我如何在组之间留出空间，以使条形图不再互相重叠？
我以为它会自动将它们隔开
\documentclass{article}
\usepackage{pgfplots}
\pgfplotsset{compat=1.17}
\begin{document}
\begin{tikzpicture}
\begin{axis}[
ybar,
ymin=0,ymax=400,
%enlargelimits=0.15,
legend image code/.code={%
\draw[#1, draw=none] (0cm,-0.1cm) rectangle (0.6cm,0.1cm);
},
ymajorgrids = true,
legend style={at={(0.5,-0.10)},
anchor=north,legend columns=-1},
ylabel={Execution Time (ms)},
symbolic x coords={R2G,Gaussian,Box,Sobel, Total Edge},
xtick=data,
nodes near coords,
nodes near coords style={anchor=west,rotate=90,inner xsep=1pt},
]
\addplot coordinates {(R2G,33) (Gaussian,54) (Box,127) (Sobel,246) (Total Edge, 145) };%CPU
\addplot [fill=teal!] coordinates {(R2G,8.221) (Gaussian,13.3254) (Box,14.958) (Sobel,29.935) (Total Edge, 43) };%GPU
\addplot coordinates {(R2G,20.234959834) (Gaussian,26.492609995) (Box,27.353843832) (Sobel,45.59262995) (Total Edge, 73.31923) };%FPGA
\addplot coordinates {(R2G,21.467651233) (Gaussian,38.359383243) (Box,40.454379543) (Sobel,48.592629955) (Total Edge, 81.31923) };%HLS
\legend{CPU,GPU,FPGA,HLS}
\end{axis}
\end{tikzpicture}
\end{document}
答案1
我很乐意删除它，但bar width=6pt我得到
\documentclass{article}
\usepackage{pgfplots}
\pgfplotsset{compat=1.17}
\begin{document}
\begin{tikzpicture}
\begin{axis}[bar width=6pt,
ybar,
ymin=0,ymax=400,
%enlargelimits=0.15,
legend image code/.code={%
\draw[#1, draw=none] (0cm,-0.1cm) rectangle (0.6cm,0.1cm);
},
ymajorgrids = true,
legend style={at={(0.5,-0.20)},
anchor=north,legend columns=-1},
ylabel={Execution Time (ms)},
symbolic x coords={R2G,Gaussian,Box,Sobel, Total Edge Detection},
xtick=data,
nodes near coords,
nodes near coords style={anchor=west,rotate=90,inner xsep=1pt},
x tick label style={text width=5em,anchor=north,align=center}
]
\addplot coordinates {(R2G,33) (Gaussian,54) (Box,127) (Sobel,246)
(Total Edge Detection, 145) };%CPU
\addplot [fill=teal!] coordinates {(R2G,8.221) (Gaussian,13.3254)
(Box,14.958) (Sobel,29.935) (Total Edge Detection, 43) };%GPU
\addplot coordinates {(R2G,20.234959834) (Gaussian,26.492609995)
(Box,27.353843832) (Sobel,45.59262995) (Total Edge Detection, 73.31923) };%FPGA
\addplot coordinates {(R2G,21.467651233) (Gaussian,38.359383243)
(Box,40.454379543) (Sobel,48.592629955)
(Total Edge Detection, 81.31923) };%HLS
\legend{CPU,GPU,FPGA,HLS}
\end{axis}
\end{tikzpicture}
\end{document}
所以我无法重现你的评论结果。
附录：如果希望勾选文本超过两行，一个选项是进行text width适当设置。
答案2
这是 TeX.SX 上经常报告的一个“问题”。对我来说，解决方案是提供bar width和bar shift提供轴单位而不是长度。然后你只需要找到符合你审美的这两个键的对，然后就可以改变轴而不改变条形宽度、一个组中的分离和组间分离之间的相对关系。但这只有在不使用width时才能完成。symbolic coords
并且符号坐标 (几乎？) 总是与 一起使用。对于这两者，我 (个人) 认为与使用提供更多灵活性的\addplot coordinates表格 (即 ) 相比，没有任何优势。\addplot table
这是我提出的解决方案以及对您的代码的一些其他改进。
- 从中创建数据表
\addplot coordinates。 xticklabels从数据表创建。- 状态
bar width和bar shift（绝对）轴坐标。 - 现在您可以自由缩放轴
width。
以下是一些与你相关的问题及其答案
你可以做的额外事情
到目前为止，有了这个解决方案，您甚至可以更进一步，\addplot在循环中添加 s，而不是逐个添加。为此，请参阅例如的答案
