Ah, yes. When I said "ComboChart supports all of the above types" I forgot
bar chart is also on that list :) By "all" I meant "including stepped-area
and candlestick". Anyway, column chart is supported, and that's what makes
sense.

On Thu, Mar 29, 2012 at 5:06 PM, asgallant <[email protected]>wrote:

> Y'know, I hadn't thought of that, but I suppose its a pretty good reason.
>  How would the Bar charts work with the others in a combo, though, given
> that they work on a different axis?
>
> On Thursday, March 29, 2012 9:16:14 AM UTC-4, Yuval Ronen wrote:
>>
>> Mixing ScatterChart and AreaChart isn't currently possible, and also
>> isn't planed, and I want to take this opportunity to explain the rationale
>> behind it.
>>
>> Area/Line/Column/Bar/**SteppedArea/Candlestick charts are all "function
>> charts". "Function" as in "mathematical function" - something that maps
>> values from some domain to target values. The domain can be either
>> discrete or 
>> continuous<http://code.google.com/apis/chart/interactive/docs/customizing_axes.html#Discrete_vs_Continuous>,
>> and each domain value has exactly one target value (or null). Each function
>> chart can have multiple series, where each series is a single mathematical
>> function, configured by the series option, and all series in the chart
>> share the same domain. ComboChart is a function chart where each series can
>> be of different type, from the above types (yes, all of the above types,
>> the docs are out-dated).
>>
>> ScatterChart, on the other hand, is not a function chart. Each "domain"
>> value can have multiple "target" values, even within the same series (and
>> therefor the terms "domain" and "target" aren't really accurate for scatter
>> chart). That's why scatter chart and function charts don't mix, at least
>> not easily.
>>
>> That said, you can try a ComboChart with 2 series, one of them configured
>> with {type: 'area'} and the other configured with {type: 'line',
>> lineWidth: 0, pointSize: 7}. This might be good enough for you.
>>
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