Negative values?

[Ivan Voras]

Hi,

I need to represent negative values in charts, so the end result looks
something like this:

http://jcharts.sourceforge.net/userGuide/axisCharts/bar/images/userGuide/barCharts/barChart.png

(this is just a random image from google search)

Unfortunately, the library or Google APIs seem to scale the chart so
that it appears to be "absolute" - the lowest negative values is at
zero and the highest positive value is at maximum, and the horizontal
axis is again at the very bottom of the image, at zero.

Is this a limitation of Google API or something else?