Wolfram Mathematica - 2012-05-15 (page 1 of 2)

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12:22 AM

@acl I think the SE environment has a serial upvoter robot, just to keep users interested

@belisarius hope so, I'm only in it for the votes

@acl Of course we are all here saving our life from isolation and depression by receiving anonymous upvoting

@belisarius precisely

(better than fighting with anonymous referees who invent and then pick arbitrary nits with your papers, though)

Is there a way to create an image file of a cell without exporting the whole notebook as html?

@MichaelWijaya you can use Szabolc's image-uploading palette here:

39

Q: Can I easily post images to this site directly from Mathematica? (Yes!)

Graphics are tightly integrated into the Mathematica interface. The Front End is programmable, and Mathematica has functions to interface with the web, so the question naturally comes up: Could we make it possible to upload images to StackExchange directly from Mathematica, using a palette butt...

support faq site-tools

select a cell (by clicking on the bracket at the right edge) and then upload it. it uploads an image

(and puts a link to it in your clipboard)

if you do not want to upload it, I guess you could modify the code to save it somewhere

12:35 AM

@acl You anticipated my next question.

@acl I will look at the code and modify it accordingly. Thanks.

@MichaelWijaya Just select the cell, and select Save Selection As from the File menu. (Corrected)

@rcollyer ah yes, "Save Selecion As..." under File does the job

@belisarius or just avoiding work that we know we have to do ...

@rcollyer @acl "Save Selection As" works wonderfully. Thanks again.

@JM incidentally, the reason I keep flogging that question is the vain hope that one day someone will have a clue.

@MichaelWijaya Not a problem.

12:39 AM

@rcollyer I think the problem is that even if one does have a clue, it takes calculation to answer. most people won't sit down and spend a day or so on it

@acl true, very true. Does Leonid work with group theory, at all? :)

I think this is why most Q&A sites or discussion groups on maths or theoretical physics quickly derail (in my opinion anyway); most interesting questions can't be answered quickly enough, so they don't get answered

and my calculations are giving contradictory results ...

@rcollyer done in different ways? how?

Not sure what you're asking for.

12:42 AM

I mean, a) you know how to calculate it, do so in two nominally equivalent ways and get two answers, or b) you are not sure how to do it, think either way 1 or way 2 are correct, but give different answers?

b. I've made attempts at calculating it, but my results don't seem to make sense. At least to me, they don't.

Man, good thing I remembered to check the docs...

@rcollyer right. I wish I could help, but I don't use group theory in my daily work so am not confident I could get an answer in a reasonable amount of time.

In other words, they seem to contradict what I think they should give. It may be my assumptions are wrong, though.

@JM for which question?

@rcollyer the recent PDE one

12:46 AM

@JM very good answer!

@JM ah, yes, I had forgotten about the NDSolve framework. It would be worth emulating elsewhere in mma.

(I use StateData more for ODEs myself, so I'm not that used to using it for PDEs, but the docs seem to indicate that it's possible, and they use the sine-Gordon equation as an example...)

@rcollyer NIntegrate[] and NMinimize[]/FindMinimum[] are on my personal wishlist...

I probably need to read up on all the NDSolve docs one of these days...

@JM I'd definitely include those. Plotting functions (all of them) are on mine.

Got to run.

@acl If you're doing ODEs/DDEs, a good plan would be to curl up with Hairer/Norsett/Wanner along with the docs. For BVPs, DAEs, and PDEs, I'm not too sure what's the nice book for them...

...but there's a nice bibliography at the end of the docs.

12:51 AM

@JM yes I keep meaning to, but...

...lots of things to do. :)

I know, I know.

@JM in particular, if I am in "working" mode, I'll concentrate on physical problems and minimise the effort to learn new maths. if in "play" mode, I'd rather play with something like wavelets (as we discussed before)

And you're picky, too. :)

I even printed the Advanced Numerical Equation Solving docs (a couple of hundred pages I think). I skim through them once in a while but...

