You could try using a 
ChartRangeFilter<https://developers.google.com/chart/interactive/docs/gallery/controls#chartrangefilter>,
 
which would allow you to zoom and pan the data set to see the data points 
that are dropped when there isn't enough space to accomodate them.

On Wednesday, May 30, 2012 3:57:39 AM UTC-4, Ken wrote:
>
> I am using corechart columnchart to plot sometimes as many as 3000 to 
> 4000 points. I have been assuming the addRows method would try an pack 
> all the points into my 600px wide chart as the previous Load 
> Columnchart did. However it truncates after to about 280 column plots. 
> Question: is this normal? 
> I have worked around this by by plotting a maximum of 280 or so column 
> plots, by using every 16th point of my 3000 points. 
> Question: is this the right approach? I cannot understand why the 
> method doesn't do this. Or, where am I missing the point please?

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