Is there a simple way to format the date of a d3/nvd3 graph as displayed in the image below?
i.e. Rather than displaying the whole date against each tick, have the date grouped by date part; so the year is only displayed once, with all months within that year listed above it, then those months with the days listed above them?
I've Googled and at looked at the available D3 formatting options but have so far found no examples or solutions which works in this "grouped" way.