D3 graphing selective portions of data set

Question

I have a large time series data set I need to graph, and am trying to use D3 to do it. I plan to have my graph have the x-axis be time, and allow for movement of the graph in the x direction. I want to have the graph only load/display the points that exist in the current time range on the screen.

For example, if my dataset has times 1-100, but the graph starts out with times 1-10 shown, the graph should only graph points 1-10. Then the user may move to the right and see times 5-15 and the graph should update accordingly.

Can anyone explain to me how this might be done via d3? I am having a hard time bridging the understanding from an entire data set being loaded in at once and graphed immediately to selective graphing of subsets of the data.

Answer 1

I think you are looking for the selection.filter() function. For example you can have:

var allNodes = vis.selectAll("Nodes").data(data.nodes); 
var validNodes = allNodes.filter(function(d){return (d.time>1 && d.time <10)});
//use normal graph functions on validNodes.  

You can also apply filter directly on the array of nodes.