我正在用D3.js创建一个简单的折线图。当用户双击折线图上的时，我希望能够提取日期和值。目前，我只想弹出一个警告，显示该日期折线图的日期和价值。
需要精确度元素 - 因为如果在折线图上没有出现双击，我希望忽略双击事件。
以下是简单折线图的代码：
<!DOCTYPE html>
<html>
<head>
<script src="https://d3js.org/d3.v4.min.js"></script>
</head>
<body>
<svg width="960" height="500"></svg>
<script>
var svg = d3.select("svg"),
margin = {top: 20, right: 20, bottom: 30, left: 50},
width = +svg.attr("width") - margin.left - margin.right,
height = +svg.attr("height") - margin.top - margin.bottom,
g = svg.append("g").attr("transform", "translate(" + margin.left + "," + margin.top + ")");
var parseTime = d3.timeParse("%d-%b-%y");
var x = d3.scaleTime()
.rangeRound([0, width]);
var y = d3.scaleLinear()
.rangeRound([height, 0]);
var line = d3.line()
.x(function(d) { return x(d.date); })
.y(function(d) { return y(d.close); });
d3.tsv("data.tsv", function(d) {
d.date = parseTime(d.date);
d.close = +d.close;
return d;
}, function(error, data) {
if (error) throw error;
x.domain(d3.extent(data, function(d) { return d.date; }));
y.domain(d3.extent(data, function(d) { return d.close; }));
g.append("g")
.attr("transform", "translate(0," + height + ")")
.call(d3.axisBottom(x));
g.append("g")
.call(d3.axisLeft(y))
g.append("path")
.datum(data)
.attr("fill", "none")
.attr("stroke", "steelblue")
.attr("stroke-linejoin", "round")
.attr("stroke-linecap", "round")
.attr("stroke-width", 1.5)
.attr("d", line);
});
</script>
</body>
</html>
以下是data.tsv的内容：
date close
24-Apr-07 93.24
25-Apr-07 95.35
26-Apr-07 98.84
27-Apr-07 99.92
30-Apr-07 99.80
1-May-07 99.47
2-May-07 100.39
3-May-07 100.40
4-May-07 100.81
7-May-07 103.92
8-May-07 105.06
9-May-07 106.88
10-May-07 107.34
11-May-07 108.74
14-May-07 109.36
15-May-07 107.52
16-May-07 107.34
17-May-07 109.44
18-May-07 110.02
21-May-07 111.98
22-May-07 113.54
23-May-07 112.89
24-May-07 110.69
25-May-07 113.62
29-May-07 114.35
30-May-07 118.77
31-May-07 121.19
1-Jun-07 118.40
4-Jun-07 121.33
5-Jun-07 122.67
6-Jun-07 123.64
7-Jun-07 124.07
8-Jun-07 124.49
11-Jun-07 120.19
12-Jun-07 120.38
13-Jun-07 117.50
14-Jun-07 118.75
15-Jun-07 120.50
18-Jun-07 125.09
19-Jun-07 123.66
20-Jun-07 121.55
21-Jun-07 123.90
22-Jun-07 123.00
25-Jun-07 122.34
26-Jun-07 119.65
27-Jun-07 121.89
28-Jun-07 120.56
29-Jun-07 122.04
2-Jul-07 121.26
3-Jul-07 127.17
5-Jul-07 132.75
6-Jul-07 132.30
9-Jul-07 130.33
10-Jul-07 132.35
11-Jul-07 132.39
12-Jul-07 134.07
13-Jul-07 137.73
16-Jul-07 138.10
17-Jul-07 138.91
18-Jul-07 138.12
19-Jul-07 140.00
20-Jul-07 143.75
23-Jul-07 143.70
24-Jul-07 134.89
25-Jul-07 137.26
26-Jul-07 146.00
27-Jul-07 143.85
30-Jul-07 141.43
31-Jul-07 131.76
1-Aug-07 135.00
2-Aug-07 136.49
3-Aug-07 131.85
6-Aug-07 135.25
7-Aug-07 135.03
8-Aug-07 134.01
9-Aug-07 126.39
10-Aug-07 125.00
13-Aug-07 127.79
14-Aug-07 124.03
15-Aug-07 119.90
16-Aug-07 117.05
17-Aug-07 122.06
20-Aug-07 122.22
21-Aug-07 127.57
22-Aug-07 132.51
23-Aug-07 131.07
