Polar pgfplots seems to be broken

Polar pgfplots seems to be broken

[Gavin]

Hello,

I’m drawing solar system diagrams using the pgfplots module, but the polar library seem to be broken. It looks like it is calling something with a \begin{axis}... command. Here is the error message for a short document, included below.

> tex error       > tex error on line 18 in file /Users/Gavin/Documents/Computer/ConTeXt/Polar Plot Experiments/Untitled.tex: ! Undefined control sequence
> 
> \pgfplots@environment@polaraxis@ [#1]->\begin 
>                                              {axis}[#1,data cs=polar,axis type=polar]
> l.18 		\startpolaraxis[]
> 
> 16     \startsection[title={Polar Plot}]
> 17     	\starttikzpicture	% tikz code
> 18 >>  		\startpolaraxis[]
> 19     			\addplot+[mark=none,domain=0:720,samples=600]{sin(4*x)};
> 20     		\stoppolaraxis
> 21     	\stoptikzpicture
> 22     \stopsection
> 
> mtx-context     | fatal error: return code: 256

I’d love a fix or an idea for a work around. I’m using ConTeXt Suite (ver: 2020.12.15 10:10 MKIV  fmt: 2020.12.16), but I’ve tried it with TeX Live 2020 and the MkIV included with LMTX. Both have the same issue.

Thanks!
Gavin


\usemodule[tikz]			% TikZ module for diagrams
\usemodule[pgfplots]		% PGFPlots module for graphs
\pgfplotsset{compat=1.17}	% Required to get new any features that could cause compatibility issues.
\usepgfplotslibrary[polar]		% ConTEXt

\starttext
\startsection[title={Rectangular Plot}]
	\starttikzpicture% tikz code
		\startaxis[]
			\addplot+[mark=none,domain=0:720,samples=600]{sin(4*x)};
		\stopaxis
	\stoptikzpicture
\stopsection

\startsection[title={Polar Plot}]
	\starttikzpicture	% tikz code
		\startpolaraxis[]
			\addplot+[mark=none,domain=0:720,samples=600]{sin(4*x)};
		\stoppolaraxis
	\stoptikzpicture
\stopsection
\stoptext
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Re: Polar pgfplots seems to be broken

[Aditya Mahajan]

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On Sun, 20 Dec 2020, Gavin wrote:

> Hello,
> 
> I’m drawing solar system diagrams using the pgfplots module, but the polar library seem to be broken. It looks like it is calling something with a \begin{axis}... command. Here is the error message for a short document, included below.
> 
> > tex error       > tex error on line 18 in file /Users/Gavin/Documents/Computer/ConTeXt/Polar Plot Experiments/Untitled.tex: ! Undefined control sequence
> > 
> > \pgfplots@environment@polaraxis@ [#1]->\begin 
> >                                              {axis}[#1,data cs=polar,axis type=polar]
> > l.18 		\startpolaraxis[]
> > 
> > 16     \startsection[title={Polar Plot}]
> > 17     	\starttikzpicture	% tikz code
> > 18 >>  		\startpolaraxis[]
> > 19     			\addplot+[mark=none,domain=0:720,samples=600]{sin(4*x)};
> > 20     		\stoppolaraxis
> > 21     	\stoptikzpicture
> > 22     \stopsection
> > 
> > mtx-context     | fatal error: return code: 256
> 
> I’d love a fix or an idea for a work around. 

This is a bug in pgfplots macro pgfplotsdefineaxistype, which uses an explicit \begin{axis} ... \end{axis} instead of the more portable \axis ... \endaxis. Attached is a quick fix, but it has been quite a while since I looked at pgfplots code, so it may be better to post a bug-report on pgfplots mailing list for a proper fix.

Aditya


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