[Tex/LaTex] Plotting .dat file in pgfplot with multiple columns

pgfplots

I'm trying to use pgfplots with a .dat file to plot multiple data points on a graph, but for some reason it's plotting the same two columns over and over again, what have I done wrong?. The .dat file I'm using looks like this:

eang    disppos dispvel dispacc 
0.0000  50.0000 0.0000  -32.8125
1.0000  49.9950 -0.5726 -32.8043
2.0000  49.9800 -1.1450 -32.7796
3.0000  49.9550 -1.7168 -32.7386
4.0000  49.9201 -2.2877 -32.6811
5.0000  49.8752 -2.8575 -32.6073
6.0000  49.8204 -3.4258 -32.5172
7.0000  49.7556 -3.9924 -32.4108
8.0000  49.6810 -4.5571 -32.2882
9.0000  49.5966 -5.1194 -32.1495
10.0000 49.5023 -5.6792 -31.9948  
11.0000 49.3983 -6.2361 -31.8241
12.0000 49.2847 -6.7900 -31.6376
13.0000 49.1613 -7.3404 -31.4354
14.0000 49.0284 -7.8872 -31.2176
15.0000 48.8860 -8.4300 -30.9844
16.0000 48.7342 -8.9687 -30.7358
17.0000 48.5730 -9.5028 -30.4721

\pgfplotstableread{pistonkinetics.dat}{\pistonkinetics}
\begin{tikzpicture}[scale=1]
\begin{axis}[minor tick num=1,
xlabel=Degrees]
\addplot [x={eang}, y={disppos},black,very thick] table {\pistonkinetics};
\addplot [x={eang}, y={dispvel},dashed,red,very thick] table {\pistonkinetics};
\addplot [x={eang}, y={dispacc},dashed,blue,very thick] table {\pistonkinetics};
\end{axis}
\end{tikzpicture}

Best Answer

The x and y options need to be supplied to the table part of the \addplot command, not to \addplot itself:

\documentclass[]{article}
\usepackage{filecontents,pgfplots}

\begin{filecontents}{pistonkinetics.dat}
eang    disppos dispvel dispacc 
0.0000  50.0000 0.0000  -32.8125
1.0000  49.9950 -0.5726 -32.8043
2.0000  49.9800 -1.1450 -32.7796
3.0000  49.9550 -1.7168 -32.7386
4.0000  49.9201 -2.2877 -32.6811
5.0000  49.8752 -2.8575 -32.6073
6.0000  49.8204 -3.4258 -32.5172
7.0000  49.7556 -3.9924 -32.4108
8.0000  49.6810 -4.5571 -32.2882
9.0000  49.5966 -5.1194 -32.1495
10.0000 49.5023 -5.6792 -31.9948  
11.0000 49.3983 -6.2361 -31.8241
12.0000 49.2847 -6.7900 -31.6376
13.0000 49.1613 -7.3404 -31.4354
14.0000 49.0284 -7.8872 -31.2176
15.0000 48.8860 -8.4300 -30.9844
16.0000 48.7342 -8.9687 -30.7358
17.0000 48.5730 -9.5028 -30.4721
\end{filecontents}

\begin{document}
\pgfplotstableread{pistonkinetics.dat}{\pistonkinetics}
\begin{tikzpicture}[scale=1]
\begin{axis}[minor tick num=1,
xlabel=Degrees]
\addplot [black,very thick] table [x={eang}, y={disppos}] {\pistonkinetics};
\addplot [dashed,red,very thick] table [x={eang}, y={dispvel}] {\pistonkinetics};
\addplot [dashed,blue,very thick] table [x={eang}, y={dispacc}] {\pistonkinetics};
\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}

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