Lyx - how to create sections without titles - lyx

I'm currently looking into lyx because I'm starting to get fed up with writing LaTeX by hand. The problem is, LyX seems to be a bit opiniated about how sections should be written - I'm used to writing
\subsection{}
\subsubsection{}
...
\subsubsection{}
etc., because in the documents I'm writing I don't want titles for my sections. I just want them to be numbered. LyX doesn't seem to like that though, and ends up deleting my sections (and subsections, and subsubsections) when I don't have any text in their titles.
I can just insert a hard space, but this feels kind of weird. I don't understand why lyx wouldn't just let me hit enter and be done with it.

Try to us a 'hard space' as title of the sections, through <Ctrl>+<space>, that should do the trick (it's the keyboard shortcut for LaTeX's "~").

You can insert Evil Red Text (raw LaTeX commands) in LyX. Look for Insert -> TeX Code menu. I just tried it and inserted \subsection{} inside the ERT, and it compiled successfully and showed the section numbers.

Related

Line break in R Markdown documents without two spaces

I am trying to use R Markdown documents for report writing in a way I used Word before for a couple of months. While RStudio/Markdown is generally great, there is one thing that keeps embarrassing me: the need to input two spaces to force a line break. My whole life related to writing on the computer screen is a life when pressing Enter means breaking the line. Moreover, I see in the editor that line is broken and new paragraph starts, but after the compilation of Rmd-file I see a wall of text, without line breaks, and have to go back and check whether all line endings have two spaces on their end. It is awful. I understand that maybe I need to develop a habit to input two spaces (which does not seem intuitive), but it is hard.
Is there a way to enforce Markdown parser in RStudio count end of the line in Rmd document as a line break, so I can avoid entering two spaces to force a line break? Maybe, there are workarounds, like RStudio addins or something else? I have searched these on the Internet but has not found any.

Edit text/comments of rmarkdown and knitr reports without rerunning code

I love knitr & rmarkdown, but I often find myself in situations where I have a lengthy report that takes some nontrivial amount of time to run. After it's generated, I notice my inevitable typos in text. However, re-knitting everything to just fix a couple typos (just in text, not code) takes a long time and seems avoidable. I was about to start taking a hack at developing my own solution to this, but I'm thinking it's the kind of thing that could already have a mature solution which would likely be more robust than the one I'd build.
I'm wondering if there is solution out there within knitr or third party that would allow me to edit just the text of my reports without rerunning code, generating plots and outputs etc. I know, I can simply edit the generated html text, but then those changes must be replicated in the R/Rmd code that generated it, or they get out of sync. I'm envisioning a function like this:
argument 1: the R/Rmd script with text edits (no code changes)... perhaps a warning is generated when code chunks change
argument 2: the html output file from the last time the R script in argument was knitted without the text edits.
return: the html report (argument 2) updated with the comments in the R/Rmd script (argument 1).
I use the cache option sometimes for large datasets. I toggle eval and echo on and off when developing if I'm just working on the text of my report. However, I'm looking for a function that would take care of all this for me, so one doesn't have to mess with the code and chunk options to make small edits to text.
Here's an interim solution that lets you retain the speed of making changes directly to the rendered text, but you have to do a little work after you're done making changes.
Assuming the following files:
input.knitr is the original Knitr file with text and code integrated.
output.html is the resulting HTML code that has been rendered by Knitr.
Consider making direct text edits to output.html and then running something like Meld visual merge tool:
meld output.html input.knitr
Then manually select the edits in output.html that are new and should be fixed in the original source input.knitr. Tools such as Meld do a pretty good job of aligning the texts so that the chunks and knitted output will appear as large "changes" that, in practice, you would ignore. You would focus on the small changes in the non-chunk sections.

how can I make footnotes on the bottom of the page insteand of the end of the document in the python programming language

I am using .. [2] / [2]_ style footnotes in restructuredText. I would like them to be displayed on the end of the page where they occur rather than at the end of the document. How can I go about this? I need a solution that works with rst2latex.
/please refrain from classifying this as of topic. restructuredText is part of the PYTHON programming language.
The LaTeX writer in docutils uses \footnotetext to specify the page at the bottom of which the footnote text should appear. If you want the text to appear at the same page as its mark, you can try to put them close together.
If you want to directly use the \footnote command in LaTeX, you will have to create a new LaTeX writer, probably by extending the LaTeXTranslator class in docutils.writers.latex2e and overload the visit_footnote_reference function. There, search for the footnote content in self.document.footnotes, and write a \footnote command to the output. Also overload visit_footnote and do nothing there (raise nodes.SkipNode).
Alternatively, you can redefine some TeX command to generate the text at the correct position, probably in two passes to get the footnotes marks and contents at first.

knitr: Document does not change anymore

I have a .Rnw document in which I include childs. The childs produce tables via the 'latex' command of the Hmisc library in R.
When I make changes in the child documents, these changes do not anymore change the pdf document. My first guess was to use the chunk option 'eval=TRUE', but this does not change anything. Then, I saw, that the tables are actually saved to a .tex file with same name as the .Rnw document. I deleted this file and after compilation with knitr I got an error:
Error: Latexmk: Could not find file documentname.tex.
I assume, this is not the way to do it. Now I am out of ideas what to do. I appreciate some help on my problem.
Best
Simon
Allright, when trying to construct a simple example, I actually found out, that neither the packages I included nor the nesting of child documents interfere with the compilation via knitr. The reason was a simple error in the low-level .Rnw document, where a Hmisc latex table had a label, that missed a closing speech mark.
This causes then the output pdf not to change - I assume, that in this case the already constructed .tex file is included instead of letting knitr recompile the .Rnw documents and this hasn't changed since the last compilation?
What I wonder about is the different format of the landscape ctable in the document. Using a simple knitr document just with \documentclass{article} produces well placed tables. In my document using a template for the JFE, I get a table that extends over the whole page and even in footnotesize it is far away from the great appearance in the simple document. There is only a margin of less than half a cm on the right and the left. Page size is the same: both US letter... Can I probably control that via knitr or only via resizebox?

Annotating Adobe Reader PDFs with math symbols

Many of the math textbooks and other literature I read is in PDF format, so I frequently find myself annotating these with the Adobe Reader comments tool.
I did find a helpful guide here, but sometimes I'd like the option of inserting math symbols, too. Has anyone found a reliable way to insert math symbols, TeX, or other arbitrary formatting into the annotations?
So far, the best I've come up with is to enter the unicode prefixed by "0x" and hit alt+X after it. Maybe with the Adobe javascript SDK you could write a script to shortcut this.
I don't think any of the current commercial editors make this easy, which is too bad. I am sure the vendors monitor this site, so there is hope.
In the meantime, here is a manual workaround.
Use tikz to create your comment boxes. Here are the two examples I found to be most relevant: Boxes and Positioning. Play around with the options to get both the shape and the placement you want. Generate a pdf file from the latex source that contains your comments.
IMPORTANT: if your comments end before the last page of the original document, insert:
\pagebreak{} % create empty page
\thispagestyle{empty} % get rid of page numbers et al
~ % put a space so the page gets generated
before your \end{document}, to get an empty last page. The following command will reuse the last page of your comments document on all subsequent pages of the original document.
Use a recent version of pdftk with the multistamp command to overlay your equations file with your original file like so:
pdftk original.pdf multistamp comments.pdf output out.pdf
Also see this question.
The free (as speech) PDF tool, Okular, supports this functionality by putting latex formula directly between $$...$$.

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