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12:39 AM
@JM: do you know how the activity feed is enabled or added to a chat room?
 
1:22 AM
@robjohn you'll find it on the feeds tab on the room's page
or if you're inside a room already, click on room > manage feeds (you'll find this above the list of users online)
 
 
1 hour later…
2:35 AM
@yoda Thanks :-) I have added the math.SE feed to the math chat. I will see if it bothers anyone.
 
 
1 hour later…
3:43 AM
@rcollyer Sorry, that looks to be above my paygrade... :(
@robjohn Sorry, I was away. I see yoda fixed you up good...
 
4:00 AM
@JM Yeah, I have the feed set up on math.SE. We'll see how everyone feels about it.
 
4:22 AM
@JM well, I can't blame you. You are a chemist after all.
(it's after midnight here, my code isn't working, and sometimes I can't resist a little friendly insult. please forgive me, at least until I've had coffee, tomorrow.)
 
And we were worried that R.M.s traffic spikes wouldnt last. Check out the site's Area 51 page. Visits are above 1500, for now at least.
 
@Verbeia I think that is just the averaging kicking in. Hopefully, it'll last.
 
@rcollyer true, we will know more 14 days after R.M. got his badges. The run of new members and newbie questions is actually a good sign.
Anyway, gotta go
 
R.M
@Verbeia every little bit helps. I've posted a few to r/mathematica, but they have such a low volume of new posts that I don't want to be seen as spamming
I think a lot of the new users are from r/mathematica.
 
4:41 AM
@rcollyer :P No worries. Who knew a chemist could be halfway competent at numerics, even?
Interesting... there are two frequent visitors of this room that I haven't seen showing up simultaneously. ;)
 
 
3 hours later…
7:48 AM
Does anyone know if the FAQ suggests that people wait for a period of time before accepting responses, I read it a couple of times but didn't spot a relevant para?
 
I didn't notice.
But I don't have the Analytical badge.
 
Neither do I :)
 
 
2 hours later…
10:07 AM
0
Q: Code indentation not working after a list

AjasjaIndented code does not display properly after a list item. Is this a bug, or am I doing something wrong? (*some good code here*) f[x]=1 A list: one two three (some good code here) f[x]=1 After a normal paragraph, everything is OK. (*some good code here*) f[x]=1 (I'm using win7 and Chro...

 
10:49 AM
@acl: here it is if you want to see it. Note the caveats I mentioned in the post.
 
acl
@JM thanks
@JM wow, guess I should have looked it up in the literature! this is really neat, much better than my heavy-handed "approach"
thanks
 
@acl You still need to be careful in using it. No error control, and all that... :)
...and if your black-box function can only evaluate for real arguments, it won't be useful.
 
11:17 AM
Who can move a question to another forum?
0
Q: The Cayley Map SU(2) to SO(3)

steveni know it is a double map between SU(2) and SO(3) but i have no idea how i would go about proving this or showing this. can someone point me in the right direction please?

I think this is supposed to be in Mathematics
 
Done.
 
Thx
 
 
1 hour later…
12:33 PM
Wow, the new users have arrived. Does anyone know if the 30 questions/month individual limit, as on SO, also applies on Mma.se?
 
1:24 PM
26 questions during the pat 24 hours
I'm sorry, 27 new question!
What happened? Yet another 1-rep brand new user. Did the site get some extra advertising since yesterday?
 
1:47 PM
I didn't realize [this question] was the 3rd (4th?) rapid-fire by the same user when I answered. Also, I think it's worthwhile writing down how to use ImageResolution and ImageSize together (I tend to forget it myself..)
@Verbeia Maybe exam season is upon us ...
Am I too skeptical?
 
2:28 PM
@Szabolcs nope, not skeptical enough. I suspect we'll suffer from a semester based cycle of questions as academia is one of the principal locations of mma usage.
That said, maybe reddit has been good for us.
Sometimes I wish the voting wasn't anonymous. I keep getting votes on stuff I haven't touched in a while, and I'm a bit curious as to who voted.
 
3:07 PM
@JM I've noticed. The question of course is are we talking coincidence, a Clark Kent/Superman thing, or a Dr. Jekyll and Mr. Hyde situation? I'm voting for the latter. :)
 
@rcollyer I agree with your third assessment.
 
