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I have data which I do not want to change or duplicate it. I would like to have a line number after each empty line. It would be great if this can be done by some presentation only.

Data

This is a sentence. 

This is a sentence 2.

which should be shown like

1 This is a sentence. 

2 This is a sentence 2.

and you can choose where you show the number (margin next to the body etc).

How can you add such linenumbers at the start of each line?

Léo Léopold Hertz 준영
  • 7,906
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    Could you show how you would use this a minimal example? For example, wrapping the lines inside some magical environment, say...? – Werner Jun 15 '15 at 06:44
  • You could use sections. Have a look at Herbert and egreg's answers at this old question of mine. http://tex.stackexchange.com/q/40748/7093 – McGafter Jun 15 '15 at 10:34

1 Answers1

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In plain \TeX nique I would do it this way. "Each empty line", should be \everypar. I removed the need for empty lines by \obeylines.

\newdimen\linenowd\setbox0=\hbox{9999}\linenowd=\wd0
\newdimen\linenoskipamount\linenoskipamount=5pt
\newcount\lineno\lineno=1
\def\linenoskip{\hskip \linenoskipamount}
\def\beginlineno{\begingroup\obeylines\global\advance\lineno by -1\everypar={\global\advance\lineno by 1\hbox to \linenowd{\hfill\the\lineno\linenoskip}}}
\def\endlineno{\endgroup}

\beginlineno
This is a sentence.
This is another sentence.
\endlineno
\bye
ikrabbe
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