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| | The "this is incomplete because it needs further information" is not much of an explanation of what needs to be completed. It looks like the tag was added when the explanation was really, really poor and it't now obsolete. I would update it if I could figure out something that is still missing, but at this moment it looks like removing it altogether could be a better option. [[Special:Contributions/173.245.53.117|173.245.53.117]] 09:54, 5 December 2013 (UTC) | | The "this is incomplete because it needs further information" is not much of an explanation of what needs to be completed. It looks like the tag was added when the explanation was really, really poor and it't now obsolete. I would update it if I could figure out something that is still missing, but at this moment it looks like removing it altogether could be a better option. [[Special:Contributions/173.245.53.117|173.245.53.117]] 09:54, 5 December 2013 (UTC) |
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| − | : Agreed. Removed. —[[User:TobyBartels|TobyBartels]] ([[User talk:TobyBartels|talk]]) 17:28, 5 December 2013 (UTC)
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| − | One obvious problem with the data is that one does not maintain a level of smugness and thus the chart dips eventually, as in the graph (but to an unknown extent).
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| − | The problem is that you don't know the rate of "getting over yourself". Without a TV to remind you that you don't have a TV, you stop feeling smug by getting on with your life. The idea of not having a TV then becomes a different problem if when in conversation you tell anyone that you don't have a TV. This very seldom happens and has its own emotional curves.I used Google News BEFORE it was clickbait 07:36, 10 January 2015 (UTC)
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| | I feel quite smug, not having to pay £145.50 a year to watch people wanting to be famous, or wanting to remind people that they used to be famous, screaming for attention on "Strictly Got Talent Factor On Ice Brother" [[Special:Contributions/141.101.99.218|141.101.99.218]] 16:06, 5 December 2013 (UTC) | | I feel quite smug, not having to pay £145.50 a year to watch people wanting to be famous, or wanting to remind people that they used to be famous, screaming for attention on "Strictly Got Talent Factor On Ice Brother" [[Special:Contributions/141.101.99.218|141.101.99.218]] 16:06, 5 December 2013 (UTC) |
| − | :As a fellow Britisher, similarly not paying for (or needing!) a TV Licence, I think this might need explaining to the furriners here. There are different payment methods (<strike>up to</strike> down to, and including, purely commercial channels, but also the same cable/satelite subscriptions as we might ''also'' have to make) supporting TV channels, elsewhere. And how do ''you'' deal with the TV Licencing people, pestering you about your TV that you (I presume) do not have? [[Special:Contributions/141.101.99.229|141.101.99.229]] 02:05, 6 December 2013 (UTC)
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| − | :: 5 simple words: "I don't have a TV" and they go away for a couple of years. [[Special:Contributions/141.101.98.211|141.101.98.211]] 11:27, 6 December 2013 (UTC)
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| − | Getting threatening letters from the licensing authority tends to irritate. It is related to other non-smug effects of not having a TV such as the people in charge of TV progammes' support of every human ailment from STOOOPID to paedophilia.I used Google News BEFORE it was clickbait 07:36, 10 January 2015 (UTC)
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| − | ;Sigmoid function or Sine curve
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| − | I'm sorry, but the {{w|Sigmoid function}} doesn't fit the graph. A sine looks much more closer but in fact it is some like f(x) + g(x), the second part looks much more like a sine (but also not accurate) while the first part looks different. And only the second derivative on this graph is important. So g(x) looks similar to a sine and the second derivative shows just an inverted plot, that's the point. There is no real math function.--[[User:Dgbrt|Dgbrt]] ([[User talk:Dgbrt|talk]]) 20:39, 5 December 2013 (UTC)
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| − | :Back-tracing the provided graph, the (negative) second derivative is clearly near zero up until nearly 1950, declines to a minima around 1965 (it appears to be around 40 pixels per decade, along the scale) before crossing the zero mark at 1980 to a maxima around 2001/2002-ish, then falling again.
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| − | :Thus the (positive) first derivative (with an unknown constant of offset) is near horizontal until the 1950s, rises to its steepest in 1965 (i.e. the acceleration in rate of growth is the highest... consistent the uptake of the 'new' technology being popular), continues upwards but finally hits a maxima (in actual rate of growth of TV ownership) in 1980, before tailing off (probably still a rate of ''increase'', but near saturation level. Just after the millenium is around the time I'd expect to see a rise in Large Screen TVs being sold (plasma TVs were late '90s, and we're starting to see proper flatscreen LCDs and, later, OLED versions).
