使用“原始 gnuplot”选项将 gnuplot 脚本转换为 pgfplots

Question

内置方法pgfplots仅支持日期，对日期时间的支持有限。

以下是手动组装的解决方案，用于将输入秒转换为某种时间格式。也许这pgfplots最终会成为其中的一部分？

\documentclass{article}

\usepackage{pgfplots}   

\pgfplotsset{compat=1.10}% CF

%use same colors as in foo.gp
\definecolor{red}{HTML}{d40000}
\definecolor{green}{HTML}{339900}
\definecolor{grey}{HTML}{aaaaaa}

\pgfplotsset{width = 70mm}

\def\discardfraction#1.#2\relax{}%

\pgfplotsset{
    % #1: either x,y, or z
    % #2: the time format in the form \hour:\minute:\second or
    %    the value #2 is text which can contain
    %       \secondssincezero (full seconds since time '0')
    %       \Hour, \Minute, \Second
    %       \hour, \minute, \second  (two-digit versions of the above)
    seconds to timeformat/.style 2 args={%
        #1 coord inv trafo/.code={%
            \begingroup
            % 1. truncate everything after the period. 
            \afterassignment\discardfraction
            \count0=##1\relax
            %
            % count1 = the input number.
            \count1=\count0 %
            \edef\secondssincezero{\the\count 1}%
            %
            % compute (full) hours:
            \divide\count0 by3600 %
            \edef\Hour{\the\count0 }%
            % compute minutes
            % minutes = ( -3600*hours + input ) DIV 60.
            \multiply\count0 by-3600 %
            \advance\count0 by\count1 %
            % count1 = input - 3600*hours
            \count1=\count0 %
            \divide\count0 by60 %
            \edef\Minute{\the\count0 }%
            %
            % compute remainder in seconds:
            % seconds = (-60*minutes + input) DIV 60
            \multiply\count0 by-60 %
            \advance\count0 by\count1 %
            \edef\Second{\the\count0 }%
            \xdef\marshal{%
                \noexpand\def\noexpand\secondssincezero{\secondssincezero}%
                \noexpand\def\noexpand\Hour{\Hour}%
                \noexpand\def\noexpand\Minute{\Minute}%
                \noexpand\def\noexpand\Second{\Second}%
            }%
            \endgroup
            \marshal
            \let\hour=\Hour
            \let\minute=\Minute
            \let\second=\Second
            \ifnum\hour<10
                \edef\hour{0\hour}%
            \fi
            \ifnum\minute<10
                \edef\minute{0\minute}%
            \fi
            \ifnum\second<10
                \edef\second{0\second}%
            \fi
            %
            \edef\pgfmathresult{#2}%
        },%
        #1ticklabel=\tick,
        scaled #1 ticks=false,
    },
}

\begin{document}
\pagestyle{empty}

{% TESTS BEGIN
\pgfplotsset{
    seconds to timeformat={x}{\hour:\minute:\second\space [\secondssincezero] = \Hour:\Minute:\Second},
    %
}

\newcommand\TEST[1]{%
    \pgfkeys{/pgfplots/x coord inv trafo={#1}}%
    #1 = \pgfmathresult
}%

\TEST{3906.0}

\TEST{66.0}

\TEST{119.0}

\TEST{6.0}

\TEST{3906.9}

}% TESTS END

\begin{tikzpicture}
    \pgfplotsset{
        set layers,
        enlargelimits=false, % ------- remove white space on the right side
        /pgf/number format/1000 sep=, % ---- use 1000 instead of 1,000
        %seconds to timeformat={x}{\hour:\minute:\second},%
        seconds to timeformat={x}{\hour:\minute},%
        %
        % 15*60 = 900. Make a tick every 15 minutes:
        xtick={0,900,...,16000},%
    }
    \begin{axis}[
        scale only axis,
        xmin = 0,
        axis y line*=left,
        xlabel = {Time [HH:MM]},
        ylabel = {1st y axis},
    ]
    \addplot[color=red, mark=none] table[x index=0,y index=1] {bar.dat};
    \addplot[color=green, mark=none] table[x index=0,y index=2] {bar.dat};
    \end{axis}
    \begin{axis}[
        scale only axis,
        xmin = 0,
            axis x line*= none,  
        axis y line*=right,   
        ylabel near ticks,
        yticklabel pos=right,
        ylabel = {2nd y axis},% -------- missing comma
        ymin = 0,
        ymax = 100,  
        hide x axis,% ---- the x axis is drawn already.
    ]    
    \addplot[color=grey, mark=none] table[x index=0,y index=3] {bar.dat};
    \end{axis}
\end{tikzpicture}
\end{document}

在此处输入图片描述

它采用了基本的 TeX 编程技术（比较我应该从哪里开始 LaTeX 编程？）。

请参阅内联注释以找到解决问题的关键

右侧的空白处：enlargelimits=false
时间格式%H:%M是新样式定义+一些基本测试
是/pgf/number format/1000 sep=。

请注意，我配置xtick为每 15 分钟产生一次滴答声 - 并意识到 foreach 符号0,900,...,16000仍然依赖于 PGF 基本算法。换句话说：它不能扩展到16000秒级之外。我将在待办事项列表中记下pgfplots此限制。

gnuplot我的解决方案根本不需要；您可以依靠和的\addplot table适当选择（尽管是基于 0 的）。x indexy index

Answer 1