pgfplots – How to Place Two Graphs Side by Side When One Has a Discontinuity in the Y-Axis

pgfplots

I'm trying to create a two graph Figure with pgfplots. However, the result is not exactly what I want, because I expected the two graphs to appear side by side, but they are oddly aligned instead. In the pgfplot manual (p. 21) one can read

and, therefore, I don't know what I'm doing wrong.

My code is

\documentclass{article}
\usepackage{pgfplots}

\usepgfplotslibrary{fillbetween}

\pgfplotsset{compat = newest}


\begin{document}

\begin{figure}
   \begin{tikzpicture}
      \begin{axis}[
         ticks=none, 
         axis x line=bottom,
         axis y line=left,
         xmin=0,xmax=7,
         ymin=0,ymax=12]
      \addplot[
         domain = 0:7,
         samples =200,
         ] {x};
      \end{axis}
   \end{tikzpicture}
   \begin{tikzpicture}
      \begin{axis}[
         ticks=none, 
         axis x line=bottom,
         axis y line=left,
         axis y discontinuity=crunch,
         xmin=0,xmax=1.3,
         ymin=0.5,ymax=1.3]
      \addplot[
         domain = 0:sqrt(1/3),
         samples =200,
         ] {sqrt(7/6-x^2)};
      \addplot[
         domain = sqrt(1/3):sqrt(7/6),
         fill = gray,
         fill opacity = 0.1,
         samples =200,
         y filter/.expression={x==sqrt(7/6 )?0:y},
         ] {sqrt(7/6-x^2)}\closedcycle;
      \addplot[
         domain = 0:7,
         samples =200,
         ] {sqrt(5/6)};
      \fill[gray, opacity = 0.1] (0,0) -- (0,0.9129) -- (0.5774,0.9129) -- (0.5774,0);
      \end{axis}
   \end{tikzpicture}
\end{figure}

\end{document}

Edit: Is it, perhaps, a consequence of the crunch of the axis in the rightmost graph? I think it is: removing axis y discontinuity=crunch results in the two graphs being aligned.

Adding \usepackage{showframe} shows that the resulting Figure is wider than the margins even when the two diagrams are correctly aligned. However, the misalignement persists when the crunch is present even if the size of the individual plots is reduced to have them fit in the page width.

Best Answer

Community Comment: Normally, it is custom on this site to ask "one question per question" :).
Avtual Answer: Below, you find a proposal for your first question (side-by-side), using \usepgfplotslibrary{groupplots}.
PGFPLOTS Manual Reference: I also added a screenshot from the related section in the manual.

\documentclass{article}

\usepackage{pgfplots}
\usepgfplotslibrary{fillbetween}
\usepgfplotslibrary{groupplots}
\pgfplotsset{compat = 1.18}

\begin{document}

\begin{tikzpicture}
\begin{groupplot}[
    % Shared options for all diagrams.
    group style = {
            group size = 2 by 1
        },
        height = 40mm,
        width = 30mm,
        ]
\nextgroupplot[
         ticks=none, 
         axis x line=bottom,
         axis y line=left,
         xmin = 0,
         xmax = 7,
         ymin = 0,
         ymax = 12,
         ]
\addplot[
         domain = 0:7,
         samples =200,
         ] {x};
\nextgroupplot[
         ticks = none, 
         axis x line = bottom,
         axis y line = left,
         axis y discontinuity = crunch,
         xmin = 0,
         xmax = 1.3,
         ymin = 0.5,
         ymax = 1.3,
         ]
\addplot[
         domain = 0:sqrt(1/3),
         samples = 200,
         ] {sqrt(7/6-x^2)};
\end{groupplot}
\end{tikzpicture}

\end{document}

Remark: \usepackage{showframe} shows that your diagrams are too wide.