Numerics is wide. Like I said before, you need to decide if you can devote time to seeing why they used component blah in your chainsaw when you've a forest to cut down...

12:57 AM

@JM that I've decided years ago: I don't care (I do, but only in the same way I care about how my computer works; as a diversion. no time to delve deeper)

not everything that can be found out has to be found out!

@acl Which is fine. :) Sometimes, it's better for you to just ask a mechanic instead of mucking around, if you have other stuff you need to do.

1:10 AM

@belisarius @belisarius sorry, was copying from mma, seems like it went with [Pi instead of [Pi]

@tkott I think \[ got interpreted as a HTML escape when you pasted it as non-code

see: [] (I typed \[])

@RM likely. to get it to show double the \ for \[]

@tkott Yes, Heike or Verbeia clarified that

or use a code block

@RM yep

@RM Area51 has us below 1500, again. Any candidates for shameless promotion?

1:22 AM

@rcollyer you can try re-milking the ones that I've already milked ;)

@RM wouldn't that result in something swelling?

@RM true, or post the ones I've posted in r/programmers instead.

@belisarius yeah, us girls are interchangeable :-D

@rcollyer nminimize one might not fly... but you're welcome to try

@RM you mean NMinimize?

1:24 AM

@rcollyer isn't that what I said? ;)

Yeah, not everybody is interested in seeing a simplex tumble around in space... :P

@Verbeia I would have said: I've always thought that way. But, I never had, and my wife would kill me. :)

@Verbeia Well, I didn't know that both of you are girls ... but it seems something in my mind rang the bell :)

@RM :P

@belisarius no, that was Quasimodo...

1:25 AM

@JM well that's to bad for them, isn't it?!?

@rcollyer Reminds me of the joke: A: "What should I have inscribed on the inside of your husband's ring?" B: "Put it back on!"

@JM that's funny.

@RM Sometimes I feel like if Quasimodo IS in my mind

@RM Personally, I was thinking maybe István's one about pattern merging, as it may get an answer ... But, then I realized that reddit is a good representation of the internet and without an answer, it would get eaten alive.

@rcollyer if you're sharing on reddit to get an answer, then you're looking in the wrong place... :)

1:30 AM

@RM as I said, it would be like skinny dipping in a tank full of hungry piranha.

What fool idea is this to treat reddit as an oracle? :P

@rcollyer mathematica.stackexchange.com/q/5152/8 - I know mine is the accepted answer, but I think it does have enough "cool" factor.

@JM Only using it for additional exposure.

@Verbeia I think either him or szabolcs already shared it (only on r/mathematica though..)

@RM I didn't.

1:31 AM

@rcollyer The Internet nowadays is like the world. Almost every thought deeper than a fish pond condemn you to sarcasm and mockery :)

@RM And it doesn't show in a search.

@belisarius I don't mind sarcasm, its the mockery I have issues with.

@belisarius You're too generous. I'd change "fish pond" to "puddle"...

@JM Probably I would too. If I only know what a puddle is

@rcollyer #6 on the page... also, the search being broken is legendary :)

@JM I still think that's to deep for most people. We need to bring out the thin films theory to describe this.

1:34 AM

"the search being broken is legendary" - Oh Google, how can we ever navigate the wild, wild Web without you? :D

@RM well that will teach me to read.

@RM I even upvoted it previously.

@belisarius I was going to say that Google gave me "charco" as a good fit... but the awesome reverse translate gave both "pool" and "puddle" as possible meanings. I...

Odd question:

3

Q: Are questions of convergence important in real life?

In the real world, do we ever need to worry about convergence and what not? I am not talking about whether recursive functions and such terminate, but convergence in analysis. It seems like the finitude of the universe makes questions like that meaningless. I ask because it often seems like physi...

convergence math-history applications

@rcollyer Once upon a time at uni I had to deposit a gold thin film on some substrate and it ended up being black. My professor found that very interesting and made us learn a whole theory 'bout anomalous crystals. VERY cumbersome

@RM "Charco" sounds reasonable

@rcollyer You know how physicists frequently (ab)use divergent series... ;)

1:38 AM

@belisarius my one and only experience depositing thin films taught all of us why having a group of only theorists work together in the lab class is a bad, bad idea. I ran the screwdriver along the film we just deposited, necessitating the need to do it over.

