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LaTeX foreach 具有非数字索引

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LaTeX foreach 具有非数字索引

我正在编写一个简单的脚本来制作随机卡片，用于在课堂上教授统计思想。我使用 Tikz 制作了随机卡片，这些卡片都遵循我想要的布局，使用嵌套的 foreach 循环。然而，我看到了一个我无法追踪的奇怪现象。

\documentclass{article}
\usepackage[utf8]{inputenc}
\usepackage[letterpaper,left=0mm,right=0mm,top=0mm,bottom=0mm]{geometry}
\usepackage{graphicx,tikz,pgfmath}


\begin{document}

%Define a vector of dog breeds: breed,breed image,lower random effect level, upper random effect level, and effect level offset
\newcommand{\dogBreeds}{Akita/Akita.png/0/5/5,Beagle/Beagle.png/6/12/0,Collie/Collie.png/28/40/0,Dalmatian/Dalmatian.png/30/45/75}%\newcommand{\dogBreeds}

%Define vectors of values for the (x,y) center of each card
\newcommand{\xCardColumnCenters}{2.5,6}
\newcommand{\yCardRowCenters}{1.5,3.5,5.5,7.5,9.5}

%Define vectors of x values for the Edge of each card
\newcommand{\xCardLeftEdge}{0.75,4.25}
\newcommand{\xCardRightEdge}{4.25,8}

%Define vectors of y values for the Edge of each card
\newcommand{\yCardLowerEdge}{0.5,2.5,4.5,6.5,8.5}
\newcommand{\yCardUpperEdge}{2.5,4.5,6.5,8.5,10.5}

%iterate through the dog breeds
\foreach \breed / \image / \lower / \upper / \offset in \dogBreeds{
   \begin{tikzpicture}[remember picture,overlay]
    %remember picture, overlay allow us to use absolute measurements on the page, ignoring any margins
        %iterate through the y and x columns to build a matrix of cards
        \foreach \y in \yCardRowCenters {
            \foreach \x in \xCardColumnCenters  {
                %center and scale the image using (x,y) relative to the page in absolute coordinates
                \node[xshift=\x in,yshift=\y in,anchor=center](image) at (current page.south west) {\includegraphics[height=1.5 in]{\image}};
           }%\foreach \x in \xCardColumnCenters
        }%\foreach \y in \yCardRowCenters

        \foreach \x in \xCardRightEdge  {

           \foreach \y in \yCardRowCenters {
               \node[fill=white,xshift=\x in,yshift=\y in,rotate=90,anchor=south] at (current page.south west) {\huge{\textbf{BREED}}};
           }%\foreach \y in \yCardRowCenters

        }%\foreach \x in \xCardRightEdge  {

        \foreach \x in \xCardLeftEdge  {

           \foreach \y in \yCardUpperEdge {
               \node[fill=white,xshift=\x in,yshift=\y in,anchor=north west] at (current page.south west) {\Large{\breed}};
           }%\foreach \y in \yCardRowCenters        

            \foreach \y in \yCardLowerEdge {
                %create a random effect size
                \pgfmathsetmacro{\effect}{random(\lower,\upper)-\offset};
               \node[fill=white,xshift=\x in,yshift=\y in,anchor=south west] at (current page.south west) {\Large{Effect: $\effect$}};
           }%\foreach \y in \yCardLowerEdge

        }%\foreach \y in \yCardRowCenters
    \end{tikzpicture}
   \clearpage
}%\foreach \breed in \dogBreeds

\end{document}

这会产生所需的输出，但有一个例外。在每个新页面的顶部，它会在每页顶部放置一个数字（\dogBreeds 命令中的第一个数字）。我不确定是什么原因造成的；我尝试在每组条目的开头创建一个数字索引，但这并没有消除这种影响。很奇怪。有什么想法吗？

答案1

将变量名改为 以外的名称\lower。事实上，始终使用\my<macro>name 来确保不会与 TeX 原语发生冲突。

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