在带有D3.js的线图中激活线 [英] Animate lines in a line graph with D3.js

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问题描述

我有我的线图,有2条线。
绘制我的线图的数据是从.csv文件中提取的。



任何人都可以解释如何从一个空图开始,

提前感谢!



$

b $ b var button = d3.select(#button);

  var margin = {top:30,right: 20,bottom:50,left:60},
width = 700 - margin.left - margin.right,
height = 300 - margin.top - margin.bottom;

var parseDate = d3.time.format(%d-%b-%y)。parse;


//处理作为时间/日期传递给它的值
// OUTPUT RANGE
var x = d3.time.scale()
.range([0,width]);

// OUTPUT RANGE
var y = d3.scale.linear()
.range([height,0]);

var xAxis = d3.svg.axis()。scale(x)
.orient(bottom)
.ticks(5);

var yAxis = d3.svg.axis()。scale(y)
.orient(left)
.ticks(5);

//为每个数据分配坐标
var valueline = d3.svg.line()
.interpolate(linear)
.x (d){return x(d.date);})
.y(function(d){return y(d.close);});

//第二行数据
var valueline2 = d3.svg.line()
.x(function(d){return x(d.date);})
.y(function(d){return y(d.open);});

//为行下面的'area'创建区域
var area = d3.svg.area()
.x(function(d){return x(d.date );})
.y0(height)
.y1(function(d){return y(d.close);});

//创建绘制图形的区域
var svg = d3.select(body)
.append(svg)
.attr ,width + margin.left + margin.right)
.attr(height,height + margin.top + margin.bottom)
//分组内容
.append )
.attr(transform,translate(+ margin.left +,+ margin.top +));

function make_x_axis(){
return d3.svg.axis()
.scale(x)
.orient(bottom)
。 tick(5)
}

function make_y_axis(){
return d3.svg.axis()
.scale(y)
.orient left)
.ticks(30)
}

// csv回调函数
d3.csv(myData2.csv,function
data.forEach(function(d){
d.date = parseDate(d.date);
// + operator将任何'close'值设置为nuneric
d。 close = + d.close;
d.open = + d.open;

} );

  // INPUT DOMAINS 
// extend()返回参数的最小值和最大值
x.domain(d3.extent(data,function(d){return d.date;}));
//返回任何一组数据的最大值
y.domain([0 ,d3.max(data,function(d){return Math.max(d.close,d.open);})]);

//绘制行
// valueline数组到路径对象
svg.append(path)//添加valueline路径。
.attr(class,line)
//添加虚线
.style(stroke-dasharray,(5,9))//< = =这行在这里!
.attr(d,valueline(data));


button.on(click,function(){
svg.append(path)//添加valueline2路径
.attr class,line2)
.transition()
.attr(d,valueline2(data));
})

$ b b svg.append(g)//添加X轴
.attr(class,x axis)
//将x轴移动到图形底部
.attr (transform,translate(0,+ height +))
.call(xAxis);

// x轴的文本标签
svg.append(text)// x轴的文本标签
.attr(transform,translate +(width / 2)+,+(height + margin.bottom - 5)+))
.style(text-anchor,middle)
.text 日期);

svg.append(g)//添加Y轴
.attr(class,y axis)
.call(yAxis);

// y轴的文本标签
svg.append(text)
.attr(transform,rotate(-90))
.attr(y,0 - margin.left)
.attr(x,0 - (height / 2))
//将额外的左边填充添加为原始y pos = 0
.attr(dy,1em)
.style(text-anchor,middle)
.text(Value);


//为图形添加标题
svg.append(text)
.attr(x,(width / 2))
.attr(y,0 - (margin.top / 2))
.attr(text-anchor,middle)
.style(font-size, 16px)
.style(text-decoration,underline)
.text(Me Graph Larry);


//绘制x轴网格
svg.append(g)
.attr(class,grid)
。 attr(transform,translate(0,+ height +))
.call(make_x_axis()
.tickSize(-height,0,0)
.tickFormat )


//绘制y轴网格
svg.append(g)
.attr(class,grid)
.call(make_y_axis()
.tickSize(-width,0,0)
.tickFormat()


}); ;! - d3.csv close - >

解决方案>

您需要为动画设置合理的开始值:

  var startvalueline2 = d3.svg.line 
.x(function(d){return x(d.date);})
.y(function(d){return y(0);})

button.on(click,function(){
svg.append(path)//添加valueline2路径
.attr(class,line2)
.attr(d,startvalueline2(data)); //设置起始位置
.transition()
.attr(d,valueline2(data)); $ b});

您也可以看看Mike的路径转换页面。要了解如何使用 svg:path 时如何实现平滑(非摆动)动画。


I have my line graph, with 2 lines. Data to draw my line graph is pulled from a .csv file.

Can anyone explain how I could start off with an empty graph, and when I click a button, my lines animate across the graph?