"I ran the screwdriver along the film" - T_T

@JM true, but it seems a fundamental notion: does our numerical approximation actually work?

@JM it is amazing how it no longer conducted electricity.

@rcollyer Ha! we did the same mistake. But it was VERY fun

@belisarius which: destroying the film, or having a group of theory students work together?

@rcollyer Lot of anecdotes to tell later

1:40 AM

You're not supposed to run even a pin across it... :o

I was aware of it before I did, but the screwdriver slipped ...

what was a screwdriver doing there?

@rcollyer I did all my laboratory courses with this guy

amazon.com/…

@RM attaching the glass slide to the leads.

@rcollyer We were both theo

1:41 AM

@belisarius lab courses with a theorist? Sounds very dangerous.

@rcollyer Butterfingers, then...

@JM yes. it made the prof a little angry.

@rcollyer He wasn't my teacher, he was my mate

Was it Pauli who made equipment malfunction just by being around them?

@JM Note, I can rebuild a computer without any assistance whatsoever ...

1:42 AM

@JM Yep. The Pauli's effect

@belisarius figured that out after my post.

@JM I hadn't heard of that. Funny.

@rcollyer We are both short sighted. Trying to see Newton rings with a microscope we broke the lens, the plate and the objective

@belisarius um, that's expensive.

I'm not that bad. I think.

@rcollyer also "I hope", maybe? ;)

@JM Yes, that was implicit.

1:45 AM

@rcollyer We decided to simulate all experiments, since we were unable to get measurements. And that was before the PC era. Reverse engineering an experiment to simulate a realistic set of results was a nice theoretical exercise.

@JM The bad thing: I'm the person who puts all of the stuff together in my house, all of it.

@belisarius That is actually really cool.

@belisarius "simulate all experiments" - I'm torn between "impressed" and "horrified"...

we had one of this

The TI-59 was an early programmable calculator, manufactured by Texas Instruments from 1977. It was the successor to the TI SR-52, quadrupling the number of "program steps" of storage, and adding "ROM Program Modules" (an insertable ROM chip, capable of holding 5000 program steps) and a magnetic card reader for external storage. It was one of the first LED calculators with the capability and flexibility to take on many real-world calculation challenges, and quickly became popular with professionals in many fields. The TI-58, and later TI-58C, were low-end versions of the TI-59, lackin...

@JM Nah, I'm firmly in the impressed camp.

@rcollyer Clearly your mechanical skill wears off outside your house... ;)

1:47 AM

and that was it

@belisarius now, I'm somewhat horrified.

@JM But we were VERY amused

@JM except for that whole computer thing, yes, you are correct.

@rcollyer We mastered the Chi^2 distribution like no one else

@JM I've had some of "We can't do the experiments now, but assume we did, and that these are the values. Proceed to..."

1:49 AM

@belisarius I would hope so. What did the prof think?

@rcollyer They never knew. That was our pride

@belisarius Seriously?!? I'm definitely in the impressed camp now. With only a calculator. wow.

@rcollyer That gave me enough training to start working in the TI industry right away

@belisarius My grad lab prof insisted on 1. teaching us about file extensions and what the mean (you know: .exe, .doc, etc.), and 2. that we were to use matlab, and only matlab. We walked out that day ...

@belisarius nice!

"How to fake data without really trying" sounds like a useful handbook...

1:53 AM

@rcollyer A physicist don't need any training to start programming. That guy was pretty fool

@JM sounds like some of the stories I've heard coming out of Ph.D. defenses ...

@belisarius we thought so, and let him know it, too. (This was the whole spectrogram code from a while back.)

