I just can't make the command plot in TikZ work. For example, even such basic code as




    \draw[very thin,color=gray] (-0.1,-1.1) grid (3.9,3.9);
    \draw[->] (-0.2,0) -- (4.2,0) node[right] {$x$}; 
    \draw[->] (0,-1.2) -- (0,4.2) node[above] {$y$};
    \draw[color=red]   plot (\x,{\x})   node[right] {$f(x)=x$}; 


produces this error, with no PDF output:

ERROR: Package tikz Error: Cannot parse this plotting data.

If it can be of any help, in the .log file I found this message:

Missing character: There is no , in font nullfont!
! Undefined control sequence.
l.11     \draw[color=red]   plot (\x,{\x
                                        })   node[right] {$f(x) =x$};

If I comment out the line containing the plot command, things compile nicely.

Interestingly, if I include \usepackage{pgfplots} in the preamble, then I get a different error message in ltluatex.tex:

ERROR: Undefined control sequence.

--- TeX said ---
l.55 \ifnum\luatexversion
                         <60 %

Btw, I am running TeX Live 2017 on a MacBook Pro. Any help would be greatly appreciated.

UPDATE: Following @Torbjørn T.'s suggestion, I have removed the old version of TikZ from my local tree. While plot is still not working, at least the error message has changed. Now it's:

ERROR: Undefined control sequence.

--- TeX said ---
l.533 \pgfset

The error refers me to the file pgfmoduleshapes.code.tex (2008/02/13 (rcs-revision 1.4)). Thanks in advance.

closed as off-topic by user156344, Stefan Pinnow, Raaja, Mensch, TeXnician Mar 3 at 11:42

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  • 3
    You should to add in your question about problem compilation only with lualatex. With pdflatex there is no problem. – sergiokapone Feb 10 '18 at 18:48
  • 1
    luatex probably still needs \RequirePackage{luatex85} but beside this your code compiles fine and doesn't give your error message. Can you show the log-file? – Ulrike Fischer Feb 10 '18 at 18:56
  • It is possible, the conflict between lualatex with standalone – sergiokapone Feb 10 '18 at 19:02
  • 2
    \RequirePackage{luatex85} goes before \documentclass. Your code works fine here as well, with either lualatex, xelatex or pdflatex. – Torbjørn T. Feb 10 '18 at 19:23
  • 4
    I'm voting to close this question as off-topic because the OP solved the problem himself and posted the solution in a comment. – user156344 Mar 3 at 8:46

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