在 csvsimple 中对 /thecsvrow 数字进行加/减

Question

假设一个简单的例子csvsimple包裹。

\documentclass{standalone}

\usepackage{csvsimple}
\usepackage{fp}
\usepackage[table]{xcolor}

    \begin{filecontents*}{input.csv}
    Foo,Bar,Baz,Qux
    A,1616,0.394,0.309
    B,6999,0.336,0.999
    C,261,0.378,0.284
    D,171,0.332,0.386
    E,402,0.428,0.241
    \end{filecontents*}

\begin{document}

    % COUNT THE ROWS
    \csvreader{input.csv}{}{}%
    \edef\totalrows{\thecsvrow}%
%
    % VISUALIZE TABLE
    \csvreader[tabular=|c|l|c|c|,
    table head=\hline \rowcolor{gray} \# & foo & bar & baz\\\hline\hline, 
    late after line=\\\hline,
    filter expr={
          test{\ifnumgreater{\thecsvinputline}{1}}
      and test{\ifnumless{\thecsvinputline}{5}}
    }
    ]{input.csv}{
        Foo=\foo,
        Bar=\bar,
        Baz=\baz,
        Qux=\qux
    }
%{\FPeval{\result}{\thecsvrow+50} & \textit{\foo} & \bar & \baz}  % NOT WORKING: simply swallows the line numbers
{\thecsvrow & \textit{\foo} & \bar & \baz}

\end{document}

我希望行号（由 定义\thecsvrow）从 51 开始，而不是从 1 开始。因此，行应该显示数字51，52和53在第一列。

我理解建议的（但注释掉的）代码行不可能起作用，因为需要通过再次调用来调用所需的数字\result。尽管如此，我想不出解决这个问题的方法，希望论坛中的某个人能想到。

Answer 1

使用 TeX 原生整数算法进行更改：\the\numexpr50+\thecsvrow\relax。

\documentclass{standalone}

\usepackage{csvsimple}
\usepackage{fp}
\usepackage[table]{xcolor}

    \begin{filecontents*}{input.csv}
    Foo,Bar,Baz,Qux
    A,1616,0.394,0.309
    B,6999,0.336,0.999
    C,261,0.378,0.284
    D,171,0.332,0.386
    E,402,0.428,0.241
    \end{filecontents*}

\begin{document}

    % COUNT THE ROWS
    \csvreader{input.csv}{}{}%
    \edef\totalrows{\thecsvrow}%
%
    % VISUALIZE TABLE
    \csvreader[tabular=|c|l|c|c|,
    table head=\hline \rowcolor{gray} \# & foo & bar & baz\\\hline\hline, 
    late after line=\\\hline,
    filter expr={
          test{\ifnumgreater{\thecsvinputline}{1}}
      and test{\ifnumless{\thecsvinputline}{5}}
    }
    ]{input.csv}{
        Foo=\foo,
        Bar=\bar,
        Baz=\baz,
        Qux=\qux
    }
%{\FPeval{\result}{\thecsvrow+50} & \textit{\foo} & \bar & \baz}  % NOT WORKING: simply swallows the line numbers
{\the\numexpr50+\thecsvrow\relax & \textit{\foo} & \bar & \baz}

\end{document}

如果您想要最初尝试的方法，则只需在单元格末尾fp添加即可。这是因为进行计算并将其存储在中，但不输出任何内容。但是，在该状态下，输出是浮点数，具有像这样的条目。因此，您还需要ate 才能获得与上面相同的输出：\result\FPeval{\result}{\thecsvrow+50}\result51.0000000000000\FPtrunc

\documentclass{standalone}

\usepackage{csvsimple}
\usepackage{fp}
\usepackage[table]{xcolor}

    \begin{filecontents*}{input.csv}
    Foo,Bar,Baz,Qux
    A,1616,0.394,0.309
    B,6999,0.336,0.999
    C,261,0.378,0.284
    D,171,0.332,0.386
    E,402,0.428,0.241
    \end{filecontents*}

\begin{document}

    % COUNT THE ROWS
    \csvreader{input.csv}{}{}%
    \edef\totalrows{\thecsvrow}%
%
    % VISUALIZE TABLE
    \csvreader[tabular=|c|l|c|c|,
    table head=\hline \rowcolor{gray} \# & foo & bar & baz\\\hline\hline, 
    late after line=\\\hline,
    filter expr={
          test{\ifnumgreater{\thecsvinputline}{1}}
      and test{\ifnumless{\thecsvinputline}{5}}
    }
    ]{input.csv}{
        Foo=\foo,
        Bar=\bar,
        Baz=\baz,
        Qux=\qux
    }
{\FPeval{\result}{\thecsvrow+50}\FPtrunc\result{\result}{0}\result & \textit{\foo} & \bar & \baz}  % NOT WORKING: simply swallows the line numbers
%{\the\numexpr50+\thecsvrow\relax & \textit{\foo} & \bar & \baz}

\end{document}