我正在尝试将标记绘制到可缩放/可缩放的图形中。 我目前的版本位于https://jsfiddle.net/n2enn80o/
var array1 = [[0, 50], [1, 40], [2, 30], [3, 20], [5, 10]];
var result = array1.map(function(e) {
this.num = (this.num || 0) + e[1];
return [e[0], this.num];
}, {});
console.log(result);我已经能够在示例中为我的d3绘图添加静态线，我想要实现的是使标记线与文本“test”一起随图形一起移动。
我所尝试的是使用带有线生成器的d3.svg.line（），但它最终没有获得对d的引用。我尝试的另一个版本是创建一个如下所示的函数，但是没有获得d的引用，并将该行绘制为零。这里我尝试绘制线条，当且仅当数据中存在标记标记时。默认情况下，当填充数据时，我确保它具有Number.NaN，当我不需要绘制标记时。
raw = {"l2":[-58,-44,-31,-21,-17,-16,-16,-15,-15,-14,-13,-12,-11,-10,-9,-7,-5,-3,-1,2,4,8,11,14,17,20,24,28,32,37,41,46,51,56,60,64,69,73,77,82,84,87,87,87,87,85,82,77,73,66,60,53,46,39,33,26,20,13,8,4,-1,-6,-10,-14,-16,-19,-22,-25,-26,-27,-28,-29,-30,-31,-31,-32,-32,-32,-32,-31,-31,-31,-31,-31,-30,-31,-30,-30,-30,-30,-29,-28,-27,-27,-27,-27,-27,-26,-26,-26,-26,-26,-26,-26,-26,-25,-25,-25,-25,-25,-25,-25,-25,-25,-24,-24,-24,-25,-25,-24,-23,-23,-23,-23,-23,-23,-23,-23,-23,-22,-22,-22,-22,-22,-22,-21,-21,-21,-21,-20,-20,-20,-20,-19,-18,-16,-13,-10,-6,-2,1,4,7,9,12,14,16,16,16,15,13,9,6,2,-1,-4,-7,-10,-11,-12,-14,-15,-16,-17,-18,-19,-19,-20,-20,-20,-20,-20,-20,-20,-24,-32,-45,-54,-50,-25,25,97,182,252,270,220,126,35,-25,-53,-65,-71,-70,-60,-46,-32,-22,-18,-16,-16,-15,-14,-13,-13,-12,-11,-10,-8,-7,-5,-3,-1,1,4,7,10,14,17,21,24,28,32,36,40,45,50,55,59,64,69,72,77,81,84,87,88,88,87,84,82,77,73,67,61,54,47,39,33,26,20,14,9,4,-1,-6,-9,-13,-16,-19,-22,-24,-26,-28,-29,-29,-30,-30,-31,-32,-32,-32,-31,-31,-32,-31,-31,-31,-31,-30,-30,-29,-29,-29,-29,-28,-28,-27,-27,-28,-28,-26,-26,-26,-26,-26,-26,-26,-26,-25,-25,-25,-25,-25,-25,-26,-26,-25,-24,-24,-24,-24,-24,-24,-24,-23,-23,-23,-23,-23,-23,-23,-24,-22,-22,-22,-22,-22,-22,-22,-21,-22,-20,-20,-20,-20,-20,-19,-18,-16,-13,-10,-8,-3,0,4,7,9,11,13,15,16,16,16,14,11,6,2,-2,-4,-7,-9,-11,-12,-14,-16,-17,-18,-19,-19,-19,-19,-20,-20,-20,-20,-20,-20,-23,-30,-43,-54,-53,-30,17,88,172,245,271,230,138,45,-19,-50,-63,-70,-70,-61,-48,-34,-23,-18,-17,-16,-16,-15,-14,-13,-13,-11,-10,-8,-7,-5,-3,-1,1,4,7,9,13,16,20,23,27,31,36,40,44,49,54,59,63,68,73,76,81,83,86,88,87,87,85,82,78,73,68,62,55,48,40,33,27,20,14,9,4,0,-5,-9,-13,-16,-19,-22,-24,-26,-28,-29,-29,-29,-30,-31,-31,-32,-31,-32,-32,-32,-32], "startts":1357714800000,"marker1":[50,100]};
var data =[];
for(var i=0;i<raw.l2.length;i++)
{
var marker = Number.NaN;
for(var j=0;j<raw.marker1.length;j++)
{
if(i==raw.marker1[j])
{
marker=i;
break;
}
}
var obj = {"date":raw.startts+(1/244.140625*1000)*i, "value":raw.l2[i]/75,"marker":marker}
data.push(obj)
}
margin = {
top: 20,
right: 20,
bottom: 20,
left: 45
};
width = 1800 - margin.left - margin.right;
height = 600 - margin.top - margin.bottom;
var x = d3.time.scale()
.domain(d3.extent(data, function (d) {
return d.date;
}))
.range([0, width]);
var y = d3.scale.linear()
.domain(d3.extent(data, function (d) {
return d.value;
}))
