Last Histogram Bar Missing - PgfPlots

Question

I'm trying to plot a logarithmic histogram with bins based on orders of magnitude.

I've got this source:

\documentclass[twocolumn, a4paper]{article}
\usepackage{pgfplots}
\begin{document}

\begin{figure}
\begin{tikzpicture}
\begin{semilogxaxis}[xlabel=Number of Active Satellites, ylabel=Frequency]
\addplot[color=red, ybar interval]
plot coordinates {(5.5,856) (55,110) (550,14) (5500,122)};
\end{semilogxaxis}
\end{tikzpicture}
\caption{Number of active satellites controlled by operator}
\label{fig:satellitesbyoperatorhisto}
\end{figure}

\end{document}

Which produces this output:

You can see that the last bar (1000 <= x < 10000) seems to be missing.

Why?

Answer 1

Let extend me my comment to an answer.

In the package documentation, page 87, is about ybar interval stated:

There is one conceptional difference when working with intervals: an interval is defined by two coordinates. Since ybar has one value for each interval, the ith bar is defined by

1. the y value of the ith coordinates,
2. the x value of the ith coordinate as left interval boundary,
3. the x value of the (i + 1)th coordinate as right interval boundary.

Consequently, there is one coordinate too much: the last coordinate will only be used to determine the interval width; its y value doesn’t influence the bar appearance.

Regarding this, your image, that in case should have four interval bars need additional coordinate for determining last interval. In it is important x-coordinate, , y can be doomy:

\documentclass[twocolumn, a4paper]{article}
\usepackage{pgfplots}
\pgfplotsset{compat=1.18}

\begin{document}

\begin{figure}
\begin{tikzpicture}
\begin{semilogxaxis}[xlabel=Number of Active Satellites, ylabel=Frequency]
\addplot[color=red, ybar interval]
plot coordinates {(5.5,856) (55,110) (550,14) (5500,122) 
                   (55000,0)};  % <--- dummy y vale, just determine last interwal width
\end{semilogxaxis}
\end{tikzpicture}
\caption{Number of active satellites controlled by operator}
\label{fig:satellitesbyoperatorhisto}
\end{figure}

\end{document}