@JM BTW, from the chemists I've met, I'd have to agree with the sentiment of chemists not knowing numerics ... Although, it isn't entirely true.
Of course, the same thing can be said of experimental physicists.
Which includes chemists, of course, being the same field and all. =)
 
@rcollyer Well, there are a few exceptions. On the other hand: what're the odds of them studying it for giggles?
 
@JM low, very very low.
Truthfully, I have a lot of respect for experimentalists (of any stripe) as they are able to do things I can't and haven't bothered trying to learn.
(Of course, I respect my car mechanic for the same reason ... )
 
@rcollyer Wet work can be a bitch to do...
 
3:13 PM
@JM friends of mine talked about 10% yields in organic (the class) were considered good.
I don't envy you the job.
 
Yeah, 10% is something to be happy about. Quantitative yields are a miracle to be cherished.
 
Incidentally, over on sci-comp.se, Aarthi asked a self-assessment question. Any thoughts on whether or not we want to do something similar here?
@JM Of course, then you read about the fractional distillation miracles that oil refineries pull off.
It's like eating every part of the cow, including the hooves.
 
Hey, asphalt is useful... :) though the really volatile ones are burned off instead of being used.
That's why you'll sometimes see fiery plumes at the top of some of those refineries.
 
I lived in a refinery town for a while, so I know about the plumes.
 
Hmm, I don't know about picking questions... I suppose we could use RandomInteger[] and then get question numbers corresponding to the output.
 
3:20 PM
Sounds like a reasonable way to do it, but I think RandomChoice[] may be superior in that case.
Although, it does it with replacement, and clearly we want without replacement. ;)
 
3:35 PM
@rcollyer RandomSample[] then
 
@Heike I thought there was a function to do that. Mind you, I didn't look very hard for it ... :)
 
@rcollyer The first test question of the self-assessment test on sci-comp.se is actually quite useful to me.
 
@Heike I've never played with FEM, mostly it has been finite differences, so I agree with you there.
 
@rcollyer I'm more comfortable with finite differences than with finite elements. I've learned about FEM as an undergraduate but that was years ago and I'm sure things have progressed since then.
 
3:54 PM
@rcollyer mma will get one eventually... gardening had one in december.
I find it ridiculous... first they start 1 site (SO) and then a bunch more. Then hire a few people to do the evals on those sites and then when the number of sites gets too big, they outsource it to the community
 
@yoda Who doesn't like free labor? ;)
 
Heh, I don't know if SE has a plan for after the VC runs out
 
How long do you figure it'll take before they burn through all of it? >:)
 
4:15 PM
heh, they've already started culling sites (although for a different reason)
They finally realized that not everything can be molded to a programmer's vision of Q&A
 
@yoda How can you see which sites have been culled?
 
@Heike There are several differential equation integration and approximation methods that I'd like to learn. But, sometimes there is no time.
 
You'll see them spinning it, though: "try again next time! maybe things are better then..."
@Heike It was blogged about a few weeks ago...
 
@JM reminds me of something similar that happened in December ...
 
4:20 PM
@rcollyer Sometimes you have to decide if it's worth your time figuring out how the gears fit together inside your buzzsaw when you happen to have a fair amount of trees to cut...
 
@yoda I was just trying to see if we can pre-empt such an evaluation, and show our "pro-active" spirit.
 
@rcollyer and then we bitch slapped them
 
@JM or fingers ...
 
@yoda hard, too.
 
@rcollyer trust me, you're not going to win any brownie points.
 
4:21 PM
@yoda sorry, I don't know what you're talking about ... The sarcasm highlighter appears to be broken.
 
halirutaaaaan!
 
He's here? I don't see him in the right panel...
 
@yoda Oh, I read that post. I was wondering if there had been any other casualties since then.
 
@JM I think he was referring to the broken sarcasm highlighter, so we need to call in the "expert."
 
speaking of highlighters, Amro (matlab tag regular) created a highlighter for the matlab tag on SO, which is pretty neat
I was frustrated with the default over there
 
4:24 PM
@yoda Cool! On another note: you still think the likelihood of a matlab.SE is low?
 
<- seeks biologist to share parenting for a slime mould controlled robot
 
acl
@JM that's my attitude too
 
@image_doctor I didn't realize this was a dating site. Carbon dating, maybe.
 
@JM But if the saw breaks it's nice to know what the problem could be.
 
@JM very much. Also, it was proposed and Verbeia shut it down :P
 
4:26 PM
@rcollyer Carbon's so hard to date. It's all dark...
 
