Is d3.json() function can get json object?

问题

I am new to JQuery / d3js world.

I would like to draw a chart from data in json format. I saw i some samples that d3.json(json,f) function can get only file with data in json format. My question: is it possible to call it with json like object or string in json format,for example:

val jsonStr = { "foo" : "bar"}
d3.json(jsonStr ,f)

If not how can I draw a chart with dynamic data (in json format)

回答1:

If you have the data as a Javascript variable, you don't need the d3.json function. Simply use the name of the variable where ever you would use the argument to the second parameter (the callback function) to d3.json.

var data = [1,2,3];   
svg.selectAll("circle")
.data(data)
.enter()
.append("circle")
.‌​attr("cx", function(d) { return d; })
.attr("cy", function(d) { return d; })

来源：https://stackoverflow.com/questions/13799571/is-d3-json-function-can-get-json-object