用时间刻度在x轴和line之间添加空格 [英] Add space between x-axis and line with time scale

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本文介绍了用时间刻度在x轴和line之间添加空格的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!

问题描述

我使用下面的示例。

HTML -

 < div id =chart-holder>< / div> 

CSS -

  .chart-holder {
position:relative;
font-family:Helvetica,sans-serif;
}

。图表提示{
display:none;
位置:绝对;
min-width:70px;
top:0px;
left:0px;
padding:3px 5px;
background:rgba(0,0,0,0.8);
颜色:#fff;
font-size:.8em;
text-shadow:none;
text-align:center;
z-index:10500;
border-radius:3px;
}

.v {
display:block;
font-size:1.2em;
}

路径{
stroke:#0da9c0;
stroke-width:2;
fill:none;
}

path.domain {
stroke:#aaa;
stroke-width:1;
}

行{
stroke:#aaa;
}

text {
font-family:Arial;
font-size:9pt;
填写:#555;
}

circle {
cursor:pointer;

Javascript -

  var data = [[2013-01-24 06:38:02.235191,52],[2013-01-23 06:38:02.235310 ,54],[2013-01-22 06:38:02.235330,45],[2013-01-21 06:38:02.235346,53]],
maxValue = d3.max数据,函数(d){return d [1];}),
margin = {top:20,right:20,bottom:50,left:50},
width = 500 - margin。 left - margin.right,
height = 300 - margin.top - margin.bottom,
svg,x,y,xAxis,yAxis,line;
$ b $ .each(data,function(index,val){
val [0] = new Date(val [0]);
});

x = d3.time.scale()
.range([0,width])

y = d3.scale.linear()
。域([0,maxValue])
.range([height,0]);

xAxis = d3.svg.axis()
.scale(x)
.tickSize(4,2,0)
.ticks(d3.time。天,1)
.tickFormat(d3.time.format(%m /%d))
.orient(bottom);

yAxis = d3.svg.axis()
.scale(y)
// .ticks(5)
// .tickValues([0,maxValue * 0.25,maxValue * 0.5,maxValue * 0.75,maxValue])
.tickSize(4,2,0)
.orient(left);

line = d3.svg.line()
.x(function(d){return x(d [0]);})
.y(function(d ){return y(d [1]);});

svg = d3.select(#chart-holder)。append(svg)
.attr(width,width + margin.left + margin.right)
.attr(height,height + margin.top + margin.bottom)
.append(g)
.attr(transform,translate(+ margin.left +,+ margin.top +));

x.domain(d3.extent(data,function(d){return d [0];})); $ d $ b y.domain([d3.min(data,function(d){return d [1];}) - 1,maxValue]);

svg.append(g)
.attr(class,x axis)
.attr(transform,translate(0,+ ();}
.call(xAxis)
.selectAll(text)
.attr(transform,function(d){
returnrotate( -60)translate(+ -this.getBBox()。height * 1.7 +,+
-this.getBBox()。width / 4 +);
});

svg.append(g)
.attr(class,y axis)
.call(yAxis);
// .append(text)
// .attr(transform,rotate(-90))
// .attr(y,6)
// .attr(dy,.71em)
// .style(text-anchor,end)
// .text(Engagement);

svg.append(path)
.datum(data)
.attr(class,line)
.attr(d ,线);

svg
.selectAll(circle)
.data(data)
.enter()。append(circle)
.attr (fill,#0b8da0)
.attr(r,3.5)
.attr(cx,function(d){return x(d [0]);})
.attr(cy,function(d){return y(d [1]);})
.on(mouseover,function(d){showData(this,d); })
.on(mouseout,function(){hideData(this);});

function showData(obj,d){
var coord = d3.mouse(obj);
var chartTip = d3.select(。chart-tip);
var format = d3.time.format(%b%d,%Y);

//放大圆
d3.select(obj)
.attr('r',5);