@JM diamonds aren't dark
 
@JM some people like that sort of thing.
 
@Heike Yes, true. I believe most scientists only bother to figure out numerics when routine X is not giving the numbers they want, anyway...
@Heike Yeah, but you don't see them often. Like good dates...
 
@JM I see those in the store all the time, but they have to be in season.
 
btw, @jm are you familiar with oop in matlab?
 
4:29 PM
@yoda Not really; I'm an old-school user and I haven't really found time to look into that.
 
@JM But a little pressure and your new squeeze is a gem
 
@JM They're usually out of my price range anyway.
 
@yoda unrelated, but what do you think about my comment to an answer on the gardening.SE here
 
@image_doctor Heh, "squeeze". :D
 
@image_doctor You probably need to heat things up a bit as well.
 
4:31 PM
@Heike I sense friction already :(
 
This is starting to turn into the nerdy version of the monty python nudge-nudge-wink-wink sketch
3
 
@Heike starting?
 
@Heike .. does she ?
 
@EliLansey might work for english ivy, but not sure for bamboo... those things grow fast!
 
@image_doctor Yes, she uses Clairol. I checked. ;)
 
4:34 PM
Black tarp is how I've been getting rid of weeds... tarp on for a month (sometimes more) and then move to a different spot
 
@yoda do you think it's worth a seperate question for the bamboo?
 
@yoda Oh, I can attest to bamboo growing fast. I used to raise shoots for food...
 
@yoda ok, i'll give it a shot. we want to plan a vegy garden, and the previous people who lived at our house cultivated all sorts of invasive species...
 
@yoda for mare's tail you would need to cover it for a bit more than a month
 
which we've been trying to get rid of
 
4:35 PM
@EliLansey yeah, sure. Say that you've seen that question and ask if the advice holds for bamboo too, especially given that it grows fast. You might end up pitching a tent otherwise ;)
 
@yoda lol, yeah. that stuff is rediculous
 
@JM that would explain the bounce back !
 
@yoda I thought we closed that topic.
 
did you see the mythbusters thing on it growing through a person?
@Heike Ha!
 
@Heike ha, it was actually a subtle reference! ;)
@EliLansey whatever you do, don't plant mint in the ground. Always in a pot
 
4:37 PM
@yoda I have a finely tuned double entendre radar.
@yoda been there, done that.
 
@yoda What sort of nut grows mint in the ground? :o
 
@JM uhh... me, before I found out? lol
 
I'm thinking of planting Jerusalem artichokes but I'm a bit worried about them spreading as well.
 
@yoda we grew it in a pot
 
4:39 PM
@Heike ah, but have you encountered the rare triple entendre?
 
@yoda Hah. You live, you learn... but seriously, herbs in pots. That's the rule I follow. :)
 
I cut down quite a bunch, added some vodka and let it soak for a month and lo! peppermint extract!
 
@yoda yuck!
 
@rcollyer That's just because you haven't tried it... :P
 
@rcollyer say that when you get your peppermint laced cappucinos at starbucks during winter
 
4:41 PM
@yoda i never get those, I'm not a fan of peppermint.
 
@yoda sounds a bit like how a friend of mine deals with marrows.
 
Although, I wasn't that extravagant back when I still had an herb garden. It was always tisanes...
 
@Heike ask!
 
Question: say I compile of function to c, how can I save it for later re-use?
Will Put be sufficient and not incur the compile overhead again?
 
ok, thanks @yoda
 
4:44 PM
@Heike actually, they seem pretty hardy and easy to propagate, but not invasive
 
@yoda Looks promising.
 
Opportunity for a reversal badge here ...
 
@rcollyer I was thinking the same thing
 
@rcollyer nope; there are two parts to that: the CompiledFunction object, which contains a LibraryFunction object, and the library itself on disk.
You need to recreate the CompiledFunction in the right form, call LibraryFunctionLoad on the library, then put that result in the right place (last position) of the CompiledFunction. LibraryFunction object doesn't look stateful, but it is--will not work without LibraryFunctionLoad first and substitution of the result for that originally in the CompiledFunction.
Okay, gotta go. Bye.
 
@OleksandrR Thanks.
See you all later.
 
4:54 PM
@rcollyer that looks like a candidate for deletion
What's up with all of that chap's questions?
 
