根据选择将数据记录到控制台

Question

我有一个这样的数据数组：

var data = [
    ["Acid", 0.741593940836, 0.45657115],
    ["Cannabis", 0.94183423, 0.31475],
    ["LSD", 0.1367547, 0.936115]
];

哪个图指向散点图。

我还有其他类似的数据数组-在data中用每个子数组的相同名称声明这些数组。然后将这些数组存储在一个数组中：

var Acid = ["leak","advice", "draft","addition","genuine","object","advance","freshman","sour","say","page","old","loot","white","soul","wriggle","agony","sensitivity","laundry","format"];

var collection = [Acid, Cannabis, LSD];

我正在尝试创建一些代码，根据散点图中的点选择返回一个（两个或全部）数组（Acid，Cannabis，LSD） 。到目前为止，我的代码如下-应该注意的是，选择点是通过Lasso完成的，我也包括了该代码。

var lasso_end = function() {

    lasso.items()
        .classed("not_possible",false)
        .classed("possible",false);

    var selected = lasso.selectedItems()
        .classed("selected", true)
        .attr("r", 13);

    var selectedPoints = [];

    selected.data().forEach((arr) => {
        arr.forEach((d) => {
            selectedPoints.push(d);
        });
    });

    for(var i = 0; i < selectedPoints.length; i++) {
        for(var j = 0; j < collection.length; j++) {
            if(selectedPoints[0] == collection[j]) {
                console.log(collection[j]);
            }
        }
    }

只需重申一下，我正在尝试将数组Acid，Cannabis和LSD的数据记录到控制台，如果指向数组data被选中

针对其中一项评论，我在console.log()之后放置了selectedPoints，这是输出和格式：

Answer 1

好吧，如果我理解正确，那么做完

selected.data().forEach((arr) => {
    arr.forEach((d) => {
        selectedPoints.push(d);
    });
});

您的selectedPoints数组注销为

"Acid",
0.123123,
0.123131,
"Cannabis"
0.232222,
0.221121... etc. 

，然后您要console.log名称在上面输出中的数组，这里是数组Acid和Cannabis。

问题在于，您创建的数组collection的命名变量包含单词array：保存该数组的变量的名称无法传输，您不能执行

var foo = 2
var array = [foo]

并尝试使用array[foo]访问该值，这不是JS数组的工作方式。他们只有数字索引。

您应该使用一个对象：

var collection = {
    Acid: ["leak","advice", "draft","addition","genuine","object","advance","freshman","sour","say","page","old","loot","white","soul","wriggle","agony","sensitivity","laundry","format"]
}

，然后从selectedPoints

提取名称

var pointNames = selectedPoints.filter(x => typeof x === "string") 

并遍历pointNames数组，并在对象collection上注销相应的属性（如果存在）。这是一个简化的代码段：

var data = [
    ["Acid", 0.741593940836, 0.45657115],
    ["Cannabis", 0.94183423, 0.31475],
    ["LSD", 0.1367547, 0.936115]
];

var selectedPoints = ['Acid', 0.741593940836, 0.45657115];

var collection = {
  Acid: ["leak","advice", "draft","addition","genuine","object","advance","freshman","sour","say","page","old","loot","white","soul","wriggle","agony","sensitivity","laundry","format"]
}

var pointNames = selectedPoints.filter(x => typeof x === "string")

 pointNames.forEach(point => {
   if(collection[point]) {
    console.log(collection[point])
   }
 })