TeX, LaTeX and Friends

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David Carlisle

00:26

@PauloCereda I'm sure you could write a CFG to capture xii.tex :-)

Paulo Cereda

@DavidCarlisle :)

Happy Easter!

David Carlisle

@PauloCereda same to you! Good night...

Paulo Cereda

00:41

@DavidCarlisle Good night, David! :)

6 hours later…

Vochmelka

06:20

hey guys, what do you think about using \mathcal for vectors and matrices? I don't like bolding as it highlights the text way too much.

3 hours later…

Parth Kohli

09:12

Hello. I'm new to TeX. Just downloaded TeXMaker and configured it according to the settings given in a tutorial. Then I tried to use the "quick build" command, but it doesn't execute.

Do I need to download anything other than Texmaker?

Joseph Wright

@ParthKohli Yes, a TeX system (MiKTeX or TeX Live)

TeXMaker is just a front-end

Parth Kohli

@JosephWright Ah, thank you.

Thank you.

Oh, I thought it was supposed to do the back-end stuff too.

The only way I'm familiar with LaTeX is MathJax.

Joseph Wright

@ParthKohli No: there are lots of TeX front ends

@ParthKohli That's not LaTeX! It just uses TeX-like input for mathematics

Parth Kohli

@JosephWright Yes, I'm aware. That's why I mentioned "only"

Anyway, it does help me with mathmode.

Joseph Wright

Morning @DavidCarlisle: got through all of the e-mails?

Parth Kohli

09:27

100k is crazy. You must be the cream of LaTeX power users.

Joseph Wright

@ParthKohli We have a very positive approach to voting :-)

@ParthKohli Also, @DavidCarlisle did co-write LaTeX2e!

Parth Kohli

Thanks for entertaining me here. :)

egreg

10:05

Happy Easter to all!

Joseph Wright

@egreg Indeed

egreg

@ParthKohli 100k is not crazy; at least 200k is the level for being considered crazy.

Paulo Cereda

10:34

@egreg Happy Easter! :)

1 hour later…

Parth Kohli

11:42

@egreg Say that to someone with 100 rep.

Paulo Cereda

@ParthKohli You need to start somewhere. :)

Parth Kohli

Oh - for the math guys, is there a package I can use to plot equations automatically given a simple equation?

tikz?

Ah, got it.

Torbjørn T.

@ParthKohli For plotting stuff (data or functions) there is also pgfplots.

Parth Kohli

@TorbjørnT. Yup, that's the one I found.

Argh, I just want to plot f(x) = x^2 on a plane. What's all this I see? :O

Joseph Wright

@ParthKohli Something like

\documentclass[tikz]{standalone}
\usepackage{pgfplots}
\begin{document}

\begin{tikzpicture}
  \begin{axis}
    \addplot[only marks] {x^2};
  \end{axis}
\end{tikzpicture}

\end{document}

Parth Kohli

11:56

I see.

How do I draw a curve?

Joseph Wright

\documentclass[tikz]{standalone}
\usepackage{pgfplots}
\begin{document}

\begin{tikzpicture}
  \begin{axis}
    \addplot[mark = none] {x^2};
  \end{axis}
\end{tikzpicture}

\end{document}

@ParthKohli for example

Parth Kohli

@JosephWright Thank you. :)

Joseph Wright

@ParthKohli BTW, the standalone class is handy for demos and for stuff to be exported: in a 'real' case I guess you'd use article or similar

Parth Kohli

And can I remove those numbers from the axes and just go with the curve?

So many queries. Haha.

Joseph Wright

@ParthKohli Perhaps

\documentclass[tikz]{standalone}
\usepackage{pgfplots}
\begin{document}

\begin{tikzpicture}
  \begin{axis}%
    [
      xtick = \empty ,
      ytick = \empty
    ]
    \addplot[mark = none] {x^2};
  \end{axis}
\end{tikzpicture}

\end{document}

\documentclass[tikz]{standalone}
\usepackage{pgfplots}
\begin{document}

\begin{tikzpicture}
  \begin{axis}%
    [
      xticklabels = \empty ,
      yticklabels = \empty
    ]
    \addplot[mark = none] {x^2};
  \end{axis}
\end{tikzpicture}

\end{document}

Parth Kohli

12:01

@JosephWright Just like that, with the Cartesian plane?

