[Tex/LaTex] Using pgfplots with x-axis that is not evenly distributed

pgfplotstikz-pgf

I am trying to plot a graph with the the following x-values:

0.01, 0.05, 0.1, 0.2, 0.3, 0.5, 0.6, 0.7, 0.8, and 0.9

When I set them to my xtick values, the numbers get pushed to the left, since they grow at different rates. I'm wondering if there's a way to have the values align to the x-axis properly.

This is how it looks, and my code follows:

\begin{tikzpicture}

\begin{axis}[
    title={Throughput vs. Arrival Rate (N = 10)},
    xlabel={$\lambda$ (Arrival Rate)},
    ylabel={Throughput},
    xmin=0.01, xmax=0.9,
    ymin=0, ymax=10,
    xtick={0.01,0.05,0.1,0.2,0.3,0.5,0.6,0.7,0.8,0.9},
    ytick={0,1,2,3,4,5,6,7,8,9,10},
    legend pos=north west,
    ymajorgrids=true,
    grid style=dashed,
]

% Simulated
\addplot[
    color=blue,
    mark=square,
    line width = 1.2pt,
    ]
    coordinates {
    (0.01,0.111)(0.05,0.0833)(0.1,0.267)(0.2,0.672)(0.3,1.027)(0.5, 3.2)(0.6, 8.1)(0.7,3.2)(0.8, 0)(0.9,0)
    };


\end{axis}
\end{tikzpicture}

Best Answer

I don't really understand what you mean by "properly" here, if you want the ticks to be evenly spaced, use symbolic x coords:

\documentclass{standalone}
\usepackage{pgfplots}
\begin{document}
\begin{tikzpicture}
\begin{axis}[
    title={Throughput vs. Arrival Rate (N = 10)},
    xlabel={$\lambda$ (Arrival Rate)},
    ylabel={Throughput},
    xmin=0.01, xmax=0.9,
    ymin=0, ymax=10,
    symbolic x coords={0.01,0.05,0.1,0.2,0.3,0.5,0.6,0.7,0.8,0.9},
    xtick=data,
    ytick={0,1,2,3,4,5,6,7,8,9,10},
    legend pos=north west,
    ymajorgrids=true,
    grid style=dashed,
]

% Simulated
\addplot[
    color=blue,
    mark=square,
    line width = 1.2pt,
    ]
    coordinates {
    (0.01,0.111)(0.05,0.0833)(0.1,0.267)(0.2,0.672)(0.3,1.027)(0.5, 3.2)(0.6, 8.1)(0.7,3.2)(0.8, 0)(0.9,0)
    };
\end{axis}
\end{tikzpicture}
\end{document}

Related Solutions

[Tex/LaTex] how to set properly ymax and ytick

Apparently, before I commented I changed a few things at once. It is still possible to have a solution but here the main problem is how \foreach produces arrays.

First of all, pgfplots checks the min and max data so in your example there is nothing drawn inside the axis so takes the interval [0,1]. Without data, it will still be this interval no matter what you provide. I don't know if this a feature or something overrides a setting.

When \foreach starts reading the increment in the dotted syntax, it starts adding the increment to the initial point and if it goes beyond last point it discards it, say,

\foreach\x in{1,2,...,4.9}{\x}

will give 1234. So it has to hit something below the last number or exactly the last number.

Here is a compactified version of your problem. See how the numbers get contaminated by TeX arithmetic.

\documentclass[]{standalone}
\usepackage{siunitx,pgfplots}
\pgfplotsset{compat=1.10}
\begin{document}
\begin{tikzpicture}
\begin{axis}[
            ymin = 0.5,
            ymax = 0.88,
            y tick label style={/pgf/number format/.cd,fixed,fixed zerofill=true,precision=6},
            ytick={0.5,0.52,...,0.88},
            ]\addplot {0.7 + (rand)/10};
\end{axis}
\end{tikzpicture}
\end{document}

The easiest solution is to shift the end point ever so slightly, say, 0.8801 and then you'll hit that point.

A possible solution is to implement the \foreach within axis environment with fpu enabled but it looks like quite some work.

enter image description here

[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] how to set properly ymax and ytick

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

Related Question