24-Aug-07 135.30
27-Aug-07 132.25
28-Aug-07 126.82
29-Aug-07 134.08
30-Aug-07 136.25
31-Aug-07 138.48
4-Sep-07 144.16
5-Sep-07 136.76
6-Sep-07 135.01
7-Sep-07 131.77
10-Sep-07 136.71
11-Sep-07 135.49
12-Sep-07 136.85
13-Sep-07 137.20
14-Sep-07 138.81
17-Sep-07 138.41
18-Sep-07 140.92
19-Sep-07 140.77
20-Sep-07 140.31
21-Sep-07 144.15
24-Sep-07 148.28
25-Sep-07 153.18
26-Sep-07 152.77
27-Sep-07 154.50
28-Sep-07 153.47
1-Oct-07 156.34
2-Oct-07 158.45
3-Oct-07 157.92
4-Oct-07 156.24
5-Oct-07 161.45
8-Oct-07 167.91
9-Oct-07 167.86
10-Oct-07 166.79
11-Oct-07 162.23
12-Oct-07 167.25
15-Oct-07 166.98
16-Oct-07 169.58
17-Oct-07 172.75
18-Oct-07 173.50
19-Oct-07 170.42
22-Oct-07 174.36
23-Oct-07 186.16
24-Oct-07 185.93
25-Oct-07 182.78
26-Oct-07 184.70
29-Oct-07 185.09
30-Oct-07 187.00
31-Oct-07 189.95
1-Nov-07 187.44
2-Nov-07 187.87
5-Nov-07 186.18
6-Nov-07 191.79
7-Nov-07 186.30
8-Nov-07 175.47
9-Nov-07 165.37
12-Nov-07 153.76
13-Nov-07 169.96
14-Nov-07 166.11
15-Nov-07 164.30
16-Nov-07 166.39
19-Nov-07 163.95
20-Nov-07 168.85
21-Nov-07 168.46
23-Nov-07 171.54
26-Nov-07 172.54
27-Nov-07 174.81
28-Nov-07 180.22
29-Nov-07 184.29
30-Nov-07 182.22
3-Dec-07 178.86
4-Dec-07 179.81
5-Dec-07 185.50
6-Dec-07 189.95
7-Dec-07 194.30
10-Dec-07 194.21
11-Dec-07 188.54
12-Dec-07 190.86
13-Dec-07 191.83
14-Dec-07 190.39
17-Dec-07 184.40
18-Dec-07 182.98
19-Dec-07 183.12
20-Dec-07 187.21
21-Dec-07 193.91
24-Dec-07 198.80
26-Dec-07 198.95
27-Dec-07 198.57
28-Dec-07 199.83
31-Dec-07 198.08
2-Jan-08 194.84
3-Jan-08 194.93
4-Jan-08 180.05
7-Jan-08 177.64
8-Jan-08 171.25
9-Jan-08 179.40
10-Jan-08 178.02
11-Jan-08 172.69
14-Jan-08 178.78
15-Jan-08 169.04
16-Jan-08 159.64
17-Jan-08 160.89
18-Jan-08 161.36
22-Jan-08 155.64
23-Jan-08 139.07
24-Jan-08 135.60
25-Jan-08 130.01
28-Jan-08 130.01
29-Jan-08 131.54
30-Jan-08 132.18
31-Jan-08 135.36
1-Feb-08 133.75
4-Feb-08 131.65
5-Feb-08 129.36
6-Feb-08 122.00
7-Feb-08 121.24
8-Feb-08 125.48
11-Feb-08 129.45
12-Feb-08 124.86
13-Feb-08 129.40
14-Feb-08 127.46
15-Feb-08 124.63
19-Feb-08 122.18
20-Feb-08 123.82
21-Feb-08 121.54
22-Feb-08 119.46
25-Feb-08 119.74
26-Feb-08 119.15
27-Feb-08 122.96
28-Feb-08 129.91
29-Feb-08 125.02
3-Mar-08 121.73
4-Mar-08 124.62
5-Mar-08 124.49
6-Mar-08 120.93
7-Mar-08 122.25
10-Mar-08 119.69
11-Mar-08 127.35
12-Mar-08 126.03
13-Mar-08 127.94
14-Mar-08 126.61
17-Mar-08 126.73
18-Mar-08 132.82
19-Mar-08 129.67
20-Mar-08 133.27
24-Mar-08 139.53
25-Mar-08 140.98
26-Mar-08 145.06
27-Mar-08 140.25
28-Mar-08 143.01
31-Mar-08 143.50
1-Apr-08 149.53
2-Apr-08 147.49
3-Apr-08 151.61
4-Apr-08 153.08
7-Apr-08 155.89
8-Apr-08 152.84
9-Apr-08 151.44
10-Apr-08 154.55
11-Apr-08 147.14
14-Apr-08 147.78
15-Apr-08 148.38
16-Apr-08 153.70
17-Apr-08 154.49
18-Apr-08 161.04
21-Apr-08 168.16
22-Apr-08 160.20
23-Apr-08 162.89
24-Apr-08 168.94
25-Apr-08 169.73
28-Apr-08 172.24
29-Apr-08 175.05