@JM we wrote the experiment results and the paper before actually setting up the damned thing

@belisarius yep, definitely a Ph.D. defense. :)

@rcollyer He deserved it

@JM the case studies in ethics courses are a good read too. Funny what the pressures of funding can do...

1:55 AM

@rcollyer We were undergrads. But always looking for fun :D

"Holy shit, the correlation coefficient has nine 9's!!!1!"

@belisarius He looks like a garden gnome, and has gained the nickname in the dept of the roaming gnome.

@JM That was a very interesting point ... How good our results should look?

@rcollyer The looks, or the height too?

@belisarius pages.cs.wisc.edu/~kovar/hall.html

1:57 AM

@belisarius we could never be accused of cooking ours: once, we got an increasing radiation level with increasing lead thickness

@JM the looks, and he's not very tall (about 5 feet, maybe 5 feet 4 inches).

@belisarius Right. Sometimes, you have flukes like the CMBE where the fit is just too damn good...

@acl Was it radioactive lead?

@acl how?

@belisarius didn't occur to us to claim this...

@rcollyer we screwed up, who knows how and where!

1:59 AM

@acl You should :D

@acl Maybe your lead was actually half-decayed pitchblende... :D

@acl I understand that. In undergrad, I had error bars that exceeded the actual value by an order of magnitude.

@rcollyer yes, that too

"Wow, look at all those error bars! Now, where are the data points?"

@acl it wasn't until I had to teach it, that I could actual perform error propagation.

2:00 AM

@rcollyer "Going into physics was the biggest mistake of my life. I should've declared CS. I still wouldn't have any women, but at least I'd be rolling in cash." Haaaaaaa

3

luckily in my last year I convinced the director of undergrad studies to allow me to take extra theoretical courses instead of experiments

user image

I have to leave now, but I promise writing down a few anecdotes of our experimental faking next time. There were a few really fun "gedanken" experiments

That's bonafide data from some fixed spin moment calculations I did. Anyone see the dip at 4 $\mu_\text{B}$?

@belisarius I still laugh at it. Night.

@rcollyer Were you drunk?

night all!

2:03 AM

@belisarius nope.

I should go too. Night all.

@rcollyer Maybe somebody kicked the machine when you weren't looking...

@rcollyer That seems my Millikan experiment results.

Ha!

@JM nope, DFT results. The error bars are generated by looking at the convergence with respect to the number of functions used.

Oh, right.. that DFT.

I always forget when you're around...

In that case: gremlins.

2:05 AM

@rcollyer I thought the error bars size were the larger available in yor graphing software

@RM I distinctly recall one of the first meta threads I made in scicomp.SE ... :)

@JM :) I remember that one. I caused a lot of problems with that.

bye all

Night.

Please note on the graph, that the range of energies is quite small, and error bars are on the order of 4 mRy which is quite reasonable.

Ry - rydbergs?

2:08 AM

Yes.

Better than Hartrees.

Anyway, I have a Fermi surface that I have to teach Mathematica to plot. So, good night all.

2:54 AM

To anyone interested: I added a modification of my inkblot routine for bilateral symmetry...

2 hours later…

4:47 AM

reddit.com/r/IAmA/comments/tmutz/…

3 hours later…

7:56 AM

Here's a quiz:

Suppose we want to expand an expression in terms of NonCommutativeMultiply, i.e. go from a ** (b + c) to a ** b + a ** c. The NCAlgebra package has NCExpand for this.

My suggestion for an implementation was: expr //. e_NonCommutativeMultiply :> Distribute[e]

NCAlgebra's way of doing it is: `expr //. NonCommutativeMultiply[a___, b_Plus,
c___] :> (NonCommutativeMultiply[a, #, c] & /@ b)`

Find the problem with my version. When does it fail? ;-)

2 hours later…

9:46 AM

@Szabolcs It goes wrong (or at least gives a different result) for something like a ** f[b ** (b +c ) ]

2 hours later…

11:45 AM

Quick question for you guys: is it possible to figure out your public IP address from within Mathematica? (Something like this service...)

