javascript - Plot dynamic Nvd3 chart without reinitialising? -

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i'm creating pie chart:

var chart = nv.models.piechart()         .x(function(d) { return d.key;   })         .y(function(d) { return d.value; })         .valueformat(d3.format(',d'))         .labelsoutside(true)         .showlabels(true);

and i'm retrieving data repeatedly via ajax , updating chart:

(function loop() {     d3.json(url, function(data) {         d3.select('#chart svg').datum(data).call(chart);     });     settimeout(loop, 2000); })();

however, if uncheck 1 of values in legend remove entry reappears @ next timer refresh, causing slice reappear.

is there way refresh data without causing reinitialise? i've tried using .data instead of .datum no avail.


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