tree visualization

[arademaker]

https://github.com/udapi/udapi-python/blob/master/udapi/block/write/textmodetrees.py#L20

We need some similar feature for printing a sentence as a tree. This trees are very useful for visualize the data:

─┮
 ╰─┮ Gosto VERB root
   │ ╭─╼ de ADP mark
   ├─┾ levar VERB xcomp
   │ │ ╭─╼ a ADP case
   │ ├─┶ sério NOUN xcomp
   │ │ ╭─╼ o DET det
   │ │ ├─╼ meu DET det
   │ ╰─┾ papel NOUN obj
   │   │ ╭─╼ de ADP case
   │   ╰─┾ consultor NOUN nmod
   │     ╰─╼ encartado VERB acl
   ╰─╼ . PUNCT punct

alternatives:

convert conllu to tex and compile it

 udapy write.Tikz attributes=form,lemma,upos < my.conllu > my.tex

If needed I can add more features to
https://github.com/udapi/udapi-python/blob/master/udapi/block/write/tikz.py
e.g. printing multiword tokens and some default colors.
Of course, for camera-ready pictures a bit of manual fine-tuning of the layout will be needed.

You can try also

udapy write.TextModeTrees color=1 < my.conllu | less -R

output above.

• https://github.com/udapi/udapi-python/blob/master/udapi/block/write/textmodetrees.py
  either use in verbatim without colors, or subclass so it generates TeX syntax for colors (and texttt/verb), similarly as in
  https://github.com/udapi/udapi-python/blob/master/udapi/block/write/textmodetreeshtml.py

• https://github.com/udapi/udapi-python/blob/master/udapi/block/write/html.py
  for html+javascript output like
  http://ufallab.ms.mff.cuni.cz/~popel/czeng1.6-sample.html

There is a button for SVG export and you can use
inkscape -D -z --file=image.svg --export-pdf=image.pdf --export-latex
to export it to pdf and tex:
\begin{figure}
\centering
\def\svgwidth{\columnwidth}
\input{image.pdf_tex}
\end{figure}

Can I outout to LaTeX the
second command :

udapy write.TextModeTrees color=1 < my.conllu | less -R

Yes, but without the colors:
echo '\begin{verbatim}' > my.tex
udapy write.TextModeTrees < my.conllu >> my.tex
echo '\end{verbatim}' >> my.tex
and then use
\input{my.tex}

It would not be difficult to write a subclass of write.TextModeTrees
which would use some LaTeX markup like \lemma{I}, \upos{PRON}
instead of the ANSI color codes. So then you could define the colors&style
\def\lemma#1{\textcolor{red}{#1}}
If you are interested, I can implement it.

what I really missing is a simple way to display a fragment of a sentence

Now, I've added a Udapi block which allows to delete all nodes in a document
except for the subtrees matching a given condition, e.g.

udapy -s util.Filter subtree='node.upos == "NOUN"' < in.conllu > filtered.conllu

will print only noun phrases.
So you can use

udapy util.Filter subtree='node.form == "dog"' write.TextModeTrees < in.conllu

to get the subtree(s) headed by word "dog", or

udapy util.Filter subtree='node.ord == 2 and node.root.address() == "3"' write.TextModeTrees < in.conllu

to get the subtree headed by the second word in tree with sent_id = 3.

Yet another alternative to Tikz, Html and TextModeTrees would be to
use paste the CoNLL-U to the online Brat rendered
(e.g. click "edit" here http://universaldependencies.org/sandbox.html#pirate-example).
But then you would need to zoom, take a screenshot and include it as bitmap (png) into LaTeX,
which is not optimal.

If needed I can implement write.Sdparse which would print something like

Dogs run
nsubj(run-2, Dogs-1)

which would allow easier manual editing than the CoNLL-U format.

[arademaker]

other lib that we can take ideas from:

https://yandex.github.io/dep_tregex/quickstart.html

[arademaker]

Yet another one

https://gitlab.com/nats/deptreeviz

and some possible ideas can also be taken from http://lisp-univ-etc.blogspot.com.br/2017/04/pretty-printing-trees.html.

[arademaker]

Commit af2dd6e closes this issue. More tests are welcome.