Joseph Wright

@ParthKohli Huh?

Parth Kohli

You seem to know everything about TeX (or Google).

mathcentral.uregina.ca/QQ/database/QQ.09.09/h/jasmine1.1.gif I want a graph like this one... just of y = x^2.

Joseph Wright

@ParthKohli Just move the axes?

Parth Kohli

Oh, OK.

Joseph Wright

\documentclass[tikz]{standalone}
\usepackage{pgfplots}
\begin{document}

\begin{tikzpicture}
  \begin{axis}%
    [
      axis lines  = middle ,
      xticklabels = \empty ,
      yticklabels = \empty
    ]
    \addplot[mark = none] {x^2};
  \end{axis}
\end{tikzpicture}

\end{document}

\documentclass[tikz]{standalone}
\usepackage{pgfplots}
\begin{document}

\begin{tikzpicture}
  \begin{axis}%
    [
      axis lines  = middle ,
      xticklabels = \empty ,
      yticklabels = \empty ,
      ymin        = -25
    ]
    \addplot[mark = none] {x^2};
  \end{axis}
\end{tikzpicture}

\end{document}

perhaps

Parth Kohli

12:05

aha!

Thanks! :)

Joseph Wright

12:44

@HonzaBrabec Not seen you here before

2 hours later…

Joseph Wright

14:24

@percusse Turned into, erm, Rasputin?

@DavidCarlisle Sorted all of the LaTeX2e bugs yet?

percusse

@JosephWright :) Kind of. He is Lyapunov. Big deal in control theory.

@JosephWright I think I should work to make some update to the Simulating hand-drawn lines decoration question tex.stackexchange.com/questions/39296/… . But I really really don't want to touch that one and the xkcd one. Do we really have no way to silently modify them with some magical mod tools?

Maybe I just ask a new question and answer it.

Kartik

15:05

@JosephWright How do you enter code in chat? (Multiline) I tried to do it one day with backticks but it didn't work.

percusse

@Kartik Indent 4 spaces just like the Q/A windows

Or select the part and hit ctrl+k

Kartik

@percusse Ok. Thanks.

egreg

@Kartik Recall also that <key>shift</key>+<key>enter</key> doesn't send the line.

Torbjørn T.

@Kartik Also, if you write a message with multiple lines (shift + enter to add line break) or paste in some code with several lines, a fixed font button will appear on the right.

egreg

@percusse You cheated using tag: for that.

Kartik

15:09

@egreg @TorbjørnT. I didn't know that. Where is the chat help?

Torbjørn T.

@Kartik There's a link on the bottom right of the page.

Kartik

@TorbjørnT. Ok I got it.

percusse

@egreg Well it got you for 10 seconds :)

Kartik

What does 'kick this user' mean?

Torbjørn T.

15:31

@Kartik I guess that is a mod-only thing, for kicking users out of chatrooms. I don't see it at least.

Joseph Wright

16:15

@percusse Edits always show up

Vochmelka

16:49

Are your long codes (>2000 rows) warning-less?

David Carlisle

17:48

@JosephWright easter egg hunt in village, followed by pub:-)

Joseph Wright

@DavidCarlisle :-)

@DavidCarlisle Did you get some rain?

David Carlisle

@JosephWright now, but more or less dry while the children were egg^H^H^Hpine cone searching.

Joseph Wright

@DavidCarlisle Much the same as here, then: pouring now

egreg

18:07

@DavidCarlisle I hope that the pub wasn't dry. ;-)

Paulo Cereda

I wonder who'd thought this could be a good idea in the first place.

Joseph Wright

19:05

@egreg I see even Jon Skeet asks questions!

Q: In a leap year, is the extra month Adar I or Adar II?

I'm implementing support for the Hebrew calendar in Noda Time, my date/time library for .NET. I think I'm mostly there aside from text support (although beta testers would be very welcome!) but one aspect still puzzles me. The Wikipedia Hebrew Calendar entry states that in a leap year, the extra...