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| − | :So, can we relate that to the 'zeroeth' derivative? (i.e. The actual rate of TV ownership... or is it sales..? May be both if you allow for multi-TV homes.) Starting at zero ownership, there was a slow uptake around the 1950s (for the UK, 1953 - the year of the Coronation - was supposed to be the start of the mass-market TV revolution, but perhaps only around one house a street actually ''getting'' a TV for the event... still, it'd somewhat match the quick start of the (negative) curve in the cartoon). The mid 1960s was (amongst other things) the height of the Space Race, and thus in the white-heat of that particular phase of technology. By the 1980s, most existing households without TVs weren't ''going'' to get them, so uptake would have flattened from that point onwards, until eventually the millenium came about and newer/additional sets were installed in houses during that particular credit-boom and period of techno-consumerism.
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| − | :IIW, I think it matches a (convoluted, multi-inflected) S-curve from zero on upwards. Possibly beyond 100% if multi-TV ownership counts to technically allow the original curve to strike up above that value. I may have zero TVs operating in my house but most families I know have at ''least'' two of them. [[Special:Contributions/141.101.99.229|141.101.99.229]] 02:05, 6 December 2013 (UTC)
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| − | As you (Dgbrt) say, the sine curve doesn't fit the beginning (and it would require TV ownership rate to also fit a sine curve, which is implausible). But the sigmoid curve fits it fine! People above have posted some negative second derivatives of sigmoid curves, and they match the graph. Here is a broad selection: [http://www.wolframalpha.com/input/?i=2nd+derivative+-4%2F%281%2Be^%28-x%29%29 0], [http://www.wolframalpha.com/input/?i=2nd+derivative+-erf%28sqrt%28pi%29%2F2*x%29 1], [http://www.wolframalpha.com/input/?i=2nd+derivative+-tanh+x 2], [http://www.wolframalpha.com/input/?i=2nd+derivative+-2%2Fpi+*+gd%28pi%2F2+*+x%29 3], [http://www.wolframalpha.com/input/?i=2nd+derivative+-x%2Fsqrt%281%2Bx^2%29 4], [http://www.wolframalpha.com/input/?i=2nd+derivative+-2%2Fpi+*+atan+%28pi%2F2+*+x%29 5], [http://www.wolframalpha.com/input/?i=2nd+derivative+-x%2F%281%2B|x|%29 6] (list derived from Wikipedia's article). I think that Randall's curve fits best between 1 and 2 (it all breaks down when you get to 6). —[[User:TobyBartels|TobyBartels]] ([[User talk:TobyBartels|talk]]) 04:53, 6 December 2013 (UTC)
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| − | :Am I blind or do I hallucinate? The sigmoid curves look very different, just let's say it is a graph and explain the second derivative.--[[User:Dgbrt|Dgbrt]] ([[User talk:Dgbrt|talk]]) 11:47, 6 December 2013 (UTC)
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| − | ::The main point of this seems to be smugness being relative to how odd you are compared to the average. The problem here is the oddness is by choice or simply you can't afford one in the early days. The difference towards the more modern era will be that people will feel smug for not having a TV, but may also feel smug for owning way above average many TVs. Other options also should have altered the graph, such as multi-function TV/Monitors(which I'm using mostly for a monitor and occasionally as a TV for science documentary) and smart phones/tablets which got TV functions, on the other hand, people may own a TV as part of a home entertainment system, which means what is showed in the channels is completely irrelavent. The increase of options has reduced the smugness for not owning one, because there are so many things with a TV function and so many things a TV can do, not owning one means that you are almost technologically isolated, which most would feel embarassed. [[Special:Contributions/173.245.62.228|173.245.62.228]] 18:42, 6 December 2013 (UTC)
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| − | :::I'm only talking about the sigmoid graph, it's simply wrong. I never did criticize the interpretations and explanations, that function simply doesn't match the plot at the comic. --[[User:Dgbrt|Dgbrt]] ([[User talk:Dgbrt|talk]]) 20:10, 6 December 2013 (UTC)
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| − | Check for blindness or hallucination:
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| − | * Do you agree that Randall's graph looks more or less like the 7 graphs that I linked above, especially the first few? (Same basic shape.)
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| − | * Do you agree that Wolfram Alpha produced those graphs after I properly asked it about the negative second derivatives of various functions? (Check for words "second derivative" and minus sign.)
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| − | * Do you agree that these functions are all listed on the Wikipedia page about sigmoid curves? (Graph 0 matches the formula for a logistic function, multiplied by 4 to put it on the same scale as the others; graphs 1 through 6 have the same formula as the graph on Wikipedia comparing six sigmoid curves.)
