☰

将图形更改为对数刻度并添加第二条 Y 轴

tag-icon • tag-icon tikz-pgf
将图形更改为对数刻度并添加第二条 Y 轴

由于“FPGA”（棕色）图表的值非常小（0.0002，绿色不显示），我想改用对数刻度。我尝试使用“ymode=log”，但它使图表变得不稳定。

附加项在此处输入图片描述不仅如此，我还想添加另一个右侧 y 轴来比较吞吐量数据，每个条形图的值范围为 0-2，可能是一条不连续的线图。

\documentclass{article}
\usepackage{pgfplots}
\pgfplotsset{compat=1.17}
\begin{document}\begin{figure}[!h]
\centering
\begin{tikzpicture}
\begin{axis}[
    ybar,
    ymin=0,
    %enlargelimits=0.15,
                legend image code/.code={%
                    \draw[#1, draw=none] (0cm,-0.1cm) rectangle (0.6cm,0.1cm);
                },  
    legend style={at={(0.5,-0.10)},
      anchor=north,legend columns=-1},
    ylabel={Execution Time (ms)},
    symbolic x coords={RGB2GRAY,Gaussian,Box,Sobel},
    xtick=data,
    nodes near coords,
    nodes near coords align={vertical},
    ]
\addplot coordinates {(RGB2GRAY,33) (Gaussian,54)  (Box,127) (Sobel,246)  };%CPU
\addplot [fill=teal!]  coordinates {(RGB2GRAY,8.221) (Gaussian,13.3254)  (Box,14.958) (Sobel,29.935)  };%GPU
\addplot coordinates {(RGB2GRAY,20.234959834) (Gaussian,26.492609995)  (Box,27.353843832) (Sobel,45.59262995) };%FPGA
\legend{CPU,GPU,FPGA}
\end{axis}
\end{tikzpicture}
\caption{Algorithms Excluding Image Read/Write}
\label{imageexclude}
\end{figure}
\end{document}

答案1

这不是一个完整的答案，因为结果并不漂亮。相反，这是为了告诉你它ymode=log确实有效，至少在原则上是这样。结果看起来“不稳定”的原因是默认情况下log origin设置为 1，因此一些条形悬在空中。更改此设置并将重复键放入样式中（我实际上不知道为什么ymode=log不能成为样式的一部分，但这只是一个键）会产生

\documentclass{article}
\usepackage{pgfplots}
\pgfplotsset{compat=1.17}
\begin{document}
\begin{figure}[!h]
\centering
\begin{tikzpicture}
\pgfplotsset{Freon axis/.style={ybar,
    ymin=0.00001,ymax=10000,%<- added ymax
    %enlargelimits=0.15,
                legend image code/.code={%
                    \draw[#1, draw=none] (0cm,-0.1cm) rectangle (0.6cm,0.1cm);
                },  
    legend style={at={(0.5,-0.10)},
      anchor=north,legend columns=-1},
    symbolic x coords={RGB2GRAY,Gaussian,Box, Sobel},
    xtick=data,
    nodes near coords,
    nodes near coords style={anchor=east,rotate=-90,inner xsep=1pt},
    log origin=infty
}}
\begin{axis}[Freon axis,ymode=log,ylabel={Execution Time (ms)}]
\addplot coordinates {(RGB2GRAY,54) (Gaussian,86)  (Box,154) (Sobel,268)  };%CPU
\addplot coordinates {(RGB2GRAY,170.71) (Gaussian, 172.065)  (Box,193.72) (Sobel,215.38)  };%GPU
\addplot coordinates {(RGB2GRAY,20.234959834) (Gaussian,26.492609995)  (Box,27.353843832) (Sobel,45.59262995) };%FPGA
\legend{CPU,GPU,FPGA}
\end{axis}


\begin{axis}[Freon axis,ymode=log,axis y line=right,ytick=\empty,
    ylabel={Throughput}]
\addplot [fill=green] coordinates {(RGB2GRAY,21) (Gaussian,32)  (Box,27) (Sobel,40)  };%CPU
\addplot [fill=green] coordinates {(RGB2GRAY,162.49) (Gaussian, 158.74)  (Box,178.76) (Sobel,169.79)  };%GPU
\addplot [fill=green] coordinates {(RGB2GRAY,0.0002) (Gaussian,0.0002)  (Box,0.0002) (Sobel,0.0002) };%FPGA
\end{axis}
\end{tikzpicture}
\caption{Algorithms Including Image Read/Write.}
\end{figure}
\end{document}

在此处输入图片描述

这是对数的，但并不好看，因为现在棕色条变大了，而红色条变得太小了。可以安装用户转换，但我不确定这是否会为查看者提供您想要传达的信息。

相关内容