score:0

Nearly there, but your code has two problems: First the tick values must be specified in an array, and second those values should be Javascript date objects. i.e. you just provide an array of dates to tickValues so your code would looks something like this:

xHourAxis
 .tickFormat(d3.time.format('%I %p'))
 .tickValues([new Date(2000,10,5), new Date(2005,2,7), new Date(2007,11,11)]);

Also, note that you needn't call the ticks() if you are going to later specify custom values.


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