我尝试使用d3和json格式的数据创建多线图。出于某种原因,我的代码不起作用。我还没能找到我做错的地方。搜索过网络并阅读了很多例子,但都无济于事。我可能会盯着我对代码视而不见。
在这个例子中,我只是试图绘制两条线,但是线条的数量是未知的。所以我无法对其进行硬编码。有没有人对我做错的地方有任何提示?
Jsfiddle链接到代码。 http://jsfiddle.net/6qrcmsnj/3/
这也是代码。
var w = 700;
var h = 600;
var pad = 80;
var time_format = d3.time.format("%I:%M:%S");
var gd = example_data(4);
var xScale = d3.time.scale()
.domain(d3.extent(gd[0].data, function(d) { return d[0]; }))
.range([pad, w - pad]);
var yScale = d3.scale.linear()
.domain([0, d3.max(gd[0].data, function(d) { return d[1]; })*2])
.range([h - pad, pad]);
var canvas = d3.select("body")
.append("svg")
.attr("class", "chart")
.attr("width", w)
.attr("height", h);
var xaxis = d3.svg.axis()
.scale(xScale)
.orient("bottom")
.tickFormat(time_format);
var yaxis = d3.svg.axis()
.scale(yScale)
.orient("left");
var line = d3.svg.line()
.x(function(d) { return xScale(d[0]); })
.y(function(d) { return yScale(d[1]); })
.interpolate("linear");
// Just for a grey background.
canvas.append("rect")
.attr("width", "100%")
.attr("height", "100%")
.attr("fill", "#E8E8E8");
// Add x-axis.
canvas.append("g")
.attr("class", "axis")
.attr("transform","translate(0," + (h - pad) + ")")
.call(xaxis)
.selectAll("text")
.style("text-anchor", "end")
.attr("dx", "-.8em")
.attr("dy", ".15em")
.attr("transform", function(d) {
return "rotate(-65)"
});
// Add y-axis
canvas.append("g")
.attr("class", "axis")
.attr("transform", "translate(" + pad + ", 0)")
.call(yaxis);
// Add line
canvas.selectAll("path")
.data(gd)
.enter().append("path")
.attr("d", line(gd.data))
.attr("stroke", "black")
.attr("stroke-width", 1)
.attr("fill", "none");
function example_data(val) {
if (val == "4") {
return [
{ "label" : "Data_1", "data" : [ [ 1404438592000, 21.09 ], [ 1404438593000, 10.85 ], [ 1404438594000, 15.74 ], [ 1404438595000, 20.86 ], [ 1404438596000, 10.83 ], [ 1404438597000, 8.92 ], [ 1404438598000, 23.68 ], [ 1404438599000, 20.68 ], [ 1404438600000, 14.68 ], [ 1404438601000, 4.65 ]] },
{ "label" : "Data_2", "data" : [ [ 1404438592000, 3.219 ], [ 1404438593000, 1.641 ], [ 1404438594000, 6.68 ], [ 1404438595000, 2.543 ], [ 1404438596000, 8.522 ], [ 1404438597000, 4.616 ], [ 1404438598000, 9.703 ], [ 1404438599000, 3.737 ], [ 1404438600000, 8.752 ], [ 1404438601000, 1.791 ]]}
];
}
}
答案 0 :(得分:1)
我将你的jsfiddle复制到一个可以在下面查看的堆栈片段。循环遍历数据,为每个帖子创建一条线。
var total = 11;
var $pictures = $('.inner-pics');
var delta = 500;
var curent = 1;
for (var i = 1; i < total; i++) {
$('#slideshow .inner-pics').append('<div class="slide-' + i + '">');
$('#slideshow .inner-pics div:last').append('<img src="http://lorempixel.com/500/300/food/' + i + '" />');
$('#slideshow .inner-pics div:last').append('<b>Slide ' + i + '</b>'); //add text to slide
$('#slideshow .inner-pics').append('</div>');
$('.circle').append('<i class="fa fa-circle">-</i>');
}
function slideAnimationLeft() {
if(curent<=1) return false;
curent --;
$pictures.animate({
'margin-left': "+="+delta
}, 1000);
};
function slideAnimationRight() {
if(curent>=total) return false;
curent ++;
$pictures.animate({
'margin-left': "-="+delta
}, 1000);
};
$('.left >').click(function (e) {
e.preventDefault();
slideAnimationLeft();
});
$('.right >').click(function (e) {
e.preventDefault();
slideAnimationRight();
});
for(var i = 0; i < gd.length; i++)
{
canvas.append("path")
.data([gd[i].data])
.attr("d", line).attr("class", "line" + i);
}
&#13;
var w = 700;
var h = 600;
var pad = 80;
var time_format = d3.time.format("%I:%M:%S");
var gd = example_data(4);
var xScale = d3.time.scale()
.domain(d3.extent(gd[0].data, function(d) {
return d[0];
}))
.range([pad, w - pad]);
var yScale = d3.scale.linear()
.domain([0, d3.max(gd[0].data, function(d) {
return d[1];
}) * 2])
.range([h - pad, pad]);
var canvas = d3.select("body")
.append("svg")
.attr("class", "chart")
.attr("width", w)
.attr("height", h);
var xaxis = d3.svg.axis()
.scale(xScale)
.orient("bottom")
.tickFormat(time_format);
var yaxis = d3.svg.axis()
.scale(yScale)
.orient("left");
var line = d3.svg.line()
.x(function(d) {
return xScale(d[0]);
})
.y(function(d) {
return yScale(d[1]);
})
.interpolate("linear");
// Just for a grey background.
canvas.append("rect")
.attr("width", "100%")
.attr("height", "100%")
.attr("fill", "#E8E8E8");
// Add x-axis.