//现在我们只需将图表提示放在鼠标所在位置
chartTip.style(left,(coord [0] + 60)+px);
chartTip.style(top,(coord [1] + 10)+px);
$(。chart-tip)。html('< span class =v>'+ d [1] +'< / span>'+ format(d [0])) ;
$(。chart-tip)。fadeIn(100);


函数hideData(obj){
//放大圆
d3.select(obj)
.attr('r',3.5) ;
$(。chart-tip)。fadeOut(100);

$ b $('#chart-holder')。append($('< div />',{
'class':'chart-tip'
}));

这里是小提琴

http://jsfiddle.net/murli2308/n7Vmr/12/



如果我使用序数比例或线性比例,我可以在轴和线之间添加空格。但是,当我使用时间刻度时,我无法在轴和线之间添加空间。



我试过

  x = d3.time.scale() 
.range([0,width]);

无效。

解决方案

x.domain 是用户空间到像素空间映射的用户空间侧。在您的代码中,您将域设置为:

  x.domain(d3.extent(data,function(d){return d [0]  -  1;})); 

在我的最小时间开始我的x轴减1毫秒。



如果你想在行前/后添加一些空格。尝试:

$ $ p $ $ $ $ $ $ $ $ $ $ ] .getTime() - 1.8e + 7;}),
d3.max(data,function(d){return d [0] .getTime()+ 1.8e + 7;})
]);

在我的最短日期前5小时开始我的x轴并在我的最长日期后5小时停止。



更新了小提琴



EDITS



只需使用基于百分比的方案,小时数与您当前的数据):

  var minDate = d3.min(data,function(d){return d [0] .getTime();}),
maxDate = d3.max(data,function(d){return d [0] .getTime();}),
padding =(maxDate - minDate)* 0.05;

x.domain([minDate - padding,maxDate + padding]);

更新小提琴


I am using an example below.

HTML-

<div id="chart-holder"></div>

CSS-

.chart-holder {
   position: relative;
   font-family: Helvetica, sans-serif;
}

.chart-tip {
   display: none;
   position: absolute;
   min-width: 70px;
   top: 0px;
   left: 0px;
   padding: 3px 5px;
   background: rgba(0, 0, 0, 0.8);
   color: #fff;
   font-size: .8em;
   text-shadow: none;
   text-align: center;
   z-index: 10500;
   border-radius: 3px;
}

.v {
   display: block;
   font-size: 1.2em;
 }

path {
   stroke: #0da9c0;
   stroke-width: 2;
   fill: none;
}

path.domain {
   stroke: #aaa;
   stroke-width: 1;
}

line {
   stroke: #aaa;
}

text {
    font-family: Arial;
    font-size: 9pt;
    fill: #555;
}

circle {
   cursor: pointer;
}

Javascript-

var data     = [["2013-01-24 06:38:02.235191", 52], ["2013-01-23 06:38:02.235310", 54], ["2013-01-22 06:38:02.235330", 45], ["2013-01-21 06:38:02.235346", 53]],
  maxValue = d3.max(data, function (d) { return d[1]; }),
  margin   = {top: 20, right: 20, bottom: 50, left: 50},
  width    = 500 - margin.left - margin.right,
  height   = 300 - margin.top - margin.bottom,
  svg, x, y, xAxis, yAxis, line;