30-Apr-08 173.95
1-May-08 180.00
2-May-08 180.94
5-May-08 184.73
6-May-08 186.66
7-May-08 182.59
8-May-08 185.06
9-May-08 183.45
12-May-08 188.16
13-May-08 189.96
14-May-08 186.26
15-May-08 189.73
16-May-08 187.62
19-May-08 183.60
20-May-08 185.90
21-May-08 178.19
22-May-08 177.05
23-May-08 181.17
27-May-08 186.43
28-May-08 187.01
29-May-08 186.69
30-May-08 188.75
2-Jun-08 186.10
3-Jun-08 185.37
4-Jun-08 185.19
5-Jun-08 189.43
6-Jun-08 185.64
9-Jun-08 181.61
10-Jun-08 185.64
11-Jun-08 180.81
12-Jun-08 173.26
13-Jun-08 172.37
16-Jun-08 176.84
17-Jun-08 181.43
18-Jun-08 178.75
19-Jun-08 180.90
20-Jun-08 175.27
23-Jun-08 173.16
24-Jun-08 173.25
25-Jun-08 177.39
26-Jun-08 168.26
27-Jun-08 170.09
30-Jun-08 167.44
1-Jul-08 174.68
2-Jul-08 168.18
3-Jul-08 170.12
7-Jul-08 175.16
8-Jul-08 179.55
9-Jul-08 174.25
10-Jul-08 176.63
11-Jul-08 172.58
14-Jul-08 173.88
15-Jul-08 169.64
16-Jul-08 172.81
17-Jul-08 171.81
18-Jul-08 165.15
21-Jul-08 166.29
22-Jul-08 162.02
23-Jul-08 166.26
24-Jul-08 159.03
25-Jul-08 162.12
28-Jul-08 154.40
29-Jul-08 157.08
30-Jul-08 159.88
31-Jul-08 158.95
1-Aug-08 156.66
4-Aug-08 153.23
5-Aug-08 160.64
6-Aug-08 164.19
7-Aug-08 163.57
8-Aug-08 169.55
11-Aug-08 173.56
12-Aug-08 176.73
13-Aug-08 179.30
14-Aug-08 179.32
15-Aug-08 175.74
18-Aug-08 175.39
19-Aug-08 173.53
20-Aug-08 175.84
21-Aug-08 174.29
22-Aug-08 176.79
25-Aug-08 172.55
26-Aug-08 173.64
27-Aug-08 174.67
28-Aug-08 173.74
29-Aug-08 169.53
2-Sep-08 166.19
3-Sep-08 166.96
4-Sep-08 161.22
5-Sep-08 160.18
8-Sep-08 157.92
9-Sep-08 151.68
10-Sep-08 151.61
11-Sep-08 152.65
12-Sep-08 148.94
15-Sep-08 140.36
16-Sep-08 139.88
17-Sep-08 127.83
18-Sep-08 134.09
19-Sep-08 140.91
22-Sep-08 131.05
23-Sep-08 126.84
24-Sep-08 128.71
25-Sep-08 131.93
26-Sep-08 128.24
29-Sep-08 105.26
30-Sep-08 113.66
1-Oct-08 109.12
2-Oct-08 100.10
3-Oct-08 97.07
6-Oct-08 98.14
7-Oct-08 89.16
8-Oct-08 89.79
9-Oct-08 88.74
10-Oct-08 96.80
13-Oct-08 110.26
14-Oct-08 104.08
15-Oct-08 97.95
16-Oct-08 101.89
17-Oct-08 97.40
20-Oct-08 98.44
21-Oct-08 91.49
22-Oct-08 96.87
23-Oct-08 98.23
24-Oct-08 96.38
27-Oct-08 92.09
28-Oct-08 99.91
29-Oct-08 104.55
30-Oct-08 111.04
31-Oct-08 107.59
3-Nov-08 106.96
4-Nov-08 110.99
5-Nov-08 103.30
6-Nov-08 99.10
7-Nov-08 98.24
10-Nov-08 95.88
11-Nov-08 94.77
12-Nov-08 90.12
13-Nov-08 96.44
14-Nov-08 90.24
17-Nov-08 88.14
18-Nov-08 89.91
19-Nov-08 86.29
20-Nov-08 80.49
21-Nov-08 82.58
24-Nov-08 92.95
25-Nov-08 90.80
26-Nov-08 95.00
27-Nov-08 95.00
28-Nov-08 92.67
1-Dec-08 88.93
2-Dec-08 92.47
3-Dec-08 95.90
4-Dec-08 91.41
5-Dec-08 94.00
8-Dec-08 99.72
9-Dec-08 100.06
10-Dec-08 98.21
11-Dec-08 95.00
12-Dec-08 98.27
15-Dec-08 94.75
16-Dec-08 95.43
17-Dec-08 89.16
18-Dec-08 89.43
19-Dec-08 90.00
22-Dec-08 85.74
23-Dec-08 86.38
24-Dec-08 85.04
25-Dec-08 85.04
26-Dec-08 85.81
29-Dec-08 86.61
30-Dec-08 86.29
31-Dec-08 85.35
1-Jan-09 85.35
