You could do something like this with a combo chart (line + column), but not bar charts. The way I have gone about this in the past is to overlay an image of a line (or other marker) on the chart after it is drawn.
-- 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/-/N4nxk9hQlB8J. 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.
