Hi everyone.

I've recently been looking at the graphs provided by Google App Engine
on the status pages. They're fantastic and from them I'm able to view
some really useful statistics. Unfortunately I'm only able to identify
the "probable" current value, eg; at the last collection interval the
value is sort of half way between the y axis labels of 0 and 250 so
it's around 125. I'd like to know the actual current value. The only
way I could work out how to do this was to disect the graph, which is
generated by the Google Chart API, and calculate the latest value.

The chart data is in Extended Encoding format and I'm having
difficulty correlating the encoded values in the URL to what I'm
seeing on screen. In fact, I've pretty much fallen flat on my face
trying to work it out.

http://www.google.com/chart?chxt=x,y&chd=e:AOAgAkA9BDBXBoCECNCoC5C7DMDdDzEKEeEpE6FDFUF1GCGTGeGvHKHMHdH9INIYIxI1JNJkJoKGKRKYKYLpLpLvMDMfMnNBNONXNlN.OHOoO5PDPLPoP9QKQaQuRBRDReRyR3SHSoS5TBTLTsT1ULURUlVBVQVkVlV9WUWlWpXBXSXpX9X.YRYhY.ZQZjZpZ2aOafa5a8bLbsb9cLcUctczdSdbdseGeIecepe6fNfjfygNgegpgyhShZhlh2iXimisjDjLjmj3j-kfkikylKljlvmEmXmbmsnEnSngn3n-oZomoypDpjp0p2qOqcq5rBrLrsr6r-sfsws3tFtbt0uFuIuouzu8vXvivzwNwXwiw9xPxVxsyByHyoywzBzbzcztz-0f0t1A1H1j1p2A2X2Y2t3I3V3q393-4Y4w4-5E5V5w6D6X6e6t7I7Y7c7t8L8X8j8y9S9g9v92-X-e-q-6.b.s.t,HvIeJRIIG6GYGWGOGBGoN4N7MOFcF8GuHGHXJiJRISGRH8IQHoIdIBICGbGGGYH6I2I6HMGHGhHSH0HX____GeGuGiHiH8I8LqLpGCFsFmGGKGKKI7G1G-H9IjH5KcKbKiImInHtIEP6QkO.LMRVXUXxSFO8SGbFawgXdhXXWdXDVrV0WaWSX3SPQkTDR9UWP.PNOvOjP7J9G.JyKeKwK6J0KUNCNhNYNZOlK0H.HXHmH4KhOuRLOoSMa0YvMYP8a3arY1OZVhY7VIMfMkLmHmLTNXKBMJN6KzJjJlPRQVMRL7RyO6JAJKJnKHHRGEGNGdGHIqJpJoIkOzPAPDJUNwOrOrK9MjLtJKJCJbIrIjIYH9H5JEMtMVKyG0HoH1IbIfH7G7F.HGGrGgGRGtHJHXHYGOGcGJGhGlGjGGF5G5G2GCFlGQGaGnGjHvIkH-GAGiGlF9FdG2IOIXF0F7GHFpFWGGGNGD,KYK5LCLLLpLp,HX4R41pEGe__&chxp=0,0.0,16.7,33.3,50.0,66.7,83.3,100.0|1,20.0,40.0,60.0,80.0,100.0&chxs=&chg=0,20.00,1,2&chco=0077cc,cccc00&chm=R,7f7f7f,0,0.000,0.001|R,7f7f7f,0,0.167,0.168|R,7f7f7f,0,0.333,0.335|R,7f7f7f,0,0.500,0.501|R,7f7f7f,0,0.667,0.668|R,7f7f7f,0,0.833,0.835|R,7f7f7f,0,1.000,1.001|B,eaf0f4,0,0,0|B,ffffcc,1,0,0&chs=700x290&cht=lxy&chxl=0%3A%7C5/12%2012%20AM%7C4%20AM%7C8%20AM%7C12%20PM%7C4%20PM%7C8%20PM%7C5/13%2012%20AM%7C1%3A%7C250.00%7C500.00%7C750.00%7C1000.00%7C1250.00&chls=2,0,0|2,0,0&chxx=0_0

http://code.google.com/status/appengine/detail/serving/2010/05/12#ae-trust-detail-helloworld-get-latency

Would someone be kind enough to explain where I'm going wrong?

I'll admit to only having started learning about the Google Chart API
(one of those truely fantastic free tools with limiteless
possibilities) so I'll apologise in advance if I ask lots of stupid
questions along the way.

Many thanks.

Anthony.

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