比较D3.js两个时间对象 [英] Compare two time objects in D3.js
问题描述
在D3.js我目前正在基于数据数组来填充一个空数组(数组包含每5分钟后只时间戳)中包含的时间或没有。如果数据数组包含的时候,它应该复制的价值,否则无效。但是,当我试图比较两个对象时其工作不正常。
以下是code(当前code未复制值,但印刷使调试容易):
VAR数据= [{数值指明MyTime:2015-12-01T23:10:00.000Z,价值:64},
{数值指明MyTime:2015-12-01T23:15:00.000Z,价值:67},
{数值指明MyTime:2015-12-01T23:20:00.000Z,价值:70},
{数值指明MyTime:2015-12-01T23:25:00.000Z,价值:64},
{数值指明MyTime:2015-12-01T23:30:00.000Z,价值:72},
{数值指明MyTime:2015-12-01T23:35:00.000Z,价值:75},
{数值指明MyTime:2015-12-01T23:40:00.000Z,价值:71},
{数值指明MyTime:2015-12-01T23:45:00.000Z,价值:80},
{数值指明MyTime:2015-12-02T00:00:00.000Z,价值:80},
{数值指明MyTime:2015-12-02T00:05:00.000Z,价值:85}
];VAR parseDate = d3.time.format(%Y-%M-%胸苷%H:%M:%S.%LZ)。分析;data.forEach(函数(D){
d.mytime = parseDate(d.mytime);
});变种act_data = []; VAR x_extent = d3.extent(数据,功能(D){
返回D ['数值指明MyTime']}); time_arr = d3.time.minute.range(x_extent [0],x_extent [1],5);
对(在time_arr VAR键){
VAR温度;
TEMP =包含(数据,time_arr [关键],'数值指明MyTime');
}
函数包含(数据,值,变量)
{
VAR I = data.length;
当我 - ){ 如果(数据[I] [变量] ===值)
{
的console.log('发现');
返回我;
}
}
返回false;
}
输出应该是这样的:
数据= [{数值指明MyTime:2015-12-01T23:10:00.000Z,价值:64},
{数值指明MyTime:2015-12-01T23:15:00.000Z,价值:67},
{数值指明MyTime:2015-12-01T23:20:00.000Z,价值:70},
{数值指明MyTime:2015-12-01T23:25:00.000Z,价值:64},
{数值指明MyTime:2015-12-01T23:30:00.000Z,价值:72},
{数值指明MyTime:2015-12-01T23:35:00.000Z,价值:75},
{数值指明MyTime:2015-12-01T23:40:00.000Z,价值:71},
{数值指明MyTime:2015-12-01T23:45:00.000Z,价值:80},
{数值指明MyTime:2015-12-01T23:50:00.000Z,价值:空}
{数值指明MyTime:2015-12-01T23:55:00.000Z,价值:空}
{数值指明MyTime:2015-12-02T00:00:00.000Z,价值:80},
{数值指明MyTime:2015-12-02T00:05:00.000Z,价值:85}
];
您可以使用
-
d3.time.format
的解析和格式化日期 -
d3.extent
一>,以确定您的时间戳的边界 -
d3.time.scale
来生成输出你想要的蜱 - 和
d3.map
散列输入,并确定是否存在一个值
这给了我们
VAR数据= [];//解析和格式化
VAR TIMEFORMAT = d3.time.format(%Y-%M-%胸苷%H:%M:%S.%LZ);//范围上操作
VAR程度= d3.extent(数据,功能(D){
返回timeformat.parse(d.mytime);
});//规模再presenting时间戳
VAR规模= d3.time.scale()
。域(程度)//边界
.ticks(d3.time.minute,5); //每隔5分钟//容易,以确定是否存在一个值
VAR散列= d3.map(数据,功能(D){返回d.mytime;});//或者如果你的版本< 3.5
/ *
变种散列= d3.map();
data.forEach(函数(D){
hashed.set(d.mytime,D);
});
* /
//变换尺度成所需的输出
VAR解析度= scale.map(功能(T){
VAR英尺= TIMEFORMAT(T);
返回{
数值指明MyTime:FT,
值:(hashed.has(英尺))? hashed.get(英尺).value的:空
};
});
和演示 http://jsfiddle.net/nikoshr/qxcLry8z/
VAR数据= [\r
{数值指明MyTime:2015-12-01T23:10:00.000Z,价值:64},\r
{数值指明MyTime:2015-12-01T23:15:00.000Z,价值:67},\r
{数值指明MyTime:2015-12-01T23:20:00.000Z,价值:70},\r
{数值指明MyTime:2015-12-01T23:25:00.000Z,价值:64},\r
{数值指明MyTime:2015-12-01T23:30:00.000Z,价值:72},\r
{数值指明MyTime:2015-12-01T23:35:00.000Z,价值:75},\r
{数值指明MyTime:2015-12-01T23:40:00.000Z,价值:71},\r
{数值指明MyTime:2015-12-01T23:45:00.000Z,价值:80},\r