如果你这样做，还有一点我至今还没有解决：我删除了第二个\addplot命令的手动设置颜色（因为这与回答你的问题无关）。当然，在使用循环时，你不能再将颜色作为命令的选项\addplot。但你可以创建自己的cycle list颜色并调用它。为此，请参阅PGFPlots 手册 (v1.17) 第 4.7.7 节当然，您也可以在 TeX.SX 上找到示例。
现在你可能会想：“我为什么要做这些事情？这似乎比我的“简单”解决方案需要更多的工作/代码。”你完全正确。但是真实的当你创造时，好处就来了样式有了这些。然后你确保你的所有图看起来都很相似，而且更改也很容易全部只需更改样式即可更改轴/图。不幸的是，我这里没有好的例子，因为 TeX.SX 上的问题通常与此主题无关。但我会举一些非常基本的例子，也许您可以想象更改内容是多么简单，也许还可以想象，如果您将样式结合起来。
- https://tex.stackexchange.com/a/383403/95441
- https://tex.stackexchange.com/a/502754/95441
- https://tex.stackexchange.com/a/417423/95441
- https://tex.stackexchange.com/a/303284/95441
% used PGFPlots v1.17
\documentclass[border=5pt]{standalone}
\usepackage{pgfplotstable}
% use this `compat' level or higher to be able to provide (relative) axis
% units to `bar width' and `bar shift'
\pgfplotsset{compat=1.7}
\begin{document}
\begin{tikzpicture}[
% step 3a:
% define the values for the width and shift of the bars
% (the total "width" at one coordinate is 1. So the sum of the two
% values should be maximum 1 so the bars don't overlap.)
% (The values could also be given directly to the keys, but this here is
% more general and allows arbitrary calculations of the values.
% So one could e.g. also first get the number of columns in the data
% table and compute `BarWidth` from that.)
/pgf/declare function={
BarWidth = 0.175;
BarShift = BarWidth/2 + 0.05;
},
]
% step 1:
% create a data table
% (when there is a space in a string it needs to be surrounded by curly brackets
% or one could use another `col sep`)
\pgfplotstableread{
x CPU GPU FPGA HLS
R2G 33 8.221 20.234959834 21.467651233
Gaussian 54 13.3254 26.492609995 38.359383243
Box 127 14.958 27.353843832 40.454379543
Sobel 246 29.935 45.59262995 48.592629955
{Total \\ Edge} 145 43 73.31923 81.31923
}\mydata
\begin{axis}[
% % step 4:
% % adjust the `width` of the `axis` to your needs
% width=\textwidth,
% step 3b:
% use the above defined values
/pgf/bar width=BarWidth,
/pgf/bar shift=BarShift,
ybar,
ymin=0,
ymax=300,
enlarge x limits={abs=0.5},
ylabel={Execution Time (ms)},
xtick=data,
% step 2:
% use `xticklabels from table` instead of stating `symbolic x coords`
xticklabels from table={\mydata}{x},
% (when you manually add line breaks you need to state how the text
% should be aligned)
xticklabel style={
align=center,
},
ymajorgrids=true,
nodes near coords,
nodes near coords style={
anchor=west,
rotate=90,
},
legend image code/.code={%
\draw[#1, draw=none] (0cm,-0.1cm) rectangle (0.6cm,0.1cm);
},
legend style={
% (use `xticklabel cs:` so you don't have to care about the `yshift`)
at={(xticklabel cs:0.5)},
anchor=north,
legend columns=-1,
},
% use the `\coordindex` for all plots
table/x expr={\coordindex},
]
\addplot table [y=CPU] {\mydata};
\addplot table [y=GPU] {\mydata};
\addplot table [y=FPGA] {\mydata};
\addplot table [y=HLS] {\mydata};
\legend{CPU,GPU,FPGA,HLS}
\end{axis}
\end{tikzpicture}
\end{document}
