我在这里使用答案邮政,生成存储在data.dat
文件中的矩阵的热图。存储在文件中的矩阵data.dat
如下所示:
1.083 0.329 0 -0.139
0.329 -0.683 0.139 4.494e-12
0.329 -0.683 0.139 0
-0.373 -0.379 0.896 -0.215
这只是一个例子,因为我使用相同的脚本来绘制许多不同类型的矩阵。我使用以下 MWE,但图例不正确。它总是绘制值0, 5, 10, 15
而不考虑data.dat
文件。我该如何修复此问题,以便图例根据文件中的矩阵缩放data.dat
。MWE 是:
平均能量损失
\documentclass[tikz]{standalone}
\usepackage{pgfplots}
\usetikzlibrary{pgfplots.colormaps}
\pgfplotsset{compat=1.16}
\usepackage{pgfplotstable}
\usepackage{filecontents}
\newcommand*{\ReadOutElement}[4]{%
\pgfplotstablegetelem{#2}{[index]#3}\of{#1}%
\let#4\pgfplotsretval
}
\begin{document}
\pgfplotstableread[header=false]{data.dat}{\datatable}
\pgfplotstablegetrowsof{\datatable}
\pgfmathtruncatemacro{\numrows}{\pgfplotsretval}
\pgfplotstablegetcolsof{\datatable}
\pgfmathtruncatemacro{\numcols}{\pgfplotsretval}
\xdef\LstX{}
\xdef\LstY{}
\xdef\LstC{}
\foreach \Y [evaluate=\Y as \PrevY using {int(\Y-1)},count=\nY] in {1,...,\numrows}
{\pgfmathtruncatemacro{\newY}{\numrows-\Y}
\foreach \X [evaluate=\X as \PrevX using {int(\X-1)},count=\nX] in {1,...,\numcols}
{
\ReadOutElement{\datatable}{\PrevY}{\PrevX}{\Current}
\pgfmathtruncatemacro{\nZ}{\nX+\nY}
\ifnum\nZ=2
\xdef\LstX{\PrevX}
\xdef\LstY{\PrevY}
\xdef\LstC{\Current}
\else
\xdef\LstX{\LstX,\PrevX}
\xdef\LstY{\LstY,\PrevY}
\xdef\LstC{\LstC,\Current}
\fi
}
}
\edef\temp{\noexpand\pgfplotstableset{
create on use/x/.style={create col/set list={\LstX}},
create on use/y/.style={create col/set list={\LstY}},
create on use/color/.style={create col/set list={\LstC}},}}
\temp
\pgfmathtruncatemacro{\strangenum}{\numrows*\numcols}
\pgfplotstablenew[columns={x,y,color}]{\strangenum}\strangetable
\begin{tikzpicture}
\begin{axis}[every tick label/.append style={font=\normalsize},
xticklabel pos=right,
xlabel near ticks,
xmin=-0.5, xmax=\numcols-0.5,
ylabel style={rotate=-90},
ymin=-0.5, ymax=\numrows-0.5,
point meta=explicit,
colorbar as palette,
colormap/viridis,colorbar sampled,
scale mode=scale uniformly,
]
\draw (axis description cs:0,0) -- (axis description cs:1,0);
\addplot [matrix plot,
point meta=explicit,
] table [meta=color,col sep=comma] \strangetable;
\end{axis}
\end{tikzpicture}
\end{document}
答案1
您需要去掉。将其添加到矩阵图中colorbar as palette
也不会造成任何损害。colorbar source
\documentclass[tikz]{standalone}
\usepackage{filecontents}
\begin{filecontents*}{data.dat}
1.083 0.329 0 -0.139
0.329 -0.683 0.139 4.494e-12
0.329 -0.683 0.139 0
-0.373 -0.379 0.896 -0.215
\end{filecontents*}
\usepackage{pgfplots}
\usetikzlibrary{pgfplots.colormaps}
\pgfplotsset{compat=1.16}
\usepackage{pgfplotstable}
\usepackage{filecontents}
\newcommand*{\ReadOutElement}[4]{%
\pgfplotstablegetelem{#2}{[index]#3}\of{#1}%
\let#4\pgfplotsretval
}
\begin{document}
\pgfplotstableread[header=false]{data.dat}{\datatable}
\pgfplotstablegetrowsof{\datatable}
\pgfmathtruncatemacro{\numrows}{\pgfplotsretval}
\pgfplotstablegetcolsof{\datatable}
\pgfmathtruncatemacro{\numcols}{\pgfplotsretval}
\xdef\LstX{}
\xdef\LstY{}
\xdef\LstC{}
\foreach \Y [evaluate=\Y as \PrevY using {int(\Y-1)},count=\nY] in {1,...,\numrows}
{\pgfmathtruncatemacro{\newY}{\numrows-\Y}
\foreach \X [evaluate=\X as \PrevX using {int(\X-1)},count=\nX] in {1,...,\numcols}
{
\ReadOutElement{\datatable}{\PrevY}{\PrevX}{\Current}
\pgfmathtruncatemacro{\nZ}{\nX+\nY}
\ifnum\nZ=2
\xdef\LstX{\PrevX}
\xdef\LstY{\PrevY}
\xdef\LstC{\Current}
\else
\xdef\LstX{\LstX,\PrevX}
\xdef\LstY{\LstY,\PrevY}
\xdef\LstC{\LstC,\Current}
\fi
}
}
\edef\temp{\noexpand\pgfplotstableset{
create on use/x/.style={create col/set list={\LstX}},
create on use/y/.style={create col/set list={\LstY}},
create on use/color/.style={create col/set list={\LstC}},}}
\temp
\pgfmathtruncatemacro{\strangenum}{\numrows*\numcols}
\pgfplotstablenew[columns={x,y,color}]{\strangenum}\strangetable
\begin{tikzpicture}
\begin{axis}[every tick label/.append style={font=\normalsize},
xticklabel pos=right,
xticklabels={0,1,2,3,4},
yticklabels={0,1,2,3,4},
%
xlabel near ticks,
xmin=-0.5, xmax=\numcols-0.5,
ylabel style={rotate=-90},
ymin=-0.5, ymax=\numrows-0.5,
point meta=explicit,
colormap/viridis,colorbar sampled,
scale mode=scale uniformly,
]
\draw (axis description cs:0,0) -- (axis description cs:1,0);
\addplot [matrix plot,colorbar source,
point meta=explicit,
] table [meta=color,col sep=comma] \strangetable;
\end{axis}
\end{tikzpicture}
\end{document}