The finance charts weren't built using the Visualization API, so some of the features there are not available in the Visualization API. That said, when it comes to data conversion, you can almost certainly do it manually. The example I posted draws all series relative to their values at the beginning of the currently visible range (shown as a proportion, but could be converted to a percent), which is similar to what the finance charts do.
On Monday, August 20, 2012 2:02:05 PM UTC-4, kasimir wrote: > > This already helped me a little bit, but I'm still stuck with comparing > the performance on a relative basis like its possible at Google Finance. > > I somehow need to have a javascript that formats two (or more) datasets so > that I can compare their performances and I have absolutely no idea how I > could do this. > Since Google already does this on Google Finance I thought there might be > an "easy" solution. > > Sorry, but I'm a bit of a noob when it comes to the chart api and > javascript. > > On Friday, August 17, 2012 2:21:12 PM UTC-4, asgallant wrote: >> >> I helped someone else do something similar recently (see this >> thread<https://groups.google.com/forum/#!msg/google-visualization-api/oaVQYRmTWKg/cBARJyn5MXYJ>). >> >> That example is a bit more complicated than what you are asking here (they >> also wanted to be able to add and remove columns from the chart using >> CategoryFilter controls), but should give you a good idea of what’s >> possible. >> >> On Friday, August 17, 2012 1:32:13 PM UTC-4, kasimir wrote: >>> >>> Thanks for the reply, >>> I would like to compare the data on a relative basis (%), similar like >>> two (or more) stocks can be compared in Google Finance in a specified >>> timeframe where at t=0 both data-value are 0% and from there on the >>> performance can be compared. >>> Here is an example from Google Finance where the stocks of Google (in >>> red) is compared against Apple (in blue) in a time-frame of 1 month: >>> >>> http://www.google.com/finance?chdnp=1&chdd=1&chds=1&chdv=1&chvs=Linear&chdeh=0&chfdeh=0&chdet=1345233600000&chddm=8993&chls=IntervalBasedLine&cmpto=NASDAQ:GOOG&cmptdms=0&q=NASDAQ:AAPL&ntsp=0 >>> >>> Now I would like to use my own data and compare that to another dataset >>> or even compare my data against a stock. >>> >>> I'm asking because I have written a piece of software in PHP which >>> tracks performance data of companies and clients which is then visualized >>> in a google line chart, but it would be great to compare the data against >>> each other or against other market relevant data (like stocks or market >>> indexes) in a relative way. >>> >>> Hope I'm not the only one who can use this? :) >>> >>> On Thursday, August 16, 2012 11:29:50 PM UTC-4, asgallant wrote: >>>> >>>> What you want is most likely possible, but it depends on exactly how >>>> you want to compare the data. The chart's won't do everything for you in >>>> many cases, but you should be able to write javascript to format the data >>>> however you need for a given method of comparison. >>>> >>>> On Thursday, August 16, 2012 8:19:54 PM UTC-4, kasimir wrote: >>>>> >>>>> I have looked around but couldn't find an answer. >>>>> >>>>> I use a line-chart which gets its data from an XML file (updated daily >>>>> with date and a value per entry) and this works great. >>>>> Now my question, is there a way two data sources can be compared >>>>> against each other on a relative basis, kinda like how its done at Google >>>>> Finance when you compare one stock against an other, where the chart >>>>> turns >>>>> relative and compares the performance? >>>>> >>>>> Also is there a way that my data source can be compared with the Dow >>>>> Jones (for example) on a relative basis? >>>> >>>> -- You received this message because you are subscribed to the Google Groups "Google Visualization API" group. To view this discussion on the web visit https://groups.google.com/d/msg/google-visualization-api/-/hGZ-24zRN9MJ. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/google-visualization-api?hl=en.
