I draw a multiBarChart using nvd3.js.
xAxis shows a date and i need to change the color of saturday's and sunday's bars, tooltips and xAxis labels.
I can add additional parameter to my json, such as:
{ x: someX, y: someY, series: 0, isHoliday: true }
But, for example, in tooltipContent callback function I can't access to json element, because it has such arguments - key, x, y, e, graph.
In tickFormat callback function I also can't access to json element, because first argument is x value and the second is index.
this is HighCharts example - https://www.dropbox.com/s/yf1rx5axl5h5wb2/2013-09-29_2216.png
Thank you and sorry for my English.