2-Jan-09 90.75
5-Jan-09 94.58
6-Jan-09 93.02
7-Jan-09 91.01
8-Jan-09 92.70
9-Jan-09 90.58
12-Jan-09 88.66
13-Jan-09 87.71
14-Jan-09 85.33
15-Jan-09 83.38
16-Jan-09 82.33
20-Jan-09 78.20
21-Jan-09 82.83
22-Jan-09 88.36
23-Jan-09 88.36
26-Jan-09 89.64
27-Jan-09 90.73
28-Jan-09 94.20
29-Jan-09 93.00
30-Jan-09 90.13
2-Feb-09 91.51
3-Feb-09 92.98
4-Feb-09 93.55
5-Feb-09 96.46
6-Feb-09 99.72
9-Feb-09 102.51
10-Feb-09 97.83
11-Feb-09 96.82
12-Feb-09 99.27
13-Feb-09 99.16
17-Feb-09 94.53
18-Feb-09 94.37
19-Feb-09 90.64
20-Feb-09 91.20
23-Feb-09 86.95
24-Feb-09 90.25
25-Feb-09 91.16
26-Feb-09 89.19
27-Feb-09 89.31
2-Mar-09 87.94
3-Mar-09 88.37
4-Mar-09 91.17
5-Mar-09 88.84
6-Mar-09 85.30
9-Mar-09 83.11
10-Mar-09 88.63
11-Mar-09 92.68
12-Mar-09 96.35
13-Mar-09 95.93
16-Mar-09 95.42
17-Mar-09 99.66
18-Mar-09 101.52
19-Mar-09 101.62
20-Mar-09 101.59
23-Mar-09 107.66
24-Mar-09 106.50
25-Mar-09 106.49
26-Mar-09 109.87
27-Mar-09 106.85
30-Mar-09 104.49
31-Mar-09 105.12
1-Apr-09 108.69
2-Apr-09 112.71
3-Apr-09 115.99
6-Apr-09 118.45
7-Apr-09 115.00
8-Apr-09 116.32
9-Apr-09 119.57
10-Apr-09 119.57
13-Apr-09 120.22
14-Apr-09 118.31
15-Apr-09 117.64
16-Apr-09 121.45
17-Apr-09 123.42
20-Apr-09 120.50
21-Apr-09 121.76
22-Apr-09 121.51
23-Apr-09 125.40
24-Apr-09 123.90
27-Apr-09 124.73
28-Apr-09 123.90
29-Apr-09 125.14
30-Apr-09 125.83
1-May-09 127.24
4-May-09 132.07
5-May-09 132.71
6-May-09 132.50
7-May-09 129.06
8-May-09 129.19
11-May-09 129.57
12-May-09 124.42
13-May-09 119.49
14-May-09 122.95
15-May-09 122.42
18-May-09 126.65
19-May-09 127.45
20-May-09 125.87
21-May-09 124.18
22-May-09 122.50
26-May-09 130.78
27-May-09 133.05
28-May-09 135.07
29-May-09 135.81
1-Jun-09 139.35
2-Jun-09 139.49
3-Jun-09 140.95
4-Jun-09 143.74
5-Jun-09 144.67
8-Jun-09 143.85
9-Jun-09 142.72
10-Jun-09 140.25
11-Jun-09 139.95
12-Jun-09 136.97
15-Jun-09 136.09
16-Jun-09 136.35
17-Jun-09 135.58
18-Jun-09 135.88
19-Jun-09 139.48
22-Jun-09 137.37
23-Jun-09 134.01
24-Jun-09 136.22
25-Jun-09 139.86
26-Jun-09 142.44
29-Jun-09 141.97
30-Jun-09 142.43
1-Jul-09 142.83
2-Jul-09 140.02
3-Jul-09 140.02
6-Jul-09 138.61
7-Jul-09 135.40
8-Jul-09 137.22
9-Jul-09 136.36
10-Jul-09 138.52
13-Jul-09 142.34
14-Jul-09 142.27
15-Jul-09 146.88
16-Jul-09 147.52
17-Jul-09 151.75
20-Jul-09 152.91
21-Jul-09 151.51
22-Jul-09 156.74
23-Jul-09 157.82
24-Jul-09 159.99
27-Jul-09 160.10
28-Jul-09 160.00
29-Jul-09 160.03
30-Jul-09 162.79
31-Jul-09 163.39
3-Aug-09 166.43
4-Aug-09 165.55
5-Aug-09 165.11
6-Aug-09 163.91
7-Aug-09 165.51
10-Aug-09 164.72
12-Aug-09 165.31
13-Aug-09 168.42
14-Aug-09 166.78
17-Aug-09 159.59
18-Aug-09 164.00
19-Aug-09 164.60
20-Aug-09 166.33
21-Aug-09 169.22
24-Aug-09 169.06
25-Aug-09 169.40
26-Aug-09 167.41
27-Aug-09 169.45
28-Aug-09 170.05
31-Aug-09 168.21
1-Sep-09 165.30
2-Sep-09 165.18
3-Sep-09 166.55
4-Sep-09 170.31
8-Sep-09 172.93
9-Sep-09 171.14
10-Sep-09 172.56
