Google Charts Column chart - How can I show a tooltip when the value is so small the column height < 1 pixel?

[arka....@gmail.com]

I am displaying some visualizations using Google Charts.

There is great variance in the data so some large numbers co-exist with small ones. In the case of aColumn Chart this results in a scaling whereby some of the small values probably compute to less than one pixel of height and are thus invisible.

As a result there is no area to hover above, so I cannot show a tooltip.

Is anyone aware of a way to show a tooltip in this situation?

How about the white space above columns? Is there a way to include that as part of the hover region? I cannot find info about this in the Google Charts documentation so it is unlikely, but maybe someone is aware of a way...

[Daniel LaLiberte]

If you set the baselineColor for the vAxis to 'transparent' then you can see even a 0 value, and hovering over it works.  The ColumnChart should now show at least one pixel of height, but it would be hidden by the baseline.  

Another thing to consider is to use log scale, if you have a large number of small values and relatively few large values.  If you need to represent 0 values, there is a scaleType: 'mirrorLog' option instead which can show negative and 0 values.

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Daniel LaLiberte  - 978-394-1058

dlaliberte@Google.com   5CC, Cambridge MA

daniel.laliberte@GMail.com 9 Juniper Ridge Road, Acton MA