Juno - plot, viewmat, and other addons and packages

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Robert Herman

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May 8, 2026, 1:21:02 AMMay 8
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I just started playing with Juno. I love it! I usually use the jconsole or JQT. I have used JHS in the past, but Juno is great. I like making literate programs out of my little toy J programs with heavy commenting for my own memory.

What big addons or libs are not available in Juno vs. JQT?

I've tried plot, viewmat, and a few others, but they fail early and they are not found.


Marcin Żołek

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May 9, 2026, 7:18:38 AMMay 9
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Thanks for your feedback!

In Juno, you can visualize a noun (of rank 1 or 2) directly from the
left panel with a single click, without adding Viewmat or Plot to your
code. Better visualization is under construction, but the main goal is
to make experimenting convenient. Similarly, Dissect can be launched
simply by clicking a line number.

I've just added the list of addons available in Juno to its page on J
Wiki: https://code.jsoftware.com/wiki/Guides/Juno#Available_addons

In a default installation, all official addons should be available in
Jqt: https://code.jsoftware.com/wiki/Vocabulary/Libraries

Marcin
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Henry Rich

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May 9, 2026, 7:45:54 AMMay 9
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I think that in Windows with the AIO Installer, the user has to use
Pacman to bring in all the Addons.

Henry Rich

Jan-Pieter Jacobs

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May 9, 2026, 6:22:52 PMMay 9
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I've been using the J playground quite a bit for some personal scripts and found it really useful as it also has the plot addon and the ability to install non-binary addons from Github (e.g. math/calculus, or tables/csv). Maybe this could help you out if the addon you're looking for is missing in Juno?

The downside of the playground at the moment is that the J version is getting slightly dated (j903, v.s. j9.7 being current).

I wonder whether there are any plans to include these functionalities in Juno as well (or to update the J version in the playground)?

Best regards,
Jan-Pieter.


chris burke

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May 9, 2026, 6:58:57 PMMay 9
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I'm currently working on updating the playground to the latest J
version. It will take a few days.

Jan-Pieter Jacobs

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May 10, 2026, 5:50:16 PMMay 10
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Thanks Chris, that's great news. I'm looking forward to it.
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