11-Sep-09 172.16
14-Sep-09 173.72
15-Sep-09 175.16
16-Sep-09 181.87
17-Sep-09 184.55
18-Sep-09 185.02
21-Sep-09 184.02
22-Sep-09 184.48
23-Sep-09 185.50
24-Sep-09 183.82
25-Sep-09 182.37
28-Sep-09 186.15
29-Sep-09 185.38
30-Sep-09 185.35
1-Oct-09 180.86
2-Oct-09 184.90
5-Oct-09 186.02
6-Oct-09 190.01
7-Oct-09 190.25
8-Oct-09 189.27
9-Oct-09 190.47
12-Oct-09 190.81
13-Oct-09 190.02
14-Oct-09 191.29
15-Oct-09 190.56
16-Oct-09 188.05
19-Oct-09 189.86
20-Oct-09 198.76
21-Oct-09 204.92
22-Oct-09 205.20
23-Oct-09 203.94
26-Oct-09 202.48
27-Oct-09 197.37
28-Oct-09 192.40
29-Oct-09 196.35
30-Oct-09 188.50
2-Nov-09 189.31
3-Nov-09 188.75
4-Nov-09 190.81
5-Nov-09 194.03
6-Nov-09 194.34
9-Nov-09 201.46
10-Nov-09 202.98
11-Nov-09 203.25
12-Nov-09 201.99
13-Nov-09 204.45
16-Nov-09 206.63
17-Nov-09 207.00
18-Nov-09 205.96
19-Nov-09 200.51
20-Nov-09 199.92
23-Nov-09 205.88
24-Nov-09 204.44
25-Nov-09 204.19
26-Nov-09 204.19
27-Nov-09 200.59
30-Nov-09 199.91
1-Dec-09 196.97
2-Dec-09 196.23
3-Dec-09 196.48
4-Dec-09 193.32
7-Dec-09 188.95
8-Dec-09 189.87
9-Dec-09 197.80
10-Dec-09 196.43
11-Dec-09 194.67
14-Dec-09 196.98
15-Dec-09 194.17
16-Dec-09 195.03
17-Dec-09 191.86
18-Dec-09 195.43
21-Dec-09 198.23
22-Dec-09 200.36
23-Dec-09 202.10
24-Dec-09 209.04
25-Dec-09 209.04
28-Dec-09 211.61
29-Dec-09 209.10
30-Dec-09 211.64
31-Dec-09 210.73
1-Jan-10 210.73
4-Jan-10 214.01
5-Jan-10 214.38
6-Jan-10 210.97
7-Jan-10 210.58
8-Jan-10 211.98
11-Jan-10 210.11
12-Jan-10 207.72
13-Jan-10 210.65
14-Jan-10 209.43
15-Jan-10 205.93
18-Jan-10 205.93
19-Jan-10 215.04
20-Jan-10 211.72
21-Jan-10 208.07
22-Jan-10 197.75
25-Jan-10 203.08
26-Jan-10 205.94
27-Jan-10 207.88
28-Jan-10 199.29
29-Jan-10 192.06
1-Feb-10 194.73
2-Feb-10 195.86
3-Feb-10 199.23
4-Feb-10 192.05
5-Feb-10 195.46
8-Feb-10 194.12
9-Feb-10 196.19
10-Feb-10 195.12
11-Feb-10 198.67
12-Feb-10 200.38
15-Feb-10 200.38
16-Feb-10 203.40
17-Feb-10 202.55
18-Feb-10 202.93
19-Feb-10 201.67
22-Feb-10 200.42
23-Feb-10 197.06
24-Feb-10 200.66
25-Feb-10 202.00
26-Feb-10 204.62
1-Mar-10 208.99
2-Mar-10 208.85
3-Mar-10 209.33
4-Mar-10 210.71
5-Mar-10 218.95
8-Mar-10 219.08
9-Mar-10 223.02
10-Mar-10 224.84
11-Mar-10 225.50
12-Mar-10 226.60
15-Mar-10 223.84
16-Mar-10 224.45
17-Mar-10 224.12
18-Mar-10 224.65
19-Mar-10 222.25
22-Mar-10 224.75
23-Mar-10 228.36
24-Mar-10 229.37
25-Mar-10 226.65
26-Mar-10 230.90
29-Mar-10 232.39
30-Mar-10 235.84
31-Mar-10 235.00
1-Apr-10 235.97
2-Apr-10 235.97
5-Apr-10 238.49
6-Apr-10 239.54
7-Apr-10 240.60
8-Apr-10 239.95
9-Apr-10 241.79
12-Apr-10 242.29
13-Apr-10 242.43
14-Apr-10 245.69
15-Apr-10 248.92
16-Apr-10 247.40
19-Apr-10 247.07
20-Apr-10 244.59
21-Apr-10 259.22
22-Apr-10 266.47
23-Apr-10 270.83
26-Apr-10 269.50
27-Apr-10 262.04
28-Apr-10 261.60
29-Apr-10 268.64
30-Apr-10 261.09
3-May-10 266.35
4-May-10 258.68
5-May-10 255.98
6-May-10 246.25
7-May-10 235.86