.range([height, 0]);
var line = d3.svg.line()
.x(function (d) {
return x(d.date);
})
.y(function (d) {
return y(d.value);
});
var zoom = d3.behavior.zoom()
.x(x)
.y(y)
.on("zoom", zoomed);
svg = d3.select('#chart')
.append("svg:svg")
.attr('width', width + margin.left + margin.right)
.attr('height', height + margin.top + margin.bottom)
.append("svg:g")
.attr("transform", "translate(" + margin.left + "," + margin.top + ")")
.call(zoom);
svg.append("svg:rect")
.attr("width", width)
.attr("height", height)
.attr("class", "plot");
var make_x_axis = function () {
return d3.svg.axis()
.scale(x)
.orient("bottom")
.ticks(5);
};
var make_y_axis = function () {
return d3.svg.axis()
.scale(y)
.orient("left")
.ticks(5);
};
var xAxis = d3.svg.axis()
.scale(x)
.orient("bottom")
.ticks(5);
svg.append("svg:g")
.attr("class", "x axis")
.attr("transform", "translate(0, " + height + ")")
.call(xAxis);
var yAxis = d3.svg.axis()
.scale(y)
.orient("left")
.ticks(5);
svg.append("g")
.attr("class", "y axis")
.call(yAxis);
var marker = svg.append("line")
.attr("x1",100)
.attr("y1", 0)
.attr("x2",100)
.attr("y2", height)
.attr("class", "marker")
svg.append("text")
.attr("x", 100)
.attr("y", 0)
.attr("dy", ".35em")
.attr("dx", 5)
.attr("class", "marker-text")
.text(function(d) { return "test"; });
svg.append("g")
.attr("class", "x grid")
.attr("transform", "translate(0," + height + ")")
.call(make_x_axis()
.tickSize(-height, 0, 0)
.tickFormat(""));
svg.append("g")
.attr("class", "y grid")
.call(make_y_axis()
.tickSize(-width, 0, 0)
.tickFormat(""));
var clip = svg.append("svg:clipPath")
.attr("id", "clip")
.append("svg:rect")
.attr("x", 0)
.attr("y", 0)
.attr("width", width)
.attr("height", height);
var chartBody = svg.append("g")
.attr("clip-path", "url(#clip)");
chartBody.append("svg:path")
.datum(data)
.attr("class", "line")
.attr("d", line);
function zoomed() {
console.log(d3.event.translate);
console.log(d3.event.scale);
svg.select(".x.axis").call(xAxis);
svg.select(".y.axis").call(yAxis);
svg.select(".x.grid")
.call(make_x_axis()
.tickSize(-height, 0, 0)
.tickFormat(""));
svg.select(".y.grid")
.call(make_y_axis()
.tickSize(-width, 0, 0)
.tickFormat(""));
svg.select(".line")
.attr("class", "line")
.attr("d", line);
}
答案 0 :(得分：1)
根据我对你问题的回复，我做了一些小改动。在缩放处理程序zoomed()内，您需要更改x1＆amp; x2的{{1}}属性以及marker的{{1}}属性。
此功能会在每个缩放事件中触发，以根据您的缩放和轴移动内容或重绘内容。
x答案 1 :(得分：0)
这可以通过使用d3轴来解决。 https://jsfiddle.net/3gww76s0/
提供了一个工作示例var make_x_marker = function (scale=1, transform=[0,0]) {
console.log(transform)
var markers =[];
var markerLabels={};
for (i=0; i<raw.marker1.length; i++)
{
var value=transform[0]+scale*(1/244.140625*1000)*raw.marker1[i];
markers.push(value)
markerLabels[value]="A"+Math.floor(Math.random()*26);
}
return d3.svg.axis()
.orient("top")
.tickValues(markers)
.tickSize(height-15)
.tickFormat(function(d){return markerLabels[d]})
};