[yt-users] Plot 2D magnetic field lines

[Matthew Turk]

On Mon, May 4, 2015 at 2:01 PM, Nathan Goldbaum <nathan12343 at gmail.com> wrote:
>
>
> On Mon, May 4, 2015 at 11:43 AM, Stella Offner <offner at gmail.com> wrote:
>>
>> Hi,
>>
>> Is there a way to do annotate streamlines and use get_multi_plot with yt
>> 3.1? The single-plot example below works for me, but it doesn't work with
>> this example of get_multi_plot (i.e. annotations are not carried over):
>>
>> http://yt-project.org/docs/3.1/cookbook/complex_plots.html#multipanel-with-axes-labels
>
>
> Hi Stella,
>
> With a bit of fiddling, I was able to get this to work in the latest
> development version of yt, although I think it should work in 3.1 as well,
> see:
>
> http://paste.yt-project.org/show/5532/
>
> This is a bit tricky, since it depends sensitively on details of how
> matplotlib stores imshow plots and that way we interface with that in the
> streamline callback.
>
> It might be worthwhile to add a new cookbook script using this example -
> we'd be very grateful for any docs improvements you might want to make!
>
>
>>
>>
>> Sorry if this was already answered in the mailing list archive somewhere,
>> the user discussion archives is still unsearchable:
>>
>> Forbidden
>>
>> You don't have permission to access /pipermail/yt-users-spacepope.org/ on
>> this server.
>>
>> Additionally, a 404 Not Found error was encountered while trying to use an
>> ErrorDocument to handle the request.
>
>
> This has come up a few times before although the lack of mailing list
> archives might make that hard to discover! It's an issue with our ISP. Matt
> has been sending them angry e-mails for a while now....

I got an email today saying it was resolved, and should be back online today.

>
>
> -Nathan
>
>>
>> Thanks!
>> Stella
>>
>> On Tue, Apr 28, 2015 at 9:05 AM, David Collins <dcollins4096 at gmail.com>
>> wrote:
>>>
>>> Hi, Dominik--
>>>
>>> What was the yt command you used to make the streamlines and generate the
>>> error you sent?  I used the following and it was successful:
>>> >>> ds = yt.load('DD0004/data0004')
>>> >>> proj = yt.ProjectionPlot(ds,2,'density')
>>> >>> proj.annotate_streamlines('Bx','By')
>>>
>>> and it made this image:
>>> http://imgur.com/eZQmqTB
>>> Can you try the above and let me know if it works?
>>>
>>> d.
>>>
>>>
>>> On Tue, Apr 28, 2015 at 2:58 AM, Dominik Derigs <derigs at ph1.uni-koeln.de>
>>> wrote:
>>>>
>>>> Hi together,
>>>>
>>>> I want to use yt for plotting magnetic field lines in FLASH simulations
>>>> from 2D simulations and slices from 3D simulations.
>>>> An example of what it could look like can be seen here:
>>>> http://aprg.mae.ufl.edu/wp-content/uploads/2014/07/tang_51.png
>>>>
>>>> I tried to use yt's streamline function, but this does not work for me:
>>>> http://yt-project.org/doc/visualizing/streamlines.html
>>>>
>>>> The error shown is:
>>>> ValueError: operands could not be broadcast together with shapes (9,9,2)
>>>> (9,9,95) (9,9,2)
>>>>
>>>> The used FLASH file is attached.
>>>>
>>>> Thanks a lot
>>>>
>>>> Dominik
>>>>
>>>> --
>>>> Dominik Derigs
>>>> I. Physikalisches Institut
>>>> Universität zu Köln
>>>> Zülpicher Straße 77
>>>> 50937 Köln
>>>> GERMANY
>>>>
>>>> Tel. (+49|0) 221 470-8352
>>>> Fax. (+49|0) 221 470-5162
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>>>
>>>
>>> --
>>> -- Sent from a computer.
>>>
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