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<p>Hi,</p>
<p>I second Chris's proposal. Using graphviz python module [1], you
can generate your graph by iterating over the features.<br>
</p>
<p>At the end, just call the render and you will get the rendered
graph (just add view=True) within your QGIS environment. You need
to know some Python basic stuff, but not much than the basic.<br>
</p>
<p>Regards,</p>
<p>Jorge Gustavo<br>
</p>
<p>[1] <a class="moz-txt-link-freetext" href="https://graphviz.readthedocs.io/en/stable/manual.html">https://graphviz.readthedocs.io/en/stable/manual.html</a><br>
</p>
<div class="moz-cite-prefix">Às 18:55 de 09/02/21, chris hermansen
escreveu:<br>
</div>
<blockquote type="cite"
cite="mid:CACc2_6-H-oW5hWpzRJmz3A9OE0e+_hibMvB+p-jZYAKVsZmfHg@mail.gmail.com">
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
<div dir="ltr">
<div dir="ltr">Giacomo and list,<br>
</div>
<br>
<div class="gmail_quote">
<div dir="ltr" class="gmail_attr">On Tue, Feb 9, 2021 at 8:07
AM Giacomo Uguccioni <<a
href="mailto:giacomo.uguccioni@gmail.com"
moz-do-not-send="true">giacomo.uguccioni@gmail.com</a>>
wrote:<br>
</div>
<blockquote class="gmail_quote" style="margin:0px 0px 0px
0.8ex;border-left:1px solid
rgb(204,204,204);padding-left:1ex">
<div dir="ltr">Hello everyone, and thanks for the support.
<div>If this is not the place to ask for this kind of
thing, I ask you to give me a link where I could
find support.</div>
<div>I'm a qgis 3.14 user. I would like to represent a
tree diagram or functional diagram being able to draw
the symbology and position of nodes and connections from
the information contained in the attribute table.
Example: I would like to represent the medium voltage
grid of a city as an electrical diagram; I would like to
represent with lines that join at nodes the roads that
connect certain houses and schools in a city. So my goal
is to be able to build a layout with symbology of nodes
and connections derived from information contained in
different shapefiles or within features, with a
non-geographic but schematic / ideal criterion.</div>
<div>Do you have any ideas or suggestions on how to do it?
I thank you for every contribution.</div>
</div>
<br>
</blockquote>
<div><br>
</div>
<div>Not a QGIS-based solution, but I've used <a
href="https://graphviz.org/" moz-do-not-send="true">graphviz</a>
to generate graphs from the command line with considerable
success. It offers a small but useful programming language
that can be combined with data in text files in a really
useful way.<br clear="all">
</div>
</div>
<div><br>
-- <br>
<div dir="ltr" class="gmail_signature">
<div dir="ltr">Chris Hermansen · clhermansen "at" gmail
"dot" com<br>
<br>
C'est ma façon de parler.</div>
</div>
</div>
</div>
<br>
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