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| − | If you can see all of this, then you are not blind or hallucinating.
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| − | Nota bene: nobody is claiming that Randall's graph is itself a sigmoid curve. It is the negative second derivative of a sigmoid curve. This is what it should be, since Randall conjectures that it's the negative second derivative of the TV ownership rate, and the TV ownership rate should follow a sigmoid curve.
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| − | —[[User:TobyBartels|TobyBartels]] ([[User talk:TobyBartels|talk]]) 06:04, 7 December 2013 (UTC)
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| − | :First: Randall does not publish a transcript after the next comic is released because he is laughing about discussions like here.
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| − | :But more Randall didn't use a function, he was only talking about the second derivative of that plot.
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| − | :So, we just have to explain that '''derivative''', which is still more like a (minus) sine. --[[User:Dgbrt|Dgbrt]] ([[User talk:Dgbrt|talk]]) 20:42, 7 December 2013 (UTC)
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| − | :: Umm... no, actually, "he was only talking about the second derivative" of the (not-shown) TV-ownership function. The smugness plot (depicted) looks quite like the negative second derivatives of sigmoids, doesn't it? -- [[Special:Contributions/173.245.51.210|173.245.51.210]] 01:32, 8 December 2013 (UTC)
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| − | :::Holy crap, as {{w|Sigmoid function|wiki}} says: "A sigmoid formula is a mathematical function having an "S" shape (sigmoid curve)." It looks like this [https://en.wikipedia.org/wiki/File:Gjl-t%28x%29.svg graph] and really does NOT match this [http://imgs.xkcd.com/comics/i_dont_own_a_tv.png one]. There is just no simple graph to explain Randall's plot.--[[User:Dgbrt|Dgbrt]] ([[User talk:Dgbrt|talk]]) 20:20, 8 December 2013 (UTC)
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| − | :::: Don't worry, nobody is claiming that a sigmoid graph looks like this graph. The claim is that the SECOND DERIVATIVE of a sigmoid graph looks like this graph. See the pictures on the Wolfram Alpha pages that I linked earlier; you will see that most of them (all but the last really, but the earliest ones the best) look like this graph. All of them are computed by Wolfram Alpha as second derivatives of sigmoid graphs; in fact, they are all second derivatives of opposites (negatives) of formulas given on the Wikipedia article as examples of sigmoids. —[[User:TobyBartels|TobyBartels]] ([[User talk:TobyBartels|talk]]) 17:37, 10 December 2013 (UTC)
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| − | Sigmoid curve:
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| − | [[Image:SigmoidCurve.gif]]
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| − | Second derivative of a sigmoid curve:
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| − | [[Image:2ndDerivativeSigmoidCurve.gif]]
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| − | Negative second derivative of a sigmoid curve:
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| − | [[Image:Negative2ndDerivativeSigmoidCurve.gif]]
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| − | vs
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| − | Sine curve:
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| − | [[Image:SineCurve.gif]]
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| − | It seems clear to me that the sine curve matches the graph from about 1960, but the negative second derivative of the sigmoid curve (curve 2 from my series above) matches the overall graph better. —[[User:TobyBartels|TobyBartels]] ([[User talk:TobyBartels|talk]]) 18:06, 10 December 2013 (UTC)
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| − | I think that the new explanation for the title text, while somewhat accurate is a bit overcomplex.
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| − | 1. There is probably a simpler way to explain what a second derivative is (not necessarily diffently described; it's just a bit jumbled up in the description).
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| − | 2. For the purposes of explanation, I doubt that so much detail is needed, especially because the real-life meaningfulness of the second derivative of TV ownership doesn't seem like much at all.
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| − | I would suggest something like this, but with a bit more depth: The title text sugests that smugness and the second derivative of TV ownership are related. The derivative of a graph is its rate of change at any given point, and the second derivative is the rate of change in the first derivative. [[User:Zweisteine|Zweisteine]] ([[User talk:Zweisteine|talk]]) 06:01, 9 December 2013 (UTC)
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| − | I disagree with the explanation (to some degree). The thing why people don't feel smug about not owning a TV is because Smart-TV is the new thing. I don't think the program has to do a lot with this trend. It's just Smart-TV is the new cool thing, yet it's still a TV. So instead of just wanting to own a TV many people go to wanting to own a big nice Smart-TV with new features and stuff. Blah! {{unsigned ip|162.158.83.144}}
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