{数值指明MyTime:2015-12-02T00:00:00.000Z,价值:80},\r
{数值指明MyTime:2015-12-02T00:05:00.000Z,价值:85}\r
];\r
\r
\r
VAR TIMEFORMAT = d3.time.format(%Y-%M-%胸苷%H:%M:%S.%LZ);\r
\r
VAR程度= d3.extent(数据,功能(D){\r
返回timeformat.parse(d.mytime);\r
});\r
\r
VAR规模= d3.time.scale()\r
。域(程度上)\r
.ticks(d3.time.minute,5);\r
\r
变种散列= d3.map();\r
data.forEach(函数(D){\r
hashed.set(d.mytime,D);\r
});\r
\r
VAR解析度= scale.map(功能(T){\r
VAR英尺= TIMEFORMAT(T);\r
返回{\r
数值指明MyTime:FT,\r
值:(hashed.has(英尺))? hashed.get(英尺).value的:空\r
};\r
});\r
\r
变量$表= $('<表>< /表>');\r
res.forEach(函数(D){\r
$table.append('<tr><td>'+d.mytime+'</td><td>'+d.value+'</td></tr>')\r
});\r
$(身体)追加($表)。\r
\r
&LT;脚本SRC =https://ajax.googleapis.com/ajax /libs/jquery/2.1.1/jquery.min.js\"></script>\r
&LT;脚本SRC =https://cdnjs.cloudflare.com/ajax/libs/d3/3.4.11/d3.min.js&GT;&LT; / SCRIPT&GT;
\r
In D3.js i am currently trying to populate an empty array (array contains only time stamp after every 5 minutes) based on data array contains that time or not . If data array contains the time, it should copy the value otherwise null. But when i am trying to compare the two time objects its not working correctly.
Following is the code (the current code is not copying values but printing to make debugging easier):
var data = [{"mytime": "2015-12-01T23:10:00.000Z", "value": 64},
{"mytime": "2015-12-01T23:15:00.000Z", "value": 67},
{"mytime": "2015-12-01T23:20:00.000Z", "value": 70},
{"mytime": "2015-12-01T23:25:00.000Z", "value": 64},
{"mytime": "2015-12-01T23:30:00.000Z", "value": 72},
{"mytime": "2015-12-01T23:35:00.000Z", "value": 75},
{"mytime": "2015-12-01T23:40:00.000Z", "value": 71},
{"mytime": "2015-12-01T23:45:00.000Z", "value": 80},
{"mytime": "2015-12-02T00:00:00.000Z", "value": 80},
{"mytime": "2015-12-02T00:05:00.000Z", "value": 85}
];
var parseDate = d3.time.format("%Y-%m-%dT%H:%M:%S.%LZ").parse;
data.forEach(function(d) {
d.mytime = parseDate(d.mytime);
});
var act_data = [];
var x_extent = d3.extent(data, function(d){
return d['mytime']});
time_arr = d3.time.minute.range(x_extent[0],x_extent[1],5);
for(var key in time_arr){
var temp;
temp = contains(data,time_arr[key],'mytime');
}
function contains(data,value,variable)
{
var i =data.length;
while(i--){
if (data[i][variable] === value)
{
console.log('found');
return i;
}
}
return false;
}
Output should be this:
data = [{"mytime": "2015-12-01T23:10:00.000Z", "value": 64},
{"mytime": "2015-12-01T23:15:00.000Z", "value": 67},
{"mytime": "2015-12-01T23:20:00.000Z", "value": 70},
{"mytime": "2015-12-01T23:25:00.000Z", "value": 64},
{"mytime": "2015-12-01T23:30:00.000Z", "value": 72},
{"mytime": "2015-12-01T23:35:00.000Z", "value": 75},
