我必须绘制一个大数据集的轮廓图，因此我使用路拉泰克斯作为编译器。此示例也适用于普通乳胶即 latex+dvips+ps2pdf。它在乳胶但对于我拥有的大量数据，我需要使用路拉泰克斯。
我想要绘制从一些 matlab 计算中读取的 2D 轮廓。由于轮廓线非常紧密，我不希望在图中标注，但高度不能完全忽略，应该提及。
因此，我正在寻找的是（最好）用于高度值的彩色条或用于显示高度的其他类型的图例（我主要对数量级感兴趣，而不是这里的一些花哨的细节）。唉，彩色条样式只会产生一个空条。如何才能正确做到这一点？
我最好坚持使用给定的数据格式，而不是使用任何非标准数据输出自己计算点元信息。
看一下我的 MWE（由于数据太多所以相当大）：
\documentclass{article}
\usepackage{pgfplots}
\usepackage{filecontents}
\pgfplotsset{compat=1.10}
\usepgfplotslibrary{colormaps}
\listfiles
\begin{document}
\begin{filecontents*}{contours.txt}
% contours in matlab export format:
% first line: height value | number of points
% empty line: new height contour
% ( -8.000000e-01, +27) ==> contour ' -8.000000e-01', consists of 27 points
% first line is reserved for height value and number of values
-8.000000e-01 +2.700000e+01
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% ( -6.000000e-01, +36) ==> contour ' -6.000000e-01', consists of 36 points
% first line is reserved for height value and number of values
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% ( -4.000000e-01, +47) ==> contour ' -4.000000e-01', consists of 47 points
% first line is reserved for height value and number of values
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% ( -2.000000e-01, +55) ==> contour ' -2.000000e-01', consists of 55 points
% first line is reserved for height value and number of values
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% ( +0.000000e+00, +47) ==> contour ' +0.000000e+00', consists of 47 points
% first line is reserved for height value and number of values
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% ( +2.000000e-01, +55) ==> contour ' +2.000000e-01', consists of 55 points
% first line is reserved for height value and number of values
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% ( +4.000000e-01, +47) ==> contour ' +4.000000e-01', consists of 47 points
% first line is reserved for height value and number of values
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% ( +6.000000e-01, +38) ==> contour ' +6.000000e-01', consists of 38 points
% first line is reserved for height value and number of values
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% ( +8.000000e-01, +27) ==> contour ' +8.000000e-01', consists of 27 points
% first line is reserved for height value and number of values
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+2.213531e+00 +0.000000e+00\end{filecontents*}
\begin{tikzpicture}
\begin{axis}[colorbar, colormap/jet, colorbar horizontal]
\addplot
[
contour prepared,
contour prepared format=matlab,
/pgfplots/contour/labels=false,
]
table {contours.txt};
\end{axis}
\end{tikzpicture}
\end{document}
产生如下所示的输出（红色椭圆体标记问题区域，不属于 pgfplots 输出）
更新 1
根据下面的评论和讨论，我认为这是我正在使用的 pgfplots 版本的问题。仍然更新TeX 3.14159265（TeX Live 2014/W32TeX）没有产生不同的结果。我想我的 pgf 包是最新的，但为了确保这一点，我\listfiles在上面的示例中添加了命令。如果您可以从我的示例中编译出一个填充的颜色条，我很乐意查看您的日志的文件部分以检测版本差异。这是我的文件列表：
*File List*
article.cls 2007/10/19 v1.4h Standard LaTeX document class
size10.clo 2007/10/19 v1.4h Standard LaTeX file (size option)
pgfplots.sty 2014/02/28 v1.10 Data Visualization (1.10-2-gb39fe75)
tikz.sty 2013/12/13 v3.0.0 (rcs-revision 1.142)
pgf.sty 2013/12/18 v3.0.0 (rcs-revision 1.14)
pgfrcs.sty 2013/12/20 v3.0.0 (rcs-revision 1.28)
everyshi.sty 2001/05/15 v3.00 EveryShipout Package (MS)
pgfrcs.code.tex
pgfcore.sty 2010/04/11 v3.0.0 (rcs-revision 1.7)
graphicx.sty 2014/04/25 v1.0g Enhanced LaTeX Graphics (DPC,SPQR)
keyval.sty 2014/05/08 v1.15 key=value parser (DPC)
graphics.sty 2009/02/05 v1.0o Standard LaTeX Graphics (DPC,SPQR)
trig.sty 1999/03/16 v1.09 sin cos tan (DPC)
graphics.cfg 2010/04/23 v1.9 graphics configuration of TeX Live
pdftex.def 2011/05/27 v0.06d Graphics/color for pdfTeX
infwarerr.sty 2010/04/08 v1.3 Providing info/warning/error messages (HO)
ltxcmds.sty 2011/11/09 v1.22 LaTeX kernel commands for general use (HO)
pdftexcmds.sty 2011/11/29 v0.20 Utility functions of pdfTeX for LuaTeX (HO)
ifluatex.sty 2010/03/01 v1.3 Provides the ifluatex switch (HO)
ifpdf.sty 2011/01/30 v2.3 Provides the ifpdf switch (HO)
luatex-loader.sty 2010/03/09 v0.4 Lua module loader (HO)
pgfsys.sty 2013/11/30 v3.0.0 (rcs-revision 1.47)
pgfsys.code.tex
pgfsyssoftpath.code.tex 2013/09/09 (rcs-revision 1.9)
pgfsysprotocol.code.tex 2006/10/16 (rcs-revision 1.4)
xcolor.sty 2007/01/21 v2.11 LaTeX color extensions (UK)
color.cfg 2007/01/18 v1.5 color configuration of teTeX/TeXLive
pgfcore.code.tex
pgfcomp-version-0-65.sty 2007/07/03 v3.0.0 (rcs-revision 1.7)
pgfcomp-version-1-18.sty 2007/07/23 v3.0.0 (rcs-revision 1.1)
pgffor.sty 2013/12/13 v3.0.0 (rcs-revision 1.25)
pgfkeys.sty
pgfkeys.code.tex
pgfmath.sty
pgfmath.code.tex
pgffor.code.tex
tikz.code.tex
filecontents.sty 2011/10/08 v1.3 Create an external file from within a LaTeX
document
supp-pdf.mkii
epstopdf-base.sty 2010/02/09 v2.5 Base part for package epstopdf
grfext.sty 2010/08/19 v1.1 Manage graphics extensions (HO)
kvdefinekeys.sty 2011/04/07 v1.3 Define keys (HO)
kvoptions.sty 2011/06/30 v3.11 Key value format for package options (HO)
kvsetkeys.sty 2012/04/25 v1.16 Key value parser (HO)
etexcmds.sty 2011/02/16 v1.5 Avoid name clashes with e-TeX commands (HO)
epstopdf-sys.cfg 2010/07/13 v1.3 Configuration of (r)epstopdf for TeX Live
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我在其他地方读到过，要使用 lualatex 进行插值着色，需要安装开发 pgfplots 包，但我没有安装（目前不需要进行插值着色）。也许这个空的颜色条是一个额外的错误？
答案1
这似乎是查看器的问题。在这种情况下，以及在出现其他意外显示问题（例如颜色渐变）的情况下，建议使用其他 PDF 查看器检查 PDF 输出。根据 OP，此特定示例由某些版本的 Adobe Acrobat 和 PDF-Xchange 正确呈现。
但是，我不知道为什么 lualatex 没有像 latex 那样渲染这个颜色条，如果有人有线索（可能是不同的 PDF 标题或页面配置？），请分享。