[Tex/LaTex] pgfplots: stacking plots in positive and negative y direction in the same diagram

pgfplots

I have several data files which I want to plot in the following manner:

enter image description here

I achieved this with the following code:

\documentclass{minimal}
\usepackage{pgfplots,filecontents}

\begin{filecontents}{total.dos}
0  0  0  0  0  0  0  0   
1  2  0 -2  0  2  0 -2  
2  4  0 -4  0  4  0 -4  
3  2  0 -2  0  2  0 -2  
4  0  0  0  0  0  0  0 
5  1  0 -1  0  0  0  0 
6  2  0 -2  0  0  0  0 
7  1  0 -1  0  0  0  0 
8  0  0  0  0  0  0  0 
\end{filecontents}

\begin{document}
\begin{tikzpicture}
  \begin{axis}[xlabel={Energy [eV]}, ylabel={Intensity}, no markers]
    \addplot [fill=red,draw=none] table [x index=0,y index=5] {total.dos};
    \addplot [fill=red,draw=red,fill opacity=0.25] table [x index=0,y index=1] {total.dos};
    \addplot [fill=red,draw=none] table [x index=0, y index=7] {total.dos};
    \addplot [fill=red,draw=red,fill opacity=0.25] table [x index=0,y index=3] {total.dos};
  \end{axis}
\end{tikzpicture}
\end{document}

My Question:
How can I stack several of those plots?

It should look similar to this:

enter image description here

The problem is that normal stacking doesn't work because this would stack every addplot which leads to wrong output since some y columns of my data have positive and some have negative values for the same x value and pgfplots stacks the plots only in one direction (either positive or negative). But I need to make pgfplots group some addplots, while within the respective groups there is no stacking, and then let it stack the groups. Is this possible?

Update:
I have changed the title of my question since the discussions in the comment section revealed that the crucial point is to make pgfplots plot in the positive and negative y direction at the same time. This way I get the plots to appear the way I want.

Best Answer

Perhaps the below is close to what you want. The trick is to add only the positive columns in a stacked plot, and only the negative columns in another plot that pretends to share the same axes. To work, both the visible and invisible axes must have the same domain. I also used the units pgfplots library to separate the units out.

\documentclass{standalone}
\usepackage{pgfplots,filecontents}
\usepgfplotslibrary{units}
\pgfplotsset{width=6cm,compat=newest}

\begin{filecontents}{total.dos}
0  0  0  0  0  0  0  0   
1  2  0 -2  0  2  0 -2  
2  4  0 -4  0  4  0 -4  
3  2  0 -2  0  2  0 -2  
4  0  0  0  0  0  0  0 
5  1  0 -1  0  0  0  0 
6  2  0 -2  0  0  0  0 
7  1  0 -1  0  0  0  0 
8  0  0  0  0  0  0  0 
\end{filecontents}

\begin{document}
\begin{tikzpicture}
\begin{axis}[
  stack plots=y,
  xlabel={Energy},
  x unit={eV},
  ylabel={Intensity},
  no markers,
  ymin=-10,
  ymax=10
]
  \addplot [fill=red,draw=none] table [x index=0,y index=5] {total.dos}\closedcycle;
  \addplot [fill=blue,draw=none,fill opacity=0.25] table [x index=0,y index=1] {total.dos}\closedcycle;
\end{axis}
\begin{axis}[
  stack plots=y,
  no markers,
  ymin=-10,
  ymax=10,
  xtick=\empty,
  ytick=\empty,
  axis x line=none,
  axis y line=none
]
  \addplot [fill=red,draw=none] table [x index=0, y index=7] {total.dos}\closedcycle;
  \addplot [fill=blue,draw=none,fill opacity=0.25] table [x index=0,y index=3] {total.dos}\closedcycle;
\end{axis}
\end{tikzpicture}
\end{document}

enter image description here

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