@Öskå There's another cluster elsewhere which does, so people who use openMPI use that. That leaves more power for the rest of us, which is nice. And it seems most who do heavy calculations do use MPI, so I can use as many cores as I want, which is also nice!

@acl Lucky you :D I've been traumatized by openMPI during my scholarship, so no more!

@Öskå I vaguely remember trying to get it to work at some point. I don't remember why I gave up

did you actually use it? for what, if you don't mind?

@acl Only for learning purposes, learning about threads and multi threading and all.., no real applications I'm afraid

@Öskå I see, well that's more or less what I tried too. Decided I'd only do it if I really had to. I think I did use some code using openMPI eventually, but not written by myself

too complicated, I already have trouble understanding the physical problems I'm working on. Adding programming complexity confuses me (which isn't hard though)

Too complicated indeed, but hey, one day maybe I will learn how to use it properly :D

@Öskå probably if you have to

I hope I will never have to :P

But it's time to sleep!

@Öskå no sleep for the wicked, I'm afraid...

night!

Nice pictures BTW, some really cool ones :)

@Öskå thanks, nowadays I don't take so many (less time, also my commute to work is less spectacular)

I don't have a keyboard and mouse. Can I just use my laptop's keyboard and mouse to set up NOOBS on my raspberry pi?

@seismatica I also didn't have a keyboard, mouse or screen. I didn't manage to get NOOBS working. NOOBS won't auto-acquire an IP address and have ssh set up by default, but Raspbian will. So you can put Raspbian on your SD card (google how), then figure out the IP address of the Pi somehow and just connect with ssh.

Username is pi, password is raspberry.

@Szabolcs does a Raspbian installation the same as a NOOBS installation? Will I get MMA from that? Would you mind sharing any link about installing Raspbian on the Raspberry using a laptop's keyboard and mouse? I don't want to follow the wrong method and get stuck. I might also bite the bullet and buy a screen for the Raspberry: what do you think about this LCD screen: amazon.com/Digital-Reversing-Satellite-Receiver-Equipment/dp/…?

Does anyone understand how Rotate[g, theta, w, p] works? For example:

Graphics3D[
 Rotate[Cuboid[], -90 Degree, {1, 0, 0}, {1, 1, 0}],
 Axes -> True, AxesLabel -> {"X", "Y", "Z"},
 ViewPoint -> {1.3`, -2.4`, 2.`},
 Lighting -> "Neutral"
 ]

I expected it to rotate around the red line...

@Pickett Why? According to the docs, shouldn't it rotate the cube about the axis passing through the line connecting $(1,1,0)$ and $(2,1,0)$?

Which is what it actually does?

So, like you take the cube in your first picture and push it over backwards (towards the infinite y direction) until it topples. Once it topples it looks like your second plot

Or am I missing something? I never used these functions

@acl That's not how I read the docs but you are right, that seems to be how it works. Thanks.

@seismatica I followed the instructions here: raspberrypi.org/downloads

I think NOOBS includes several OS and lets you select which one you want to use. But you need a screen/keyboard to do that. Or you can just install a Raspbian image on the SD card and it comes with ssh already set up.

Mathematica is included with Raspbian.

There seems to be a curious bug here:

The curious thing is that a definition on a parallel kernel affects evaluation on the main kernel, even though the definition is cleared from the main kernel and the evaluation is not parallelized.

Is there a way to programmatically get a list of modules loaded by MMA (9 in my case) by default? I.e., the list should NOT include the list of modules that I have placed within init.m. If this is a complicated question, I'm happy to type up a question about it.