Related Solutions

PGFPlots – How to Plot Two Time Series with Bounds Using PGFPlots

This happens because PGFPlots only uses one "stack" per axis: You're stacking the second confidence interval on top of the first. The easiest way to fix this is probably to use the approach described in "Is there an easy way of using line thickness as error indicator in a plot?": After plotting the first confidence interval, stack the upper bound on top again, using stack dir=minus. That way, the stack will be reset to zero, and you can draw the second confidence interval in the same fashion as the first:

\documentclass{standalone}
\usepackage{pgfplots, tikz}

\usepackage{pgfplotstable}

\pgfplotstableread{
temps   y_h y_h__inf    y_h__sup    y_f y_f__inf    y_f__sup    

1   0.237340    0.135170    0.339511    0.237653    0.135482    0.339823    
2   0.561320    0.422007    0.700633    0.165871    0.026558    0.305184    
3   0.694760    0.534205    0.855314    0.074856    -0.085698   0.235411    
4   0.728306    0.560179    0.896432    0.003361    -0.164765   0.171487    
5   0.711710    0.544944    0.878477    -0.044582   -0.211349   0.122184    
6   0.671241    0.511191    0.831291    -0.073347   -0.233397   0.086703    
7   0.621177    0.471219    0.771135    -0.088418   -0.238376   0.061540    
8   0.569354    0.431826    0.706882    -0.094382   -0.231910   0.043146    
9   0.519973    0.396571    0.643376    -0.094619   -0.218022   0.028783    
10  0.475121    0.366990    0.583251    -0.091467   -0.199598   0.016664    
}{\table}

\begin{document}
\begin{tikzpicture}

    \begin{axis}
    % y_h confidence interval
    \addplot [stack plots=y, fill=none, draw=none, forget plot]   table [x=temps, y=y_h__inf]   {\table} \closedcycle;
    \addplot [stack plots=y, fill=gray!50, opacity=0.4, draw opacity=0, area legend]   table [x=temps, y expr=\thisrow{y_h__sup}-\thisrow{y_h__inf}]   {\table} \closedcycle;
    % subtract the upper bound so our stack is back at zero
    \addplot [stack plots=y, stack dir=minus, forget plot, draw=none] table [x=temps, y=y_h__sup] {\table};

    % y_f confidence interval
    \addplot [stack plots=y, fill=none, draw=none, forget plot]   table [x=temps, y=y_f__inf]   {\table} \closedcycle;
    \addplot [stack plots=y, fill=gray!50, opacity=0.4, draw opacity=0, area legend]   table [x=temps, y expr=\thisrow{y_f__sup}-\thisrow{y_f__inf}]   {\table} \closedcycle;

    % the line plots (y_h and y_f)    
    \addplot [stack plots=false, very thick,smooth,blue]  table [x=temps, y=y_h]   {\table};
    \addplot [stack plots=false, very thick,smooth,blue]  table [x=temps, y=y_f]   {\table};
    \end{axis}

\end{tikzpicture}
\end{document}

PGFPlots – How to Hide Empty Ybars in Bar Charts

You can use

 y filter/.expression={y==0 ? nan : y}

in the options of \addplot.

\documentclass{article}

% ---------------------------------- tikz
\usepackage{pgfplots}          % to print charts
\pgfplotsset{compat=1.12}

\begin{document}

\begin{figure}
  \centering
  \begin{tikzpicture}
    \begin{axis} [
      % general
      ybar,
      scale only axis,
      height=0.5\textwidth,
      width=1.2\textwidth,
      ylabel={\# Dots},
      nodes near coords,
      xlabel={Variation},
      xticklabel style={
        rotate=90,
        anchor=east,
      },
      %enlarge x limits={abs value={3}},
      ]
      \addplot+[y filter/.expression={y==0 ? nan : y}] table [
        x=grade,
        y=value,
      ] {
grade   value
-11 0
-10 0
-9  0
-8  0
-7  0
-6  0
-5  3
-4  1
-3  2
-2  15
-1  11
0   179
1   8
2   1
3   0
4   1
5   2
6   0
7   0
8   0
9   0
10  0
11  0
      };
    \end{axis}
  \end{tikzpicture}
\end{figure}
\end{document}

Best Answer

Related Solutions

PGFPlots – How to Plot Two Time Series with Bounds Using PGFPlots

PGFPlots – How to Hide Empty Ybars in Bar Charts

Related Question