10-May-10 253.99
11-May-10 256.52
12-May-10 262.09
13-May-10 258.36
14-May-10 253.82
17-May-10 254.22
18-May-10 252.36
19-May-10 248.34
20-May-10 237.76
21-May-10 242.32
24-May-10 246.76
25-May-10 245.22
26-May-10 244.11
27-May-10 253.35
28-May-10 256.88
31-May-10 256.88
1-Jun-10 260.83
2-Jun-10 263.95
3-Jun-10 263.12
4-Jun-10 255.96
7-Jun-10 250.94
8-Jun-10 249.33
9-Jun-10 243.20
10-Jun-10 250.51
11-Jun-10 253.51
14-Jun-10 254.28
15-Jun-10 259.69
16-Jun-10 267.25
17-Jun-10 271.87
18-Jun-10 274.07
21-Jun-10 270.17
22-Jun-10 273.85
23-Jun-10 270.97
24-Jun-10 269.00
25-Jun-10 266.70
28-Jun-10 268.30
29-Jun-10 256.17
30-Jun-10 251.53
1-Jul-10 248.48
2-Jul-10 246.94
5-Jul-10 246.94
6-Jul-10 248.63
7-Jul-10 258.66
8-Jul-10 258.09
9-Jul-10 259.62
12-Jul-10 257.28
13-Jul-10 251.80
14-Jul-10 252.73
15-Jul-10 251.45
16-Jul-10 249.90
19-Jul-10 245.58
20-Jul-10 251.89
21-Jul-10 254.24
22-Jul-10 259.02
23-Jul-10 259.94
26-Jul-10 259.28
27-Jul-10 264.08
28-Jul-10 260.96
29-Jul-10 258.11
30-Jul-10 257.25
2-Aug-10 261.85
3-Aug-10 261.93
4-Aug-10 262.98
5-Aug-10 261.70
6-Aug-10 260.09
9-Aug-10 261.75
10-Aug-10 259.41
11-Aug-10 250.19
12-Aug-10 251.79
13-Aug-10 249.10
16-Aug-10 247.64
17-Aug-10 251.97
18-Aug-10 253.07
19-Aug-10 249.88
20-Aug-10 249.64
23-Aug-10 245.80
24-Aug-10 239.93
25-Aug-10 242.89
26-Aug-10 240.28
27-Aug-10 241.62
30-Aug-10 242.50
31-Aug-10 243.10
1-Sep-10 250.33
2-Sep-10 252.17
3-Sep-10 258.77
6-Sep-10 258.77
7-Sep-10 257.81
8-Sep-10 262.92
9-Sep-10 263.07
10-Sep-10 263.41
13-Sep-10 267.04
14-Sep-10 268.06
15-Sep-10 270.22
16-Sep-10 276.57
17-Sep-10 275.37
20-Sep-10 283.23
21-Sep-10 283.77
22-Sep-10 287.75
23-Sep-10 288.92
24-Sep-10 292.32
27-Sep-10 291.16
28-Sep-10 286.86
29-Sep-10 287.37
30-Sep-10 283.75
1-Oct-10 282.52
4-Oct-10 278.64
5-Oct-10 288.94
6-Oct-10 289.19
7-Oct-10 289.22
8-Oct-10 294.07
11-Oct-10 295.36
12-Oct-10 298.54
13-Oct-10 300.14
14-Oct-10 302.31
15-Oct-10 314.74
18-Oct-10 318.00
19-Oct-10 309.49
20-Oct-10 310.53
21-Oct-10 309.52
22-Oct-10 307.47
25-Oct-10 308.84
26-Oct-10 308.05
27-Oct-10 307.83
28-Oct-10 305.24
29-Oct-10 300.98
1-Nov-10 304.18
2-Nov-10 309.36
3-Nov-10 312.80
4-Nov-10 318.27
5-Nov-10 317.13
8-Nov-10 318.62
9-Nov-10 316.08
10-Nov-10 318.03
11-Nov-10 316.66
12-Nov-10 308.03
15-Nov-10 307.04
16-Nov-10 301.59
17-Nov-10 300.50
18-Nov-10 308.43
19-Nov-10 306.73
22-Nov-10 313.36
23-Nov-10 308.73
24-Nov-10 314.80
26-Nov-10 315.00
29-Nov-10 316.87
30-Nov-10 311.15
1-Dec-10 316.40
2-Dec-10 318.15
3-Dec-10 317.44
6-Dec-10 320.15
7-Dec-10 318.21
8-Dec-10 321.01
9-Dec-10 319.76
10-Dec-10 320.56
13-Dec-10 321.67
14-Dec-10 320.29
15-Dec-10 320.36
16-Dec-10 321.25
17-Dec-10 320.61
20-Dec-10 322.21
21-Dec-10 324.20
22-Dec-10 325.16
23-Dec-10 323.60
27-Dec-10 324.68
28-Dec-10 325.47
29-Dec-10 325.29
30-Dec-10 323.66
31-Dec-10 322.56
3-Jan-11 329.57
4-Jan-11 331.29
5-Jan-11 334.00
