File talk:UK opinion polling 2010-2015.png

How does one update the chart on this page with the latest poll data from this page? I'd be happy to do this on a much more regular basis, e.g. weekly, but I don't know how to do so. — Preceding unsigned comment added by 139.149.31.231 (talk) 09:22, 8 May 2014 (UTC)

Can you re-upload this without all the blank space between March 2013 and 2015, its not necessary besides there's always a chance of a snap election (unlikely I know but we don't have a crystal ball do we) 130.88.114.46 (talk) 00:00, 18 April 2013 (UTC)

Scale
I really don't think this needs to go up to 55, 50 would be plenty...no-one got over 50 since 1931. 92.15.61.7 (talk) 07:38, 1 May 2014 (UTC)
 * In election results maybe not. In opinion polls, the latest a party got above the 50% was not too long ago (in 2008, the Tories, in a Ipsos-MORI poll (see here)). Furthermore, between 1994 and 2001, it was frequent to see the Labour Party polling above the 50% mark and even near (or above!) the 60% mark. Impru20 (talk) 10:09, 1 May 2014 (UTC)
 * True, but it seems far from likely this parliament. The whole thing already looks too small, presumably limited width for the (literally <1% of) people still not using widescreen. Could be changed if needed, or changed on election if no-one gets a 50 poll, don't know how tricky it is to change scale.92.15.61.7 (talk) 17:06, 5 May 2014 (UTC)

2015
I think now we're almost at the election, we should reduce the scale to a maximum of 50%, as no-one is likely to go above that now. Clyde1998 (talk) 16:53, 9 April 2015 (UTC)

Should more parties be added?
Greens are polling above LibDems in some polls. Shouldn't there be a green line for the Greens and a grey line for Other? The graph is currently misleading as it does nothing to suggest other parties even exist let alone take a significant percentage of the vote. Not sure if PlaidCymru/SNP have enough support to warrant their own line though. Chessrat (talk) 20:08, 19 August 2014 (UTC)

Average
How exactly is the average curve calculated, is it the average of all polls within a 15-day window?RobDR (talk) 23:32, 20 August 2014 (UTC)


 * More or less, though it also takes into account polls from the previous 15 days as well as the subsequent 15 days in order for the line to remain smooth, and to prevent lone outlier polls from distorting the average too much. Cheers. Impru20 (talk) 00:09, 21 August 2014 (UTC)
 * So it's a 30-day window?RobDR (talk) 07:54, 21 August 2014 (UTC)
 * It's a 15-day window (the average is calculated every 15 days) but including the previous and the subsequent 15 days. So let's say, for example:
 * You want to calculate the average on 15 August. What I do is to make the average between 1 and 15 August. Then I make the average between 15 July and 15 August and then, once data is available, the average between 1 August and 1 September. Finally, the average of all of it is done.
 * The same will be done when you want to calculate the average for 1 August, for 1 September, for 15 July, 15 September... and so on.
 * This may sound rather complicated, but it is a result of the evolution of the method I've been using to make these graphs, and so far it has proven to be quite accurate in showing trend lines while also maintaining the trend line itself smooth. Cheers. Impru20 (talk) 11:16, 21 August 2014 (UTC)
 * Ah, I get it. It's a 30-day average, calculated every 15 days. Thanks. RobDR (talk) 05:06, 22 August 2014 (UTC)

Description
The description should provide a legend telling which party is represented by which color. This is possibly obvious for UK residents but not for others interested in this diagram. Thanks, AFBorchert (talk) 10:57, 21 November 2014 (UTC)