12:02 PM

This may be the first time I wrote a blog post based on a mathematica.SE answer...

12:27 PM

Oh well, I figured out the answer for my first question: Import["http://icanhazip.com/"]

12:41 PM

@JM This is easier to remember (if you're a linux user): Import["http://www.ifconfig.me/ip"]

oh the other hand, lolcats are universal...

@RM That looks a bit more dignified, thanks!

@Heike Yep. I didn't realize that myself before it was pointed out to me.

@JM It also has a few other options... like /host or /ua... A call without the /ip will give you the list

Thanks, I'll read through that site's docs...

So my employers have now decided to replace our old graphing software with Mathematica. They will be putting out a tender soon for someone to build a GUI so non-power-users can use Player Pro. I'm now in the process of going through the literally 100 sample edge-case charts to make sure everything is possible.

2

12:55 PM

If they have strict requirements for figure formatting, that might be a pain ...

@Szabolcs I already have it working, but there are some small details I have to fix.

this one is fine already, for example

user image

I just finished implementing this one:

user image

(look carefully at the date labels)

Is that pure Mathematica, including the curve labels (US$, etc.) and the inset plot?

@Szabolcs yes

What about the figure caption in the first one?

The curve labels are just Epilogs

I have written a pile of custom functions to simplify it all

12:59 PM

@Szabolcs you seem surprised?

@RM I know it's possible, but I think it's a lot of work.

@Szabolcs It has been. Now you know the motivation behind some of my questions on the site :)

I couldn't talk about it until now, but the decision has been made, it is a matter of getting the paperwork in order.

By the way, the data in that "Net Public Debt" graph is fake. The real data looks a lot scarier in the lines section.

I'm always get a bit worried when I'm asked to fix figure formatting details ... it can easily turn into a nightmare when having to deal with things like ImagePadding, subfigures, etc. ... and I still didn't learn LevelScheme ...

@Verbeia What about the three coloured dots in the last figure?

I had implemented the simple types (one panel, no insets etc) over a year ago. When they exhausted the search for alternative packages, I was able to demonstrate a code-based solution to the decision makers. They want a GUI, which is beyond my capabilities (and time!) but others are likely to do that.

@Szabolcs Just three series with Nulls and a number, and Joined -> False

UndatedLineGraph[fakedata001,
 PlotStyle -> {Darker@Blue, Magenta, Green},
 Joined -> {True, True, True, False , False, False}, Axes -> None,
 LeftScale -> {20, 100, 20}, Title -> "Net Public Debt",
 Subtitle -> "Per cent of GDP",
 xTicks -> {"", "2004", "", "2006", "", "2008", "", "2010", "2014"},
 Sourcenotes -> {"IMF"},
 Epilog -> {Style[Text["US" , {2, 66}], Darker@Blue],
   Style[Text["Euro area" , {3.5, 43}], Magenta],
   Style[Text["UK" , {5.5, 46}], Green]}]

@Verbeia Wolfram coming down sure did have an impact, huh?

@Verbeia select the whole thing and click "fixed font" (no need backticks)

1:04 PM

@Verbeia I was wondering about that.

@RM Not directly - the decision was made a few weeks ago, but I'm now allowed to talk about it.

@RM thanks!

@Heike I'm doing this at home and it's a nuisance (and legally problematic) to bring the real data home to work on.

@Verbeia I was wondering about that...

@Heike ha

@Verbeia I was just surprised that the investments in for example the U.S. health care system or the bail out of the banks in the UK hardly showed up at all.

@Heike I just couldn't be bothered faking the data more accurately. Here is the real graph

user image

That is pretty scary.

1:13 PM

@RM Good title for something to be repurposed as 'canonical' question :-)

:)

@Szabolcs On the other hand, we should not have to rewrite chapter 1 of almost every numerics textbook...

