[Martha Farquar] Nice table, thanks!

I wish it would stop raining. I've got to walk home, ok, so it isn't far, but I don't own any protective clothing for such a downpour and some git has stolen my umbrealla. But then again if it wasn't raining there's still a high chance that i'd be here, as the other option is to revise for finals. Anyone got any good motivational/revision tips?

[MF] Are you angling for a pint too? [Lib] No motivational tips, but I know a welter of displacement activities. Prior to my finals, I arranged all my CDs according to spine colour. Bonus points if you can tell me how this is possible, bearing in mind that colours live in a 3-dimensional space. (Cue flerdle telling a different story).

[rab] Even if colour were a continuous 3D space, any finite collection of CD spines could still be sorted by colour because the space of CD colours wouldn't be continuous (indeed, because CDs themselves are discrete items, it seems to me that even an infinite collection of CD spines, coloured from a colour space of arbitrary dimension, would still be sortable by colour, but I must admit my grasp of such things is not what it used to be, if it ever was).

Yes, if you imagine a map of 3D colourspace, your CD spines are simply a series of points in that colourspace with close neighbours joined by a line of your devising. So your shelf represents a one-dimensional journey (as it were) in that 3D colourspace. If your CDs were reasonably well spaced out, then there are many many possible ways of doing this. I only know this because of my similar journeys through the three RGB dimensions when creating Acre Street moves. :)

[Martha Farquar] Very nice.

[matt, Projoy] Well yes, I suppose you could order colours by their hex rgb triplets, or Pantone number, or whatever. But that's not the way I chose to do it.

[Projoy] Pedantically, RGB hex colours for Acre Street moves aren't taken from a continuous space to start with, so it isn't quite the same problem, but on the other hand, it is. As you say there are any number of ways of connecting the dots and thus of sorting. Some of these may correspond to different ways of expressing colour in N dimensions (HSV, YUV, Lab, CMYK, etc), others may be more arbitrary. In the case of CD spines, the issue is more complex because they may be printed in multiple colours, and may include special inks or other production effects that don't fit into any such colour space (metallic, dayglo, holograms, fun fur, etc), which would have to be incorporated into any sorting scheme in some (probably arbitrary) way. [rab] So don't be coy -- how did you do it?

Oooh, have I posted in here before? Not sure. Anyway...
[rab, a coupla posts before, thanks for the cue] Apart from colours not existing, you're not too far off the mark, at least in the most classically accepted models...
And I have a collection of 50 novels (by the one author) arranged in colour order. The trickiest bit is knowing where to start, if you're going to arrange them simply linearly. Highly recommended for displacement.

[matt, flerdle] I give in and admit that I cheated slightly. Firstly I made use of the fact that I had two shelves, one for a grayscale (black to white) and one for colours ordered roughly according to the rainbow. The difficulties you mention arose:

• Spine not a single colour - resolved by choosing the 'dominant' colour.
• Shiny colours/trims - like gold and silver. Basically ignored, unless the entire spine was so made at which point I think I assumed the nearest matt alternative (like yellow for gold, or gray for silver).
• Colours not existing - like brown. See above. Pretend it's dark red.

So there you: Bob's yer Uncle - Job done. Interestingly I'm reminded of the time we discussed putting in for a grant to fund the development of a brown laser. However this plan was deemed to silly, and we opted to devise a photon accellerator instead.

[rab] Did it accelerate brown photons?

As for brown not existing - do you mean that just for light or for pigment? Does the Chancellor of the Exchequer also not exist?

My order jumps around a bit - some of the novels are very odd colours, but thankfully it's the one colour per book. I'm not perfectly happy with it but, given the colours they are, it's the best I could do at the time. Some of the names are misleading, but it sort of goes aqua-greenish-greenybrown-yellowish-orange-red-purplish (dark-light-dark)-darkblue-lightblue-grey-brownypinkygrey-pink-brown-chocolate.

[Dunx] What we call "brown" isn't spectral is perhaps what he meant. There are varieties of brown (reddish, yellowish) but it's generally considered to be a variation of yellow (dark) in most specification systems.

Actually, come to think of it, you have reddish browns and yellowish browns and greenish browns - but do you see bluish browns? I don't think so.

[flerdle, re remark to Dunx] Yes, I'm sure that's what I meant.

Oh, if only "nish" were a word...

[flerdle] I suppose. I still think there is a difference between subtractive colours (ie pigment) and additive colours (ie light) in this regard, though I would also readily concede that brown is almost as much an absence of any other describable colour as black - which is perhaps why you don't see bluish browns, because brown is essentially black with less blue in it.

Consider - when you mix paint to make brown, you start with yellow then add a bit of red and a small amount of blue. Another option is to just mix red and green, but I've also made brown by starting with red and adding black. There has to be some blue in there to take the colour away from being orange, but not enough to make the blue distinct: the blue in brown is like salt in vegetables.

I should perhaps clarify that I am not actually all that attached to the colour brown, and only own one pair of brown shoes.

[Dunx] Nothing to say about brown, but I do know a lovely Asian lady called Nish, so I suppose that almost makes it a word.

hmm. i think i will sell all my stock tomorrow and buy someone off that stupid i'm a celebrity get me out of here programme. that annoying one-nostrilled wierdly blonde bint.

[snorgle] Phil Tufnell looks good...then again, he's the only one of that group I've heard of. :)

[snorgle] So Daniella Westbrook is still going out in public, then?

Yesterday was the local council elections for the last twenty odd years I've always turned up and voted. But this time I was not persuaded by any of the candidates. As a supporter of democracy I felt that staying away could have been construed as voter apathy and my 'protest' misrepresented. So it was for the first and hopefully last time I entered the voting booth, did not put a cross against any candidate nor did I spoil the paper but left it blank, folded it and put it in the ballot box.

[Inkspot] I know what you mean. Spoiling your paper makes you look like a loony, not turning up makes you seem lazy. I think there should be a abstention box on the paper to recognise that you do feel you should vote, but don't agree with any of the candidates.

Interestingly enough, in my first year of uni I was accidently on two electral rolls, as my hall of residence automatically put everyone on. It was a general election so it is illeagal to vote twice (I was lead to believe, i'm not an expert). I phoned up the relevant person at the city council to tell her that I wasn't allowed to vote. Her advice to me was just not to turn up, which i protested about as I didn't want to be part of the apethetic 70% of the population who don't vote. My local council now at home has had the sense to only grant me votes for local elections as you are allowed to vote in two places at once for local matters, but it took them 5 years to realise this.

I'm generally a big fan of elections, but increasingly I feel unmoved to vote in local council elections. Why? Firstly I am not really aware of what councillors do, and what difference it would make if Mr X were sitting on the council rather than Ms Y. Or vice versa. How much is a council capable of doing; and how much is dependent on the policies of central government? Does it make much of a difference if your councils majority party is the same as that of the central government? Is it better to have councillors who are signed up to a party? Or is it better to have independents? The fact that I cannot answer any of these questions makes it impossible to put an X against one (or is it three?) of a dozen names, most of which I've never heard of.

I don't understand this notion that one "should" vote. I certainly don't understand why in Australia you have to by law. Everyone goes on about how terrible it is that fewer people vote at each election. Why is this so terrible? What difference does it make?