$.each(data, function(index, val) {
    val[0] = new Date(val[0]);
  });

x = d3.time.scale()
  .range([0, width])

y = d3.scale.linear()
  .domain([0, maxValue])
  .range([height, 0]);

xAxis = d3.svg.axis()
  .scale(x)
  .tickSize(4, 2, 0)
  .ticks(d3.time.days, 1)
  .tickFormat(d3.time.format("%m/%d"))
  .orient("bottom");

yAxis = d3.svg.axis()
  .scale(y)
  // .ticks(5)
  // .tickValues([0, maxValue * 0.25, maxValue * 0.5, maxValue * 0.75, maxValue])
  .tickSize(4, 2, 0)
  .orient("left");

line = d3.svg.line()
  .x(function(d) { return x(d[0]); })
  .y(function(d) { return y(d[1]); });

svg = d3.select("#chart-holder").append("svg")
  .attr("width", width + margin.left + margin.right)
  .attr("height", height + margin.top + margin.bottom)
.append("g")
  .attr("transform", "translate(" + margin.left + "," + margin.top + ")");

x.domain(d3.extent(data, function(d) { return d[0]; }));
y.domain([d3.min(data, function (d) { return d[1]; })-1, maxValue]);

svg.append("g")
  .attr("class", "x axis")
  .attr("transform", "translate(0," + height + ")")
  .call(xAxis)
  .selectAll("text")
    .attr("transform", function(d) {
      return "rotate(-60)translate(" + -this.getBBox().height * 1.7 + "," +
        -this.getBBox().width/4 + ")";
    });

svg.append("g")
  .attr("class", "y axis")
  .call(yAxis);
// .append("text")
//   .attr("transform", "rotate(-90)")
//   .attr("y", 6)
//   .attr("dy", ".71em")
//   .style("text-anchor", "end")
//   .text("Engagement");

svg.append("path")
  .datum(data)
  .attr("class", "line")
  .attr("d", line);

svg
 .selectAll("circle")
 .data(data)
 .enter().append("circle")
 .attr("fill", "#0b8da0")
 .attr("r", 3.5)
 .attr("cx", function(d) { return x(d[0]); })
 .attr("cy", function(d) { return y(d[1]); })
 .on("mouseover", function(d) { showData(this, d);})
 .on("mouseout", function() { hideData(this);});

 function showData(obj, d) {
  var coord = d3.mouse(obj);
  var chartTip = d3.select(".chart-tip");
  var format = d3.time.format("%b %d, %Y");

  // enlarge circle
  d3.select(obj)
  .attr('r', 5);

  // now we just position the chartTip roughly where our mouse is
  chartTip.style("left", (coord[0] + 60) + "px" );
  chartTip.style("top", (coord[1] + 10) + "px");
  $(".chart-tip").html('<span class="v">' + d[1] + '</span>' + format(d[0]));
  $(".chart-tip").fadeIn(100);
}

function hideData(obj) {
  // enlarge circle
  d3.select(obj)
  .attr('r', 3.5);
  $(".chart-tip").fadeOut(100);
}

$('#chart-holder').append($('<div />', {
  'class': 'chart-tip'
}));

Here is the fiddle

http://jsfiddle.net/murli2308/n7Vmr/12/

I can add space between axis and line if I am using ordinal scale or linear scale. But when I am using time scale, I am not able to add space between axis and line.

I tried

 x = d3.time.scale()
  .range([0, width]);

It is not working.

解决方案

The x.domain is the user space side of the user space to pixel space mapping. In your code you are setting the domain as:

x.domain(d3.extent(data, function(d) { return d[0] - 1; }));

Which says start my x axis at my min time minus 1 millisecond.

If you want some space before / after the line. Try:

x.domain([
  d3.min(data, function(d) { return d[0].getTime() - 1.8e+7; }),
  d3.max(data, function(d) { return d[0].getTime() + 1.8e+7; })
]);

Which says start my x axis 5 hours before my min date and stop it 5 hours after my max date.

Updated fiddle.

EDITS

Just used a percentage based scheme, say you want 5% padding (3.6 hours with your current data):

var minDate = d3.min(data, function(d) { return d[0].getTime(); }),
    maxDate = d3.max(data, function(d) { return d[0].getTime(); }),
    padding = (maxDate - minDate) * .05;

x.domain([minDate - padding, maxDate + padding]);

Updated fiddle.

这篇关于用时间刻度在x轴和line之间添加空格的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!

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