[Tex/LaTex] PGFplots: dashed lines

dateplotnode-connectionspgfplotstikz-pgf

How can I do to draw vertical dashed lines which connect markers of one serie with the respective one of the other serie?
X axes for both plot is the same.

MWE:

enter image description here

\documentclass[]{standalone}
\usepackage[T1]{fontenc}
\usepackage{textcomp}
\usepackage[utf8]{inputenc}
\usepackage[italian]{babel}
\usepackage[output-decimal-marker={,}]{siunitx}
\usepackage[]{pgfplots}
\usepackage{pgfplotstable}
\usepgfplotslibrary{dateplot}
\pgfplotsset{/pgf/number format/use comma,compat=newest}
\begin{document}
\begin{tikzpicture}
    \pgfplotsset{title style={at={(0.5,1.07)}}}
    \pgfplotsset{every axis legend/.append style={at={(0.5,1.01)},anchor=south}}
    \begin{axis} [  scale only axis,
                    ymin = 0, ymax = 8.1,
                    axis y line*=left,
                    grid=major,
                    xlabel={Data e ora},
                    ylabel={Velocità down-load (Mib)},
                    title={\textbf{Rilievo velocità internet}},
                    width=10cm, height=7cm,
                    date coordinates in=x,
                    xticklabel style=
                    {rotate=90,anchor=near xticklabel},
                    xticklabel=\day-\month-\year,
                    date ZERO=2014-02-03]
                 ]
        \addplot+
        [thick,cyan,smooth]
        coordinates {
        (2014-02-03 09:15,  7.93)
        (2014-02-03 14:24,  3.11)
        (2014-02-03 15:22,  6.22)
        (2014-02-03 21:05,  4.41)
        (2014-02-04 08:53,  6.26)
        (2014-02-04 17:13,  5.94)
        (2014-02-04 22:00,  1.15)
        (2014-02-05 09:12,  6.87)
        (2014-02-05 15:01,  6.72)
        (2014-02-06 09:28,  7.05)
        (2014-02-06 21:34,  1.2)
        (2014-02-06 23:14,  2.96)
        (2014-02-07 18:01,  6.84)
        (2014-02-08 10:18,  6.77)
        (2014-02-09 14:38,  6.65)
        (2014-02-09 21:14,  1.79)
        (2014-02-10 09:35,  6.33)
        (2014-02-10 21:26,  2.35)
        (2014-02-11 19:56,  3.70)
        (2014-02-12 17:17,  6.51)
        (2014-02-13 15:32,  5.55)
        (2014-02-14 09:13,  6.30)
        (2014-02-14 21:33,  6.24)};
        \label{Dplot}
    \end{axis}
    \begin{axis} [  scale only axis,
                    ymax = 0.43,
                    axis y line*=right,
                    ylabel={Velocità up-load (Mib)},
                    width=10cm, height=7cm,
                    legend style={draw=none},
                    legend cell align=left,
                    legend columns={2},
                    date coordinates in=x,
                    xticklabel style=
                    {rotate=90,anchor=near xticklabel},
                    xticklabel=\day-\month-\year,
                    date ZERO=2014-02-03,
                    axis x line=none
                 ]
        \addlegendimage{/pgfplots/refstyle=Dplot}\addlegendentry{Down-load}
        \addplot+
        [thick,orange,smooth,mark=*,mark options={fill=red}]
        coordinates {
        (2014-02-03 09:15,  0.35)
        (2014-02-03 14:24,  0.36)
        (2014-02-03 15:22,  0.36)
        (2014-02-03 21:05,  0.36)
        (2014-02-04 08:53,  0.37)
        (2014-02-04 17:13,  0.34)
        (2014-02-04 22:00,  0.34)
        (2014-02-05 09:12,  0.33)
        (2014-02-05 15:01,  0.36)
        (2014-02-06 09:28,  0.37)
        (2014-02-06 21:34,  0.36)
        (2014-02-06 23:14,  0.37)
        (2014-02-07 18:01,  0.36)
        (2014-02-08 10:18,  0.36)
        (2014-02-09 14:38,  0.37)
        (2014-02-09 21:14,  0.34)
        (2014-02-10 09:35,  0.37)
        (2014-02-10 21:26,  0.35)
        (2014-02-11 19:56,  0.35)
        (2014-02-12 17:17,  0.36)
        (2014-02-13 15:32,  0.37)
        (2014-02-14 09:13,  0.36)
        (2014-02-14 21:33,  0.37)};
        \addlegendentry{Up-load}
    \end{axis}
\end{tikzpicture}
\end{document}

Best Answer

You can use the error bar functionality for this. Since the plots are on different axes, you'll need to make sure that you know the scaling factor by explicitly setting ymin and ymax.

