I would like to set a stack bar chart with bars starting from y<0, but I found the bar always start from zero.
In Bokeh, it has an option to set he bottom value for V bars, see link below:
The Bars element is a high-level chart and does not currently allow for setting the lower edge. The only approach to getting the equivalent of a VBar is to use a
Rectangles element at least for now. If you have suggestions on how to improve this, filing an issue would be welcome.
Thanks for your response.
Rectangles feed my needs.