# TikZ trees grow right typesets things “upside down”

This is a pretty minor gripe with what is a great library.

\documentclass[border=3em]{standalone}
\usepackage{tikz}
\usetikzlibrary{trees}
\begin{document}
\begin{tikzpicture}[grow=right]
\node {a}
child {
node {b}
}
child{
node {c}
};
\end{tikzpicture}
\end{document}


This MWE produces the following output:

Note that despite the b node being written before the c node, it is the c node that is on top. This is unintuitive. I'd have expected the b node to be on top, since it's defined first.

I understand why it works that way because without the grow=right option, things are typeset in the obvious order. What I want to know is:

Is there an easy way to have right-growing trees set their nodes in the order you'd expect from reading the source?

# Edit

Matthew's suggestion in the comments works well for basic trees. Unfortunately, it breaks the sloped option:

\documentclass[border=3em]{standalone}
\usepackage{tikz}
\begin{document}
\begin{tikzpicture}
\begin{tikzpicture}[grow=right,yscale=-1,sloped]
\node {a}
child {
node {b}
edge from parent
node[above] {Foo}
}
child{
node {c}
};
\end{tikzpicture}
\end{tikzpicture}
\end{document}


-
\node[yscale=-1] ? –  Matthew Leingang May 19 '11 at 14:29
@Matthew Nope. That turns the node upside down and leaves its children in the wrong order still. –  Seamus May 19 '11 at 15:43
@Matthew ah, as an option to the tikzpicture environment that works. Not as an option on the node –  Seamus May 19 '11 at 15:45
That was why I put the question mark and made it a comment—a stab in the dark to test. –  Matthew Leingang May 19 '11 at 17:48

You simply can use the grow' option instead: (pgfmanual v2.10, p.219)

This key has the same effect as grow, only the children are arranged in the opposite order.

\documentclass[border=0,png]{standalone}
\usepackage{tikz}
\usetikzlibrary{trees}
\begin{document}
\begin{tikzpicture}[grow'=right]
\node {a}
child {
node {b}
}
child{
node {c}
};
\end{tikzpicture}
\end{document}


-
how do you get your standalone images to be bigger? I tried that and they come out really small. I cheated and zoomed in the PDF and took a screen shot of it to get the picture a reasonable size! –  Seamus May 19 '11 at 17:00
@Seamus: With the current develop version it is convert={size=<X>x<Y>,...} or shorter png={size=<X>x<Y>}. I also have a tex.sx option to set the maximum size of 630px. Everything above is zoomed down on stackexchange. –  Martin Scharrer May 19 '11 at 17:06
@Seamus: helps to be the developer :-P –  Matthew Leingang May 19 '11 at 17:48
and for us mere mortals that have the version on CTAN, when will we get these options? ;) –  Seamus May 19 '11 at 23:01
@Seamus: Hopefully soon. However, the develop version is available under latex.scharrer-online.de/standalone/browser/dev. Also try the "nightly builds" listed on latex.scharrer-online.de/standalone. –  Martin Scharrer May 20 '11 at 0:16