}
\pgfmathsetmacro\fA{\oneA + \threeA} % workers one + three in the occupation
\pgfmathsetmacro\fB{\oneB + \threeB}
\pgfmathsetmacro\gA{\twoA + \threeA} % workers two+ three in the occupation
\pgfmathsetmacro\gB{\twoA + \threeA}
\pgfmathsetmacro\hA{\LA} % all workers in the occupation
\pgfmathsetmacro\hB{\LB}
\begin{axis}[
restrict y to domain=0:\LB,
%samples = 100,
xmin = 0, xmax = \LA,
ymin = 0, ymax = \LB,
xlabel = $L_1^A$,
ylabel = $L_1^B$,
axis y line = left,
axis x line = bottom,
y axis line style = {-},
x axis line style = {-}
]
\addplot+[nodes near coords,only marks, point meta=explicit symbolic]
table[meta=label] {
x y label
{\aA} {\aB} a
{\bA} {\bB} b
{\cA} {\cB} c
{\dA} {\dB} d
{\eA} {\eB} e
{\fA} {\fB} f
{\gA} {\gB} g
{\hA} {\hB} h
};
\end{axis}
\end{tikzpicture}
您不能简单地使用 进行数学运算\def。在上面的代码中，我使用了 中的计算命令pgfmath。