graphviz image differs when ran through plain "dot" vs through pandocfilter-graphviz

[matthiasbeyer]

The image which showes up in my example differs from the one I get when running the exact same dot source through the dot-tool.

Why is that?

[jgm]

How does it differ?

+++ Matthias Beyer [Jan 14 16 14:10 ]:

The image which showes up in my example differs from the one I get when
running the exact same dot source through the dot-tool.

Why is that?

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References

1. #33

[matthiasbeyer]

Completely.

That's a screenshot from my paper:

Which is the example from the graphviz page:

The source of the image is here.

[matthiasbeyer]

I recompiled the source of the image with the plain dot program and it yielded the correct result, though when ran through pandoc it yields the upper image.

[jgm]

Note: these are just examples, meant for you to study
in making your own filters. So, take a look at the source.
You'll see it uses the pygraphviz library.
Documentation here:
http://pygraphviz.github.io/documentation/pygraphviz-1.3rc1/tutorial.html#graphs

And it's clear what's happening. By default, pygraphviz
uses 'neato' to layout the diagrams. You want 'dot'.
So you need to change the line

G.layout()

to

G.layout(prog='dot')

If you'd like to modify the filter, it would be worth making
it sensitive to a layout attribute.

``` graphviz layout=dot

or

``` graphviz layout=neato

[matthiasbeyer]

okay, this makes sense.

Now it tells me:

pandoc: Error in $[48][0][0]: expected Object, encountered Array

I can produce this error with your graphviz example as well...

[jgm]

It worked for me. What version of pandoc are you using
(and of pandoc-citeproc)?

+++ Matthias Beyer [Jan 15 16 14:33 ]:

okay, this makes sense.

Now it tells me:
pandoc: Error in $[48][0][0]: expected Object, encountered Array

I can produce this error with your graphviz example as well...

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References

1. #33 (comment)

[matthiasbeyer]

pandoc 1.15.2.1
pandoc-citeproc 0.8.1.3

[jgm]

The example filters in pandocfilters have been updated to
work with pandoc 1.16.x. You can search through git history
to see how to downgrade so they'll work with 1.15.x.

+++ Matthias Beyer [Jan 15 16 14:42 ]:

pandoc 1.15.2.1
pandoc-citeproc 0.8.1.3

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1. #33 (comment)

[matthiasbeyer]

Fixed that issie for me. Thanks a lot for your help!