I've rescaled your upload axis to include 0. I feel that this axis range represents the data more accurately. In your original scale, it looked like the upload rate was almost as volatile as the download rate, but that's really not the case. The casual reader will not notice that the upload axis only covered a very narrow range.

\documentclass[]{standalone}
\usepackage[T1]{fontenc}
\usepackage{textcomp}
\usepackage[utf8]{inputenc}
\usepackage[output-decimal-marker={,}]{siunitx}
\usepackage[]{pgfplots}
\usepackage{pgfplotstable}
\usepgfplotslibrary{dateplot}
\pgfplotsset{/pgf/number format/use comma,compat=newest}
\begin{document}

\pgfplotstableread[col sep=comma]{
        2014-02-03 09:15,7.93,0.35
        2014-02-03 14:24,3.11,0.36
        2014-02-03 15:22,6.22,0.36
        2014-02-03 21:05,4.41,0.36
        2014-02-04 08:53,6.26,0.37
        2014-02-04 17:13,5.94,0.34
        2014-02-04 22:00,1.15,0.34
        2014-02-05 09:12,6.87,0.33
        2014-02-05 15:01,6.72,0.36
        2014-02-06 09:28,7.05,0.37
        2014-02-06 21:34,1.2,0.36
        2014-02-06 23:14,2.96,0.37
        2014-02-07 18:01,6.84,0.36
        2014-02-08 10:18,6.77,0.36
        2014-02-09 14:38,6.65,0.37
        2014-02-09 21:14,1.79,0.34
        2014-02-10 09:35,6.33,0.37
        2014-02-10 21:26,2.35,0.35
        2014-02-11 19:56,3.7,0.35
        2014-02-12 17:17,6.51,0.36
        2014-02-13 15:32,5.55,0.37
        2014-02-14 09:13,6.3,0.36
        2014-02-14 21:33,6.24,0.37
}\datatable

\begin{tikzpicture}
    \pgfplotsset{title style={at={(0.5,1.07)}}}
    \pgfplotsset{every axis legend/.append style={at={(0.5,1.01)},anchor=south}}
    \begin{axis} [  scale only axis,
                    ymin = 0, ymax = 8,
                    axis y line*=left,
                    grid=major,
                    xlabel={Data e ora},
                    ylabel={Velocità down-load (Mib)},
                    title={\textbf{Rilievo velocità internet}},
                    width=10cm, height=7cm,
                    date coordinates in=x,
                    xticklabel style=
                    {rotate=90,anchor=near xticklabel},
                    xticklabel=\day-\month-\year,
                    date ZERO=2014-02-03]
                 ]
        \addplot+
        [thick,cyan]
        table {\datatable};
        \label{Dplot}
    \end{axis}
    \begin{axis} [  scale only axis,
                        ymin=0,
                    ymax = 0.8,
                    axis y line*=right,
                    ylabel={Velocità up-load (Mib)},
                    width=10cm, height=7cm,
                    legend style={draw=none},
                    legend cell align=left,
                    legend columns={2},
                    date coordinates in=x,
                    xticklabel style=
                    {rotate=90,anchor=near xticklabel},
                    xticklabel=\day-\month-\year,
                    date ZERO=2014-02-03,
                    axis x line=none
                 ]
        \addlegendimage{/pgfplots/refstyle=Dplot}\addlegendentry{Down-load}
        \addplot+
        [thick,orange,mark=*,mark options={fill=red},
        error bars/y explicit,
        error bars/y dir=minus,
        error bars/error mark={},
        error bars/error bar style={gray, dashed}]
        table [y index=2, y error expr=(\thisrowno{2}-\thisrowno{1}/10)] {\datatable};
        \addlegendentry{Up-load}
    \end{axis}
\end{tikzpicture}
\end{document}