Thanks in advance!!

var button=d3.select("#button");

var margin = {top: 30, right: 20, bottom: 50, left: 60},
width = 700 - margin.left - margin.right,
height = 300 - margin.top - margin.bottom;

var parseDate = d3.time.format("%d-%b-%y").parse;


//treats value passed to it as a time/date
//OUTPUT RANGE
var x = d3.time.scale()
    .range([0, width]);

//OUTPUT RANGE  
var y = d3.scale.linear()
    .range([height, 0]);

var xAxis = d3.svg.axis().scale(x)
    .orient("bottom")
    .ticks(5);

var yAxis = d3.svg.axis().scale(y)
    .orient("left")
    .ticks(5);

//assigns coordinates for each piece of data    
var valueline = d3.svg.line()
    .interpolate("linear")
    .x(function(d) { return x(d.date); })
    .y(function(d) { return y(d.close); });

//second line data
var valueline2 = d3.svg.line()
    .x(function(d) { return x(d.date); })
    .y(function(d) { return y(d.open); });

//create area for 'area' below line 
var area = d3.svg.area()
    .x(function(d) { return x(d.date); })
    .y0(height)
    .y1(function(d) { return y(d.close); });    

//creates area to draw graph    
var svg = d3.select("body")
    .append("svg")
    .attr("width", width + margin.left + margin.right)
    .attr("height", height + margin.top + margin.bottom)
//groups content    
.append("g")
    .attr("transform", "translate(" + margin.left + "," + margin.top + ")");

function make_x_axis() {
    return d3.svg.axis()
        .scale(x)
        .orient("bottom")
        .ticks(5)
}

function make_y_axis() {
    return d3.svg.axis()
        .scale(y)
        .orient("left")
        .ticks(30)
}

// csv callback function
d3.csv("myData2.csv", function(data) {
    data.forEach(function(d) {
    d.date = parseDate(d.date);
    //+ operator sets any 'close' values to nuneric
    d.close = +d.close;
    d.open = +d.open;   

});

//INPUT DOMAINS
//.extent() returns min and max values of argument
x.domain(d3.extent(data, function(d) { return d.date; }));
//returns max of whichever set of data is bigger
y.domain([0, d3.max(data, function(d) { return Math.max(d.close, d.open); })]);

//draws lines
//passes the valueline array to path object
svg.append("path") // Add the valueline path.
    .attr("class", "line")
    //adds dashed line
    .style("stroke-dasharray", ("5, 9")) // <== This line here!!
    .attr("d", valueline(data));


button.on("click", function() { 
    svg.append("path")      // Add the valueline2 path. 
        .attr("class", "line2")
        .transition()
        .attr("d", valueline2(data));
    })


svg.append("g") // Add the X Axis
    .attr("class", "x axis")
    //moves x axis to bottom of graph
    .attr("transform", "translate(0," + height + ")")
    .call(xAxis);

//text label for x-axis 
svg.append("text") // text label for the x axis
    .attr("transform", "translate(" + (width / 2) + " ," + (height + margin.bottom - 5 ) + ")")
    .style("text-anchor", "middle")
    .text("Date");

svg.append("g") // Add the Y Axis
    .attr("class", "y axis")
    .call(yAxis);

//text label for y-axis 
svg.append("text")
    .attr("transform", "rotate(-90)")
    .attr("y", 0 - margin.left)
    .attr("x",0 - (height / 2))
    //adds extra left padding as original y pos = 0
    .attr("dy", "1em")
    .style("text-anchor", "middle")
    .text("Value");


//adding a title to the graph
svg.append("text")
    .attr("x", (width / 2))
    .attr("y", 0 - (margin.top / 2))
    .attr("text-anchor", "middle")
    .style("font-size", "16px")
    .style("text-decoration", "underline")
    .text("Me Graph Larry");


//draw x axis grid  
svg.append("g")
    .attr("class", "grid")
    .attr("transform", "translate(0," + height + ")")
    .call(make_x_axis()
    .tickSize(-height, 0, 0)
    .tickFormat("")
)

//draw y axis grid
svg.append("g")
    .attr("class", "grid")
    .call(make_y_axis()
    .tickSize(-width, 0, 0)
    .tickFormat("")
)

});<!--d3.csv close-->

解决方案

You need to setup a reasonable start value for the animation:

var startvalueline2 = d3.svg.line()
    .x(function(d) { return x(d.date); })
    .y(function(d) { return y(0);      })

button.on("click", function() { 
    svg.append("path")                     // Add the valueline2 path. 
        .attr("class", "line2")
        .attr("d", startvalueline2(data)); // set starting position
        .transition()
        .attr("d", valueline2(data));      // set end position
});

You might also have a look at Mike's path transitions page. To see how to implement smooth (non-wobbly) animations when using svg:path.

这篇关于在带有D3.js的线图中激活线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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