@Szabolcs That reminds me, is there a way to truncate floating numbers in an InputField?

@Heike There was a question on that, looking for it ...

5

Q: Rounding problems inside InputField

Consider the following InputField InputField[Dynamic[h2, If[# === Null, h2 = h2, h2 = Round[#, 0.001]] &], Number] The purpose of the second argument of Dynamic is to avoid someone entering a value with more than 3 decimal places (or emptying the field after some value has been assigned)...

dynamic inputfield

@Szabolcs Thanks.

1:24 PM

@Szabolcs it's a great title but it seems to me the actual problem was something else (see my answer there)

@JM I think there was a question that could be made into a canonical one here, but can't find it

1:59 PM

goodnight!

Goodnight!

2:34 PM

@JM on a unix variant: Import["!ifconfig", "Text"] gives the full info on your current internet config

@JM although the output seems like a good candidate for creating a custom import filter ...

2:50 PM

@rcollyer Hmm, I forgot Import[] can do pipes...

...though in my case, that won't reveal my public IP.

Writing cover letters sucks

@Heike Everybody knows it's a formality, but we do them anyway...

@JM and if you don't do them, or their incorrect in some fashion, you lose.

@JM behind a firewall?

@rcollyer A system of routers, actually... :)

@JM I know, but I'm just really bad at selling myself

3:02 PM

@JM aren't routers supposed to just pass the info along?

unless they're doing NAT.

@Heike best of luck.

@rcollyer Thanks

@Heike I hate writing cover letters, too. :P

@rcollyer I can only see the IP address of my ethernet card with Import["!ifconfig", "Text"]

@rcollyer I haven't done a detailed look into how the guy I'm mooching an Internet connection off of has set things up, but I think NAT is up, yes.

@Heike Well, good luck anyway. :)

@JM that would explain why you can't get your public IP from ifconfig.

3:05 PM

@rcollyer I think everyone does. Except a friend of mine who thinks they're easy to write.

@Heike which is what it is supposed to do.

@JM Thanks

@rcollyer Who doesn't hate writing cover letters? And grant applications too, while we're at it...

@Heike I think the general consensus is that person needs professional help, or they should offer it!

@Heike Silver tongue? :)

3:07 PM

@JM the last one I wrote (which I didn't get) had to fit into 2 pages (not including references). Two pages is not a lot of space. The reference list, though, was at least 3!

@rcollyer I'm using NAT so that's not much use if I want to know my external IP address.

@Heike right. So, Import["http://www.ifconfig.me/ip"] for you, then.

@rcollyer His opinion is that as long as you can remotely defend the stuff you write in a cover letter you're ok.

@Heike reasonable. doesn't make it any easier to write.

But he seems to switch jobs every 3 years just for the fun of it, so maybe you're right and he is crazy

3:09 PM

Anyway: I asked the public IP thing in relation to the random.org random number generator I was talking about earlier...

@Heike He has a charmed life...

He does. He's the most optimistic person I know.

I'm not sure what to make of this function: SplitBy it doesn't seem like it does much different then what Split already does, except for the second syntax. Thoughts?

@rcollyer It's analogous to SortBy. Can save a few keystrokes. It may also be more efficient (I don't know about the implementation, but theoretically it could be)

SplitBy[list, f] is the same as Split[list, f[#1] === f[#2]&], I think.

But, doesn't the second form of Split do the same thing?

@Szabolcs Actually, I think you're right. Seems a little more useful now.

It's like saying "what's the use of Most[] when there's Drop[(* stuff *), -1]?"

3:21 PM

I just didn't see its utility, and was curious if someone else did. I stand corrected.

The reason I said SortBy could be more efficient is that it reduces the number of required evaluations: with SortBy[list, f], each element of the list can be transformed with f once, and after that a fast optimized internal comparison function can be used. When using Sort with a custom comparison function, simply having a custom comparison (instead of an internal one) might slow things down, and f will need to be evaluated twice for each comparison.