If you really want one axis to start from a non-zero value, you have to subtract that offset from the length of the error bars. So if your first axis has a range of 8 and your second axis has a range of 0.1 with an offset of 0.3, the expression for calculating the length of the error bars would be

 y error expr=\thisrowno{2}-\thisrowno{1}/(8/0.1)-0.3

\documentclass[]{standalone}
\usepackage[T1]{fontenc}
\usepackage{textcomp}
\usepackage[utf8]{inputenc}
\usepackage[output-decimal-marker={,}]{siunitx}
\usepackage[]{pgfplots}
\usepackage{pgfplotstable}
\usepgfplotslibrary{dateplot}
\pgfplotsset{/pgf/number format/use comma,compat=newest}
\begin{document}

\pgfplotstableread[col sep=comma]{
        2014-02-03 09:15,7.93,0.35
        2014-02-03 14:24,3.11,0.36
        2014-02-03 15:22,6.22,0.36
        2014-02-03 21:05,4.41,0.36
        2014-02-04 08:53,6.26,0.37
        2014-02-04 17:13,5.94,0.34
        2014-02-04 22:00,1.15,0.34
        2014-02-05 09:12,6.87,0.33
        2014-02-05 15:01,6.72,0.36
        2014-02-06 09:28,7.05,0.37
        2014-02-06 21:34,1.2,0.36
        2014-02-06 23:14,2.96,0.37
        2014-02-07 18:01,6.84,0.36
        2014-02-08 10:18,6.77,0.36
        2014-02-09 14:38,6.65,0.37
        2014-02-09 21:14,1.79,0.34
        2014-02-10 09:35,6.33,0.37
        2014-02-10 21:26,2.35,0.35
        2014-02-11 19:56,3.7,0.35
        2014-02-12 17:17,6.51,0.36
        2014-02-13 15:32,5.55,0.37
        2014-02-14 09:13,6.3,0.36
        2014-02-14 21:33,6.24,0.37
}\datatable

\begin{tikzpicture}
    \pgfplotsset{title style={at={(0.5,1.07)}}}
    \pgfplotsset{every axis legend/.append style={at={(0.5,1.01)},anchor=south}}
    \begin{axis} [  scale only axis,
                    ymin = 0, ymax = 8,
                    axis y line*=left,
                    grid=major,
                    xlabel={Data e ora},
                    ylabel={Velocità down-load (Mib)},
                    title={\textbf{Rilievo velocità internet}},
                    width=10cm, height=7cm,
                    date coordinates in=x,
                    xticklabel style=
                    {rotate=90,anchor=near xticklabel},
                    xticklabel=\day-\month-\year,
                    date ZERO=2014-02-03]
                 ]
        \addplot+
        [thick,cyan]
        table {\datatable};
        \label{Dplot}
    \end{axis}
    \begin{axis} [  scale only axis,
                        ymin=0.3,
                    ymax = 0.4,
                    ytick = {0.3,0.35,0.4},
                    axis y line*=right,
                    ylabel={Velocità up-load (Mib)},
                    width=10cm, height=7cm,
                    legend style={draw=none},
                    legend cell align=left,
                    legend columns={2},
                    date coordinates in=x,
                    xticklabel style=
                    {rotate=90,anchor=near xticklabel},
                    xticklabel=\day-\month-\year,
                    date ZERO=2014-02-03,
                    axis x line=none, clip=false
                 ]
        \addlegendimage{/pgfplots/refstyle=Dplot}\addlegendentry{Down-load}
        \addplot+
        [thick,orange,mark=*,mark options={fill=red},
        error bars/y explicit,
        error bars/y dir=minus,
        error bars/error mark={},
        error bars/error bar style={gray, dashed}]
        table [y index=2, y error expr=\thisrowno{2}-\thisrowno{1}/(8/0.1)-0.3] {\datatable};
        \addlegendentry{Up-load}
    \end{axis}
\end{tikzpicture}
\end{document}

Related Solutions

[Tex/LaTex] plotting two time series with bounds

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}

[Tex/LaTex] How to hide empty (value 0) ybars with pgfplots

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}

MWE:

Best Answer

Related Solutions

[Tex/LaTex] plotting two time series with bounds

[Tex/LaTex] How to hide empty (value 0) ybars with pgfplots

Related Question