D3图表，如何迭代通过Json数据NOT从文件？ [英] D3 Charts, How to iterate through Json data NOT from file?

问题描述

我试图将JSON数据（从AJAX调用）传递到使用D3图表来迭代数据的函数。我没有传递的URL到Json文件，我传递的数据从AJAX调用返回的Json。然而，每次我这样做，回调中的数据是未定义的，不会让我迭代通过它。如何管理？

I'm trying to pass JSON data (from an AJAX call) into a function that uses D3 charts to iterate through the data. I am NOT passing the URL to a Json file, I am passing the DATA from a Json that is returned from an AJAX call. Every time I do this, however, the 'data' in the callback is undefined and won't let me iterate through it. How do I manage this? I just want to iterate through the JSON data and draw things according to it.

这里是示例代码：

drawLine(jsonData)

function drawLine(chartData) {
    d3.json(chartData, function(data) {
        data.forEach(function(d) {
            d.date = parseDateD3(d.date);
            d.close = +d.close;
        });

    // DO STUFF PAST HERE TO DATA

    });
}

推荐答案

code> d3.json 如果你正在做一个AJAX调用。如果你已经有数据，代码应该是这样的。

You only need to use d3.json if you're actually doing an AJAX call. If you have the data already, the code should look like this.

function drawLine(data) {
    data.forEach(function(d) {
        d.date = parseDateD3(d.date);
        d.close = +d.close;
    });

  // DO STUFF PAST HERE TO DATA
}

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