6-Jan-11 333.73
7-Jan-11 336.12
10-Jan-11 342.46
11-Jan-11 341.64
12-Jan-11 344.42
13-Jan-11 345.68
14-Jan-11 348.48
18-Jan-11 340.65
19-Jan-11 338.84
20-Jan-11 332.68
21-Jan-11 326.72
24-Jan-11 337.45
25-Jan-11 341.40
26-Jan-11 343.85
27-Jan-11 343.21
28-Jan-11 336.10
31-Jan-11 339.32
1-Feb-11 345.03
2-Feb-11 344.32
3-Feb-11 343.44
4-Feb-11 346.50
7-Feb-11 351.88
8-Feb-11 355.20
9-Feb-11 358.16
10-Feb-11 354.54
11-Feb-11 356.85
14-Feb-11 359.18
15-Feb-11 359.90
16-Feb-11 363.13
17-Feb-11 358.30
18-Feb-11 350.56
22-Feb-11 338.61
23-Feb-11 342.62
24-Feb-11 342.88
25-Feb-11 348.16
28-Feb-11 353.21
1-Mar-11 349.31
2-Mar-11 352.12
3-Mar-11 359.56
4-Mar-11 360.00
7-Mar-11 355.36
8-Mar-11 355.76
9-Mar-11 352.47
10-Mar-11 346.67
11-Mar-11 351.99
14-Mar-11 353.56
15-Mar-11 345.43
16-Mar-11 330.01
17-Mar-11 334.64
18-Mar-11 330.67
21-Mar-11 339.30
22-Mar-11 341.20
23-Mar-11 339.19
24-Mar-11 344.97
25-Mar-11 351.54
28-Mar-11 350.44
29-Mar-11 350.96
30-Mar-11 348.63
31-Mar-11 348.51
1-Apr-11 344.56
4-Apr-11 341.19
5-Apr-11 338.89
6-Apr-11 338.04
7-Apr-11 338.08
8-Apr-11 335.06
11-Apr-11 330.80
12-Apr-11 332.40
13-Apr-11 336.13
14-Apr-11 332.42
15-Apr-11 327.46
18-Apr-11 331.85
19-Apr-11 337.86
20-Apr-11 342.41
21-Apr-11 350.70
25-Apr-11 353.01
26-Apr-11 350.42
27-Apr-11 350.15
28-Apr-11 346.75
29-Apr-11 350.13
2-May-11 346.28
3-May-11 348.20
4-May-11 349.57
5-May-11 346.75
6-May-11 346.66
9-May-11 347.60
10-May-11 349.45
11-May-11 347.23
12-May-11 346.57
13-May-11 340.50
16-May-11 333.30
17-May-11 336.14
18-May-11 339.87
19-May-11 340.53
20-May-11 335.22
23-May-11 334.40
24-May-11 332.19
25-May-11 336.78
26-May-11 335.00
27-May-11 337.41
31-May-11 347.83
1-Jun-11 345.51
2-Jun-11 346.10
3-Jun-11 343.44
6-Jun-11 338.04
7-Jun-11 332.04
8-Jun-11 332.24
9-Jun-11 331.49
10-Jun-11 325.90
13-Jun-11 326.60
14-Jun-11 332.44
15-Jun-11 326.75
16-Jun-11 325.16
17-Jun-11 320.26
20-Jun-11 315.32
21-Jun-11 325.30
22-Jun-11 322.61
23-Jun-11 331.23
24-Jun-11 326.35
27-Jun-11 332.04
28-Jun-11 335.26
29-Jun-11 334.04
30-Jun-11 335.67
1-Jul-11 343.26
5-Jul-11 349.43
6-Jul-11 351.76
7-Jul-11 357.20
8-Jul-11 359.71
11-Jul-11 354.00
12-Jul-11 353.75
13-Jul-11 358.02
14-Jul-11 357.77
15-Jul-11 364.92
18-Jul-11 373.80
19-Jul-11 376.85
20-Jul-11 386.90
21-Jul-11 387.29
22-Jul-11 393.30
25-Jul-11 398.50
26-Jul-11 403.41
27-Jul-11 392.59
28-Jul-11 391.82
29-Jul-11 390.48
1-Aug-11 396.75
2-Aug-11 388.91
3-Aug-11 392.57
4-Aug-11 377.37
5-Aug-11 373.62
8-Aug-11 353.21
9-Aug-11 374.01
10-Aug-11 363.69
11-Aug-11 373.70
12-Aug-11 376.99
15-Aug-11 383.41
16-Aug-11 380.48
17-Aug-11 380.44
18-Aug-11 366.05
19-Aug-11 356.03
22-Aug-11 356.44
23-Aug-11 373.60
24-Aug-11 376.18
25-Aug-11 373.72
26-Aug-11 383.58
29-Aug-11 389.97
30-Aug-11 389.99
31-Aug-11 384.83
1-Sep-11 381.03
2-Sep-11 374.05
6-Sep-11 379.74
7-Sep-11 383.93
8-Sep-11 384.14
9-Sep-11 377.48
12-Sep-11 379.94
