Highcharts: how to group data points and display the total accordingly? -

i new highcharts. need display line chart.

here categories:

 ["9/7/14", "9/8/14", "9/9/14", "9/10/14", "9/11/14", "9/12/14", "9/13/14", "9/14/14", "9/15/14", "9/16/14", "9/17/14", "9/18/14", "9/19/14", "9/20/14", ...] 

here data series:

[1, 4, 0, 2, 1, 1, 1, 5, 3, 1, 0, 0, 6, 8, ... ] 

what hope achieve group every 3 dates , total , display accordingly. this:

["9/7/14", "9/10/14", ...] [5, 4, ... ] 

is highcharts can out-of-box , how if yes?

thanks , regards.

it's not possible when using categories. when using categories, need calculate on own.

in highstock, feature called datagrouping - however, doesn't work categories.