\pgfmathaccuma我无法将和最初赋值为零\pgfmathaccumb。它给出以下错误：
! Missing number, treated as zero.
然后我按s跳过。但是，\pgfmathaccumb始终是空的！我想将其初始值设置为零。
这是我的 MWE：
\documentclass{article}
\usepackage{pgfplotstable}
\usepackage{filecontents}
\begin{filecontents}{data.txt}
index mmtype
0 0
1 0
2 0
3 1
4 0
\end{filecontents}
\begin{document}
\pgfplotstableread{data.txt}\origtable
\pgfplotstablenew[]{6}\newtable
\pgfplotstablecreatecol[
create col/assign/.code={\pgfkeyslet{/pgfplots/table/create col/next content}\pgfplotstablerow},
]{rowid}\newtable
\pgfplotstablecreatecol[
create col/assign/.code={%
\ifx\pgfmathaccuma\pgfutil@empty
\pgfmathparse{0}%
\let\pgfmathaccuma=\pgfmathresult
\fi
\ifx\pgfmathaccumb\pgfutil@empty
\pgfmathparse{0}%
\let\pgfmathaccumb=\pgfmathresult
\fi
\pgfmathtruncatemacro\orgrow{\pgfplotstablerow-\pgfmathaccuma}%
b:\pgfmathaccumb|
\ifx\pgfmathaccumb=0
\pgfplotstablegetelem{\orgrow}{mmtype}\of\origtable%
\ifx\pgfplotsretval=1
01
\pgfmathparse{\pgfmathaccuma+1}%
\let\pgfmathaccuma=\pgfmathresult%
\pgfmathparse{1}%
\let\pgfmathaccumb=\pgfmathresult%
\fi
\pgfkeyslet{/pgfplots/table/create col/next content}\orgrow%
\else
\orgrow:1
\pgfmathparse{0}%
\let\pgfmathaccumb=\pgfmathresult%
\pgfkeyslet{/pgfplots/table/create col/next content}\orgrow%
\fi
},]{mmtypenewrow}\newtable
\pgfplotstabletypeset\newtable
\end{document}
index我的目标是如果它mmtype等于 1 则重复。例如，当输入数据如下时：
index mmtype
0 0
1 0
2 0
3 1
4 0
输出数据必须是：
mmtypenewrow mmtype
0 0
1 0
2 0
3 1
3 1
4 0
答案1
您正在使用\pgfutil@empty不能使用的地方：在文档中，该字符@不能通常用于制作控制序列，因此结果是与（未定义）\ifx进行比较并且测试为假。\pgfmathaccuma\pgfutil
如何跳过这个问题？要么将代码放在和之间\makeatletter，\makeatother要么定义不同的测试：
\documentclass{article}
\usepackage{pgfplotstable}
\usepackage{filecontents}
\begin{filecontents}{data.txt}
index mmtype
0 0
1 0
2 0
3 1
4 0
\end{filecontents}
%%% Define a macro for testing against `\pgfutil@empty`
\makeatletter
\def\checkforempty#1{TT\fi\ifx#1\pgfutil@empty}
\makeatother
\begin{document}
\pgfplotstableread{data.txt}\origtable
\pgfplotstablenew[]{6}\newtable
\pgfplotstablecreatecol[
create col/assign/.code={\pgfkeyslet{/pgfplots/table/create col/next content}\pgfplotstablerow},
]{rowid}\newtable
\makeatletter
\pgfplotstablecreatecol[
create col/assign/.code={%
\if\checkforempty\pgfmathaccuma
\pgfmathparse{0}%
\let\pgfmathaccuma=\pgfmathresult
\fi
\ifx\checkforempty\pgfmathaccumb
\pgfmathparse{0}%
\let\pgfmathaccumb=\pgfmathresult
\fi
\pgfmathtruncatemacro\orgrow{\pgfplotstablerow-\pgfmathaccuma}%
b:\pgfmathaccumb|
\ifx\pgfmathaccumb=0
\pgfplotstablegetelem{\orgrow}{mmtype}\of\origtable%
\ifx\pgfplotsretval=1
01
\pgfmathparse{\pgfmathaccuma+1}%
\let\pgfmathaccuma=\pgfmathresult%
\fi
\pgfkeyslet{/pgfplots/table/create col/next content}\orgrow%
\else
\orgrow:1
\pgfmathparse{0}%
\let\pgfmathaccumb=\pgfmathresult%
\pgfkeyslet{/pgfplots/table/create col/next content}\orgrow%
\fi
},]{mmtypenewrow}\newtable
\pgfplotstabletypeset\newtable
\end{document}
所以你可以
\if\checkforempty\pgfmathaccuma
代码将会完成您想要做的事情。