@yoda yes it does. But, we need the close votes first, and then we can get on with the ritual burning of the question.
@yoda who knows.
 
SFAICT he hasn't even tried replying to comments...
 
Looks to me like he isn't even trying to read the docs.
any way. got to run.
 
@JM that's one level worse than a help vampire
maybe more than one
 
5:28 PM
@yoda You mean that this person sparkles as well?
 
@Heike oh dear...
PostQuestion[user, body, tags, title] /; ! TwilightFanQ[user]
 
Oh, that's where it's from? In which case, I don't mind being ignorant... ;P
 
5:47 PM
@JM Well, I didn't know either, but I attribute any unfamiliar references re: vampires to twilight and Google confirmed it
 
Hah. They have this new maxim nowadays: "hell hath no fury like a fangirl mocked."
 
@yoda I only know about sparkling vampires via various internet memes.
 
Sure, they sparkle. But can they moonwalk? ;)
 
@yoda I've seen that one before. Have you seen this one?
 
6:04 PM
@Heike I hadn't seen that, but I did notice most of the changes (except the table cloth)... it was a little too drastic of a change, I think...
Why does that name ring a bell?
Xmen?
 
According to wikipedia there is an actor called john stamos who played in full house.
 
@Heike he was also a drummer for The Beach Boys in the 90's.
 
@yoda It was his ex-wife who was in X-Men... if memory serves.
 
@JM ah, yes. Rebecca Romijn-Stamos
 
6:28 PM
@yoda just for you:
And he was driving a Toyota, get it? A toy yoda!
 
6:41 PM
 
6:59 PM
@JM I know bad pun. There was a case here in the states where a waitress at Hooter's sued them for giving her a new toy yoda for winning a contest when it was implied that it was going to be a new Toyota. She won the case.
Hmmm ... my kernel hit ~5GB of ram. Well, I guess that calculation is not going to happen any time soon.
 
@rcollyer it was an april fool's prank too!
 
@yoda where, at Hooter's?
I'm not sure what to make of this:
In particular, the phrase "ultra smooth magnetic gravity system" is bothersome.
Of course, the same company ships a 1 W blue laser pointer.
 
@yoda Ah, same case.
 
@rcollyer According to the section "How it works":
Inside the diffuser tube, there is a metal sphere which is suspended permanently inside. This sphere's movement caused by gravity creates the beam grow effects. There is a magnet hidden in the tip of the blade, which causes the ball to magnetically lock in place. The magnetic lock can be disengaged by bumping the S3 laser with sufficient force.
 
7:14 PM
I didn't read that far. Worth $99, though?
 
@rcollyer The 750mW S3 Krypton version is $1069.90
You can probably beat superman with that one.
 
:)
The Arctic (the blue one) only shows up as the 1W variant, and that is for $300 + $100 for the saber.
Okay, last link for today:
 
@rcollyer I'll see your beer-truck-house and raise you a wine barrel hotel
 
@Heike I had forgotten about that. The beds are a little small, though. :)
Got to run. Talk to you later.
 
7:29 PM
Bye
 
7:49 PM
@rcollyer that looks like a pleasant place to spend the weekend
 
@image_doctor It does, doesn't it? I'm wondering where the bathroom is, though.
 
@rcollyer Perhaps it is located in !wagon
 
This answer is awesome:
10
A: Question about collections of custom GUI controls for Mathematica

Vitaliy KaurovOne of the excellent places to look is the Wolfram Demonstration Project. There are many cases with custom controls there. You can test out controls immediately and download the source code. Because I know that site pretty well I will keep the list here. Relief-Shaded Elevation Map 3D Waves ...

I love the custom controls, now if I just had a use for them in general.
 
8:06 PM
@rcollyer I was just reading that one
 
 
3 hours later…
10:40 PM
@yoda actually the Matlab proposal is still there but the number of followers flatlined a few weeks ago. I've actually upvoted some of the example questions, but philosophically I don't see how Matlab can make the case for a separate site given SO is working for it.
There are so many unthinking proposals for particular programs and frameworks. Most of the languish, but I have made a bit of a name for myself point out to people why ytheir proposal isn't the next AskUbuntu.
 
@Verbeia Oh, I agree that SO is working, but I found the additional arguments that majority of the questions are on SO and the spread on other sites is small, etc. to be very close to what others said for mma.se... At that point we didn't want to setup a filter across all sites :)
 

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