我试图将数字列表作为选项传递给命令。这些数字稍后将用于定义图片内的颜色tikz。我可以做的第一部分，下面是一个例子
\documentclass[border = 5pt]{standalone}
\usepackage{tikz}
% keys
\pgfkeys{
/namespace/.is family,
/namespace,
color fractions/.store in = \colorfractions,
}
% command
\newcommand\colorcommand[1][]{%
\pgfkeys{/namespace, #1}%
%
\begin{tikzpicture}[]
% https://tex.stackexchange.com/questions/45040/pgf-tikz-how-to-store-strings-in-array
\node[draw] at (0, 0){\pgfmathparse{\colorfractions[1]}\pgfmathresult};
\end{tikzpicture}%
}
\begin{document}
\colorcommand[%
color fractions = {{{0.1,0.2,0.3}}},
]
\end{document}
第二部分给我带来了问题。例如，我可以使用这回答定义颜色，
(...)
\begin{tikzpicture}[]
% https://tex.stackexchange.com/questions/19190/how-to-define-a-random-number-with-xcolor-and-tikz-pgf
\xdefinecolor{localcolor}{rgb}{\pgfmathparse{\colorfractions[1]}\pgfmathresult, 1.0, 1.0}
% https://tex.stackexchange.com/questions/45040/pgf-tikz-how-to-store-strings-in-array
\node[draw, fill = localcolor] at (0, 0){\pgfmathparse{\colorfractions[1]}\pgfmathresult};
\end{tikzpicture}%
(...)
但失败了！有什么建议吗？谢谢
答案1
您不能像这样扩展颜色，但以下方法有效：
\documentclass[border = 5pt]{standalone}
\usepackage{tikz}
% keys
\pgfkeys{
/namespace/.is family,
/namespace,
color fractions/.store in = \colorfractions,
}
% command
\newcommand\colorcommand[1][]{%
\pgfkeys{/namespace, #1}%
%
\begin{tikzpicture}[]
\pgfmathsetmacro{\myfraction}{\colorfractions[1]}
\xdefinecolor{localcolor}{rgb}{\myfraction, 1.0, 1.0}
% https://tex.stackexchange.com/questions/45040/pgf-tikz-how-to-store-strings-in-array
\node[draw,fill=localcolor] at (0, 0){\pgfmathparse{\colorfractions[1]}\pgfmathresult};
\end{tikzpicture}%
}
\begin{document}
\colorcommand[%
color fractions = {{{0.1,0.2,0.3}}},
]
\end{document}
它也适用于\definecolor{localcolor}{rgb}{\myfraction, 1.0, 1.0}代替\xdefinecolor和
\pgfmathparse{\colorfractions[1]}
\definecolor{localcolor}{rgb}{\pgfmathresult, 1.0, 1.0}
或者
\pgfmathparse{\colorfractions[1]}
\xdefinecolor{localcolor}{rgb}{\pgfmathresult, 1.0, 1.0}