# pgfkeys error with pgfplots/colormap

by Philipp Imhof   Last Updated July 11, 2019 19:23 PM

Consider the following MWE:

\documentclass[tikz]{standalone}

\usepackage{tikz,pgfplots}
\pgfplotsset{%
colormap={orangeyellow}{color=(orange) color=(yellow)}
}

\begin{document}
\begin{tikzpicture}
\begin{axis}[
domain=0:180,
y domain=0:360,
z buffer=sort,
colormap/orangeyellow]
\end{axis}
\end{tikzpicture}
\end{document}


I get the error

Package pgfkeys Error: I do not know the key '/tikz/colormap/orangeyellow' and I am going to ignore it. Perhaps you misspelled it.


However, the output is rendered correctly, because (as I suppose) pgfplots automatically uses the last colormap that was defined. This kind of solves the problem for now, but if I were to define to colormaps, I would still need a real solution.

Also (and mainly), I do not understand why pgfkeys thinks I am referring to /tikz/colormap instead of /pgfplots/colormap. It clearly does not do this for the predefined colormap/redyellow, nor for any other of the keys I pass to the axis environment.

Tags :

The correct key to use is colormap name=orangeyellow. See e.g. this related answer for more options.

\documentclass[tikz]{standalone}
\usepackage{pgfplots}
\pgfplotsset{compat=1.16}
\usepgfplotslibrary{colormaps}%
\pgfplotsset{%
colormap={orangeyellow}{
color=(orange) color=(yellow)
},
}

\begin{document}
\begin{tikzpicture}
\begin{axis}[
domain=0:180,
y domain=0:360,
z buffer=sort,
colormap name=orangeyellow]
\end{axis}
\end{tikzpicture}
\end{document}


If you want to use your syntax, you need to define a style of that name.

\documentclass[tikz]{standalone}
\usepackage{pgfplots}
\pgfplotsset{compat=1.16}
\usepgfplotslibrary{colormaps}%
\pgfplotsset{%
colormap={orangeyellow}{
color=(orange) color=(yellow)
},
colormap/orangeyellow/.style={
colormap name=orangeyellow,
},
}

\begin{document}
\begin{tikzpicture}
\begin{axis}[
domain=0:180,
y domain=0:360,
z buffer=sort,
colormap/orangeyellow]
\end{axis}
\end{tikzpicture}
\end{document}

marmot
July 11, 2019 19:11 PM

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