Re: [LaTeX][PGF/TikZ] Undefined control sequence error for PGF intersections.

Annada Behera <segfault@tilde.green> wrote or quoted:

% Mark intersection points and draw dashed lines
\foreach \n in {1,...,\t} {
   \path ({i-\n}) coordinate (i\n); %    <--- Error Here
   \fill[black]  (i\n) circle (2pt);
   \draw[dashed] (i\n) -- (i\n |- 0,0);
   \draw[dashed] (i\n) -- (0,0 -| i\n);
}

  Plain TeX to the rescue! What also works here is:

% Mark intersection points and draw dashed lines
\newcount\n
\n=1
\loop
\path ({i-\the\n}) coordinate (i\the\n);
\fill[black]  (i\the\n) circle (2pt);
\draw[dashed] (i\the\n) -- (i\the\n |- 0,0);
\draw[dashed] (i\the\n) -- (0,0 -| i\the\n);
\advance\n by 1
\ifnum\n<5
\repeat