13-Sep-11 384.62
14-Sep-11 389.30
15-Sep-11 392.96
16-Sep-11 400.50
19-Sep-11 411.63
20-Sep-11 413.45
21-Sep-11 412.14
22-Sep-11 401.82
23-Sep-11 404.30
26-Sep-11 403.17
27-Sep-11 399.26
28-Sep-11 397.01
29-Sep-11 390.57
30-Sep-11 381.32
3-Oct-11 374.60
4-Oct-11 372.50
5-Oct-11 378.25
6-Oct-11 377.37
7-Oct-11 369.80
10-Oct-11 388.81
11-Oct-11 400.29
12-Oct-11 402.19
13-Oct-11 408.43
14-Oct-11 422.00
17-Oct-11 419.99
18-Oct-11 422.24
19-Oct-11 398.62
20-Oct-11 395.31
21-Oct-11 392.87
24-Oct-11 405.77
25-Oct-11 397.77
26-Oct-11 400.60
27-Oct-11 404.69
28-Oct-11 404.95
31-Oct-11 404.78
1-Nov-11 396.51
2-Nov-11 397.41
3-Nov-11 403.07
4-Nov-11 400.24
7-Nov-11 399.73
8-Nov-11 406.23
9-Nov-11 395.28
10-Nov-11 385.22
11-Nov-11 384.62
14-Nov-11 379.26
15-Nov-11 388.83
16-Nov-11 384.77
17-Nov-11 377.41
18-Nov-11 374.94
21-Nov-11 369.01
22-Nov-11 376.51
23-Nov-11 366.99
25-Nov-11 363.57
28-Nov-11 376.12
29-Nov-11 373.20
30-Nov-11 382.20
1-Dec-11 387.93
2-Dec-11 389.70
5-Dec-11 393.01
6-Dec-11 390.95
7-Dec-11 389.09
8-Dec-11 390.66
9-Dec-11 393.62
12-Dec-11 391.84
13-Dec-11 388.81
14-Dec-11 380.19
15-Dec-11 378.94
16-Dec-11 381.02
19-Dec-11 382.21
20-Dec-11 395.95
21-Dec-11 396.44
22-Dec-11 398.55
23-Dec-11 403.43
27-Dec-11 406.53
28-Dec-11 402.64
29-Dec-11 405.12
30-Dec-11 405.00
如何处理双击事件，并在该日期提取折线图的日期和值 - 当双击该行时？
答案 0 :(得分：2)
您可以在d3.tsv回调的末尾（行.attr("d", line);之后）添加这样的代码：
// Build a function to return the index where a given date would be inserted
// into the sorted data array.
var bisectDate = d3.bisector(function(d) { return d.date; }).left;
// Build a function to scale the mouse x position into the width of the chart.
var scaleMouse = d3.scaleLinear().range([0, width]).domain([margin.left, margin.left + width]);
// Add a double click event listener to the svg element.
svg.on("dblclick", function() {
// Get the mouse position relative to the svg element. The return is of the
// form [x, y].
var mouse = d3.mouse(this);
// If the mouse is outside of the chart area then return.
if (mouse[0] < margin.left || mouse[0] > margin.left + width || mouse[1] < margin.top || mouse[1] > margin.top + height) return;
// x.invert is the inverse of the x function defined above. It is a function
// that takes an x coordinate and returns a date. Here we scale the mouse
// position into the chart and then do the inversion.
var x0 = x.invert(scaleMouse(mouse[0])),
// Use the date from x.invert and the bisectData fn built above to get an
// index into the data array.
i = bisectDate(data, x0, 1),
// Now get the actual data points around the index.
d0 = data[i - 1],
d1 = data[i],
// And choose the one nearer to the date associated with where the mouse is.
d = d1 != null && x0 - d0.date > d1.date - x0 ? d1 : d0;
// Show the result.
alert(d.date + "," + d.close);
});
此代码捕获svg元素上的双击事件，但忽略任何落在图表区域边界框之外的事件。然后，它使用鼠标的x位置查找最近的数据点，并在警告弹出窗口中显示结果。