That, and if you had multiple series in a non-stacked Column chart, it
would be difficult to (visually) tell the difference between data points
which share the same date and those that are adjacent in time. You can
simulate a "date" axis on your own, though, by inserting rows with null
data in them in between your actual data points. You'll have to choose
some level of granularity to represent the smallest measured unit of time
in your data, and insert rows based on that. For example, if you charted
data for the month of March, on a daily basis, your DataTable might look
like this:
var data = new google.visualization.DataTable();
data.addColumn('string', 'Date');
data.addColumn('number', 'Foo');
data.addColumn('number', 'Bar');
data.addRows([
['3/1', 7, 3],
['3/2', null, null],
['3/3', null, null],
['3/4', 4, 8],
['3/5', 2, 9],
['3/6', 6, 7],
['3/7', null, null],
['3/8', 8, 2],
.
.
.
]);
On Tuesday, April 3, 2012 7:04:13 AM UTC-4, MC Get Vizzy wrote:
>
> I don't know, but it probably has something to do with the width of the
> bars/columns: since dates are not (necessarily) evenly spaced, it's unclear
> how the chart would choose a column width. In some cases, columns might
> overlap.
>
> On Tue, Apr 3, 2012 at 5:25 AM, geeohgeegeeoh <[email protected]>wrote:
>
>> I don't dispute the behaviour of the ColumnChart() is exactly as
>> specified.
>>
>> But, from an interest-only perspective: *WHY* is this chart style
>> unable to take date specifiers?
>>
>> I am trying to understand how the codebase can process LineChart()
>> with date in column 0 but not ColumnChart()
>>
>> I know "use the source luke" but if a google chart API person can say
>> succinctly "why this is so" ...
>>
>> -G
>>
>
--
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/-/EBdJZmJcD-QJ.
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.