This wouldn't apply in the same way to SplitBy though ...

I like to have MinBy and MaxBy as well.

@Szabolcs Or the Ranked*[] versions...

Hello @GraceNote. What brings you here?

I've come here to grab a Mathematica mod to go on a glorious journey of righteousness and justice!

@GraceNote How may I serve?

3:24 PM

@Szabolcs Actually it seems a lot like a variant of Reap and Sow, but they must remain clustered.

:D

@JM Come with me to the Teacher's Lounge for a sec? ♪

@JM I always forget about those

@GraceNote Gimme a few; lotta tabs... :D

Take your time

3:26 PM

@Szabolcs which ones are those?

@rcollyer RankedMin and RankedMax

I'm wondering if this means that something interesting is going to happen to the site ... :-)

@Szabolcs ah yes, I never use those either, but Ranked*By versions would be useful.

@Szabolcs I'll admit, I'm curious also. Hopefully, something hasn't gone wrong.

@Szabolcs but, alas and alack, I turned down the post of mod, so we may never know.

If we'll never know, it's probably not that interesting...

It may be interesting in the sense of gossip, but not necessarily more than that.

So, do you know where you'll be in a couple of months?

Married? :D

3:32 PM

I meant location wise, but congratulations!

@rcollyer If there's no visa trouble, probably in Indiana. Won't make it before October though, too many things to arrange first...

@Szabolcs I understand that. Hopefully, we can meet up at some point. And, good luck with the driving!

Unfortunately, you won't miss the election. It is going to be a blood bath.

@rcollyer One of my former bosses said: if you don't learn before you're 25, you'll drive 'like my wife'. I'm getting really frustrated with the driving lessons and I'm starting to worry he was right.

@rcollyer I think this is my 8th lesson at least, and I still managed to stall the engine today.

@Szabolcs It can be tough. Personally, (if you had a car to borrow) I'd find a large empty parking lot and practice in it. Particularly the little things like shifting, turning, parking. Get those down in a controlled environment, so when you go out on the road, you'll have a better sense of the car itself.

@Szabolcs That decreases with time. But, it never fully goes away, much to my own chagrin.

We haven't been in a parking lot since the first lesson :-) But I'm making progress! The problem is that I find it really difficult to pay attention at several things at the same time, steering, shifting, engine sounds, and most importantly: being aware of what's going on around me and which car is doing what

But I'm glad I started learning here.

3:39 PM

Honestly, that is the most challenging part. There is a lot of things to keep track of.

I'm afraid if I learned in the US, I'd have a lot of trouble here ... narrow, winding roads, crazy drivers

@Szabolcs depends where in the US you learned :)

Ah the US has some of that, but not in the same quantity. Oh, never, ever drive in Louisiana; they are their own brand of crazy.

@EliLansey right, NYC is a different beast entirely.

Anyway, I have to actually get some work done today. Bye all.

@rcollyer Nothing quite like it.

@EliLansey that's the truth. Talk to you later.

3:42 PM

Bye!

@Szabolcs also, in the US people typically learn on automatic transmission

If any of you suddenly lost rep, sorry about that. I had to nuke a few things...

@JM lost 10, but no worries.

people who live in proprietary glass houses should not throw stones at a Q&A site...

2

@RM You'd think discretion is a common virtue, but no...

3:52 PM

For what it is worth, I did not even notice what it was that had to be nuked.

@Szabolcs networks?

Never mind. Found it.

@Szabolcs that'll disappear after some practice, don't worry

@rcollyer well what was it?

@JM might I ask the reason for the particular posts to be nuked?

@acl as a 4k+ user you have access to the delete list.

@rcollyer an excellent point

3:56 PM

And it avoids reposting anything publicly here.

@rcollyer remember that question with the house model that had to be nuked?

Something similar...

@JM seriously? the user, or a request by the referenced third party?

@JM I liked that house model question in a way. I still think it wouldn't hurt to re-ask something similar.

@rcollyer that I won't say.

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