canvas.append("g")
.attr("class", "axis")
.attr("transform", "translate(0," + (h - pad) + ")")
.call(xaxis)
.selectAll("text")
.style("text-anchor", "end")
.attr("dx", "-.8em")
.attr("dy", ".15em")
.attr("transform", function(d) {
return "rotate(-65)"
});
// Add y-axis
canvas.append("g")
.attr("class", "axis")
.attr("transform", "translate(" + pad + ", 0)")
.call(yaxis);
for (var i = 0; i < gd.length; i++) {
// Add line
canvas.append("path")
.data([gd[i].data])
.attr("d", line).attr("class", "line" + i);
}
function example_data(val) {
if (val == "4") {
return [{
"label": "Data_1",
"data": [
[1404438592000, 21.09],
[1404438593000, 10.85],
[1404438594000, 15.74],
[1404438595000, 20.86],
[1404438596000, 10.83],
[1404438597000, 8.92],
[1404438598000, 23.68],
[1404438599000, 20.68],
[1404438600000, 14.68],
[1404438601000, 4.65]
]
}, {
"label": "Data_2",
"data": [
[1404438592000, 3.219],
[1404438593000, 1.641],
[1404438594000, 6.68],
[1404438595000, 2.543],
[1404438596000, 8.522],
[1404438597000, 4.616],
[1404438598000, 9.703],
[1404438599000, 3.737],
[1404438600000, 8.752],
[1404438601000, 1.791]
]
}];
}
}
&#13;
.axis path,
.axis line {
fill: none;
stroke: black;
shape-rendering: crispEdges;
}
.line0 {
fill: none;
stroke: steelblue;
stroke-width: 1.5px;
}
.line1 {
fill: none;
stroke: red;
stroke-width: 1.5px;
}
&#13;
答案 1 :(得分:1)
@LarThoren方法肯定会有用,但是d3
我们希望避免显式循环。你的版本遗漏了两件事:
canvas.selectAll(".series") //<-- don't selectAll with "path", there are other paths in the axis and you selection needs to be more specific
.data(gd)
.enter()
.append("path")
.attr("d", function(d){ //<-- gd is out of scope here, you need to use the accessor function
return line(d.data);
})
.attr("class", "series")
.attr("stroke", "black")
.attr("stroke-width", 1)
.attr("fill", "none");
完整的工作代码:
var w = 700;
var h = 600;
var pad = 80;
var time_format = d3.time.format("%I:%M:%S");
var gd = example_data(4);
var xScale = d3.time.scale()
.domain(d3.extent(gd[0].data, function(d) { return d[0]; }))
.range([pad, w - pad]);
var yScale = d3.scale.linear()
.domain([0, d3.max(gd[0].data, function(d) { return d[1]; })*2])
.range([h - pad, pad]);
var canvas = d3.select("body")
.append("svg")
.attr("class", "chart")
.attr("width", w)
.attr("height", h);
var xaxis = d3.svg.axis()
.scale(xScale)
.orient("bottom")
.tickFormat(time_format);
var yaxis = d3.svg.axis()
.scale(yScale)
.orient("left");
var line = d3.svg.line()
.x(function(d) { return xScale(d[0]); })
.y(function(d) { return yScale(d[1]); })
.interpolate("linear");
// Just for a grey background.
canvas.append("rect")
.attr("width", "100%")
.attr("height", "100%")
.attr("fill", "#E8E8E8");
// Add x-axis.
canvas.append("g")
.attr("class", "axis")
.attr("transform","translate(0," + (h - pad) + ")")
.call(xaxis)
.selectAll("text")
.style("text-anchor", "end")
.attr("dx", "-.8em")
.attr("dy", ".15em")
.attr("transform", function(d) {
return "rotate(-65)"
});
// Add y-axis
canvas.append("g")
.attr("class", "axis")
.attr("transform", "translate(" + pad + ", 0)")
.call(yaxis);
// Add line
canvas.selectAll(".series")
.data(gd)
.enter()
.append("path")
.attr("d", function(d){
return line(d.data);
})
.attr("class", "series")
.attr("stroke", "black")
.attr("stroke-width", 1)
.attr("fill", "none");
function example_data(val) {
if (val == "4") {
return [
{ "label" : "Data_1", "data" : [ [ 1404438592000, 21.09 ], [ 1404438593000, 10.85 ], [ 1404438594000, 15.74 ], [ 1404438595000, 20.86 ], [ 1404438596000, 10.83 ], [ 1404438597000, 8.92 ], [ 1404438598000, 23.68 ], [ 1404438599000, 20.68 ], [ 1404438600000, 14.68 ], [ 1404438601000, 4.65 ]] },
{ "label" : "Data_2", "data" : [ [ 1404438592000, 3.219 ], [ 1404438593000, 1.641 ], [ 1404438594000, 6.68 ], [ 1404438595000, 2.543 ], [ 1404438596000, 8.522 ], [ 1404438597000, 4.616 ], [ 1404438598000, 9.703 ], [ 1404438599000, 3.737 ], [ 1404438600000, 8.752 ], [ 1404438601000, 1.791 ]]}
];
}
}
.axis path,
.axis line {
fill: none;
stroke: black;
shape-rendering: crispEdges;
}
<script src="https://cdnjs.cloudflare.com/ajax/libs/d3/3.4.11/d3.min.js"></script>
答案 2 :(得分:1)
两个变化
.attr("d", line(gd.data))
应该是
.attr("d", function (d) { return line(d.data) })
和路径然后添加轴。它应该工作。基本上selectAll(&#39; path&#39;)从轴元素中拾取路径元素。