{"mytime": "2015-12-01T23:40:00.000Z", "value": 71},
{"mytime": "2015-12-01T23:45:00.000Z", "value": 80},
{"mytime": "2015-12-01T23:50:00.000Z", "value": null},
{"mytime": "2015-12-01T23:55:00.000Z", "value": null},
{"mytime": "2015-12-02T00:00:00.000Z", "value": 80},
{"mytime": "2015-12-02T00:05:00.000Z", "value": 85}
];
You can use
d3.time.format
to parse and format your datesd3.extent
to determine the boundaries of your timestampsd3.time.scale
to generate the ticks you want to output- and
d3.map
to hash your input and determine if a value exists
This gives us
var data = [...];
// for parsing and formatting
var timeformat = d3.time.format("%Y-%m-%dT%H:%M:%S.%LZ");
// range to operate on
var extent = d3.extent(data, function(d){
return timeformat.parse(d.mytime);
});
// scale representing the time stamps
var scale = d3.time.scale()
.domain(extent) // the boundaries
.ticks(d3.time.minute, 5); // 5 minutes intervals
// easier to determine if a value exists
var hashed = d3.map(data, function(d) { return d.mytime; });
// or if your version < 3.5
/*
var hashed = d3.map();
data.forEach(function(d) {
hashed.set(d.mytime, d);
});
*/
// transforms the scale into the desired output
var res = scale.map(function(t) {
var ft = timeformat(t);
return {
mytime: ft,
value: (hashed.has(ft)) ? hashed.get(ft).value : null
};
});
And a demo http://jsfiddle.net/nikoshr/qxcLry8z/
var data = [
{"mytime": "2015-12-01T23:10:00.000Z", "value": 64},
{"mytime": "2015-12-01T23:15:00.000Z", "value": 67},
{"mytime": "2015-12-01T23:20:00.000Z", "value": 70},
{"mytime": "2015-12-01T23:25:00.000Z", "value": 64},
{"mytime": "2015-12-01T23:30:00.000Z", "value": 72},
{"mytime": "2015-12-01T23:35:00.000Z", "value": 75},
{"mytime": "2015-12-01T23:40:00.000Z", "value": 71},
{"mytime": "2015-12-01T23:45:00.000Z", "value": 80},
{"mytime": "2015-12-02T00:00:00.000Z", "value": 80},
{"mytime": "2015-12-02T00:05:00.000Z", "value": 85}
];
var timeformat = d3.time.format("%Y-%m-%dT%H:%M:%S.%LZ");
var extent = d3.extent(data, function(d){
return timeformat.parse(d.mytime);
});
var scale = d3.time.scale()
.domain(extent)
.ticks(d3.time.minute, 5);
var hashed = d3.map();
data.forEach(function(d) {
hashed.set(d.mytime, d);
});
var res = scale.map(function(t) {
var ft = timeformat(t);
return {
mytime: ft,
value: (hashed.has(ft)) ? hashed.get(ft).value : null
};
});
var $table = $('<table></table>');
res.forEach(function(d) {
$table.append('<tr><td>'+d.mytime+'</td><td>'+d.value+'</td></tr>')
});
$('body').append($table);
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/d3/3.4.11/d3.min.js"></script>
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