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Graphics and Visualization Wolfram Language Raspberry Pi

JavaGraphics not functional with Wolfram language on RPi

Posted 11 years ago

I would like to use JavaGraphics with the Wolfram language on RPi. This is the advertised way to use graphics with the kernel (<< JavaGraphics`). I t needs an x-server which I have working. From the root terminal, it loads the package (package is initialized but says first::first {} has length of zero} but crashes when I try to use it (java.lang.Null.PointerException). It is very clunky to have to export graphics to see them. Is this a bug or something not quite ready? Thanks

POSTED BY: david p

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Posted 11 years ago

Duplicated. I will ping developers about it.

POSTED BY: Bruce Miller

Posted 11 years ago

Wow, the NullPointerException turned out to be a one-line bug that dates back many years to the very beginning of J/Link, but had never been exercised until now. I have made a fixed JLink.jar file available for download at https://download.wolfram.com/?key=WANXSL (it will only stay up for a week). Replace the existing JLink.jar at <Mathematica dir>/SystemFiles/Links/JLink.

POSTED BY: Todd Gayley

Posted 11 years ago

Bruce and Todd- Thanks that did the trick! I never got a prompt and effective response like this before. I still get the first::first message and it takes some time to get started, After that it blits each plot in its own window (Out). I put the file in: /Opt/Wolfram/WolframEngine/10.0/SystemFiles/Links/JLink For setting up xwindows I use xdm as described here. http://www.straightrunning.com/XmingNotes/pixming.php

POSTED BY: david p

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