How can i use statistics to create a true time-series, showing 0 for null-values?

[angelacode]

I am currently using statistics to create an array of key/value pairs around dates and the sums of activity on that date (emails being sent).

I use that information in a graph.

However, on days when the date has 0 activity, there is no key-value pair. So I cannot create a true time-series graph. Is there something in statistics I could do, or would this be in ruby post processing, and if so, how?

[khelal]

hello, i would also be interested in doing such a thing. did you end up doing it through the gem?