I have built a multi series line chart using the D3 library. I have been trying to work on animating the line chart so I can give out one line at a time and not all 5 of them together. Can anybody give me some ideas as to how I can go about with this? I have tried using transition() but I seem to be using it wrong. This is what I have done so far -
var city = svg.selectAll(".city")
.data(years)
.enter().append("g")
.attr("class", "city");
city.append("path")
.attr("class", "line");`
d3.transition().selectAll(".line")
.duration(500)
.ease("linear")
.attr("d", function(d){return line(d.values); })
.style("stroke", function(d) {return color(d.name); })
.attrTween("d",pathTween);
function pathTween() {
var interpolate = d3.scale.quantile()
.domain([0,1])
.range(d3.range(1,years.length+1));
return function(t){
return line(data.slice(0,interpolate(t)));
};
D3 transitions have a .delay() method that allows you to set a delay before each transition starts. In your case (having each line start separately) it would look like this:
d3.transition().selectAll(".line")
.duration(500)
.delay(function(d, i) { return i * 500; })
.ease("linear")
.attr("d", function(d){return line(d.values); })
.style("stroke", function(d) {return color(d.name); });
This takes the index of each line (i) and offsets the start of the transition depending on that.
Related
I made d3.js pie chart and related legend with population data popu. When I hover over pie segments I achieved to enlarge related legend square parts and the pie segment itself (larger outerRadius). Now I am trying to do contrary. When I hover over square of legend I want to enlarge square itself and related pie segment as well. Something like this example here https://www.amcharts.com/demos/pie-chart-with-legend/. I will write down just part of the code related to pie chart problem that I have.
var pie = d3.pie()
.value(function(d) {return d.pop})(popu);
var seg = d3.arc()
.innerRadius(100)
.outerRadius(150)
.padAngle(.1)
.padRadius(45);
var segover = d3.arc()
.innerRadius(100)
.outerRadius(170)
.padAngle(.1)
.padRadius(45);
So this part is working great.
svg.append("g")
.attr("class", "pieChart")
.attr("transform", "translate(1250,570)")
.selectAll("path")
.data(pie)
.append("path")
.attr("class", "pie")
.attr("id", function(d){return d.data.id})
.attr("d", seg)
.on("mouseenter", function(d){
d3.select(this)
.transition(10)
.duration(100)
.attr("d", segover)
})
Then I tried to change pie chart segment when hovering on legend related segments.
var pieEl = svg.selectAll(".pie");
var piePath = pieEl.nodes();
svg.append("g")
.attr("class", "legend")
.attr("transform", "translate(-50,280)")
.selectAll(".mySquers")
.data(pie)
.enter()
.append("rect")
.attr("class", "rec")
.attr("x", 100)
.attr("y", function(d,i){ return 100 + i*25})
.attr("width", "15")
.attr("height", "15")
.attr("id", function(d,i){ return (popu[d,i].id)})
.style("fill",function(d,i){
if (this.id == piePath[i].id){
return piePath[i].getAttribute("fill")
}
})
.on("mouseenter", function(d){
for (var i=0; i<piePath.length; i++){
if (piePath[i].id == d.data.id){
piePath[i].setAttribute("d", segover);
}}
})
When I tray to setAttribute("d", segover) in DOM instead of d attribute written as string as usually (d="M144.58.....") I have a function (d="function(pie){ _e);}" and on hover pie segment dissapear. But for example if I set attribute fill to red on hover it change and segment is painted. So the notation of code is good. Is there some behavior of d path generated with d3.arc() that I am missing? Any suggestion is welcome.
I think you should be passing your data as an argument in your function. Normally, it is taken as default argument when you return the function directly.
piePath[i].setAttribute("d", segover(*data associated with segment*));
svg.append("g")
.attr("class", "pieChart")
.attr("transform", "translate(1250,570)")
.selectAll("path")...
.attr("d", seg) // this is same as : attr("d", seg(d))
.on("mouseenter", function(d){
d3.select(this)
.transition(10)
.duration(100)
.attr("d", segover) // same here
})
I'm visualising voyages on a map with D3.js' path. My data is in a JSON file like the following format:
[{"begin_date":1519,"trips":[[-13.821772,14.294839],[-9.517688,-7.958521],[0.598434,-34.704567],[18.374673,-86.850335]]},
{"begin_date":1549,"trips":[[12.821772,-16.294839],[5.517688,-20.958521],[13.598434,-54.704567],[18.374673,-86.850335]]},
{"begin_date":1549,"trips":[[12.821772,-16.294839],[5.517688,-20.958521],[13.598434,-54.704567],[18.374673,-86.850335]]}]
As can be seen, sometimes there are multiple voyages for a year. The following recursive function works:
d3.json("data/output.json", function(error, trips) {
if (error) throw error
var nest = d3.nest()
.key(function(d){
return d.begin_date;
})
.entries(trips)
var trip = svg.selectAll(".voyage");
// Add the year label; the value is set on transition.
var label = svg.append("text")
.attr("class", "year label")
.attr("text-anchor", "end")
.attr("y", height - 400)
.attr("x", width+150)
.text(function(d) {return d});
var pnt = 0;
doTransition();
function doTransition() {
trip.data(nest[pnt].values).enter()
.append("path")
.attr("class", "voyage")
.style("stroke", colorTrips)
.attr('d', function(d) {label.text(d.begin_date); return lineGen(d.trips.map(reversed).map(projection))})
.call(function transition(path) {
path.transition()
.duration(500)
.attrTween("stroke-dasharray", tweenDash)
.each("end", function(d) {
d3.selectAll(".voyage")
.remove()
pnt++;
if (pnt >= nest.length){return;}
doTransition();
})
})
}
Some voyages plot as they should
However some of them, are never plotted (I can see in the log) and it jumps from year 1545-1569 despite there being data points in between. I suspect it is due to the recursive function calling itself before the transition is finished. But I am also not sure, in the slightest.
Hope it is sufficient, I am new to D3.js, and suddenly found myself out of depth.
I have a scatter plot in which I need to fit a line to the plot. I load the data with an ajax call as JSON.
I just can't seem to get the line to show. When I inspect elements I can see the path but nothing shows.
Here is a JSFiddle with the problem:
I've commented the ajax part out and hard coded the data I get back.
JSFiddle with missing line
And I am guessing the problem is somewhere around line 299-318 here:
linegroup = main.append('g')
.attr('transform', 'translate(0,0)')
.attr('class', 'main myline');
var line = d3.svg.line()
.x(function (d) {
return d.x;
})
.y(function (d) {
return d.y;
});
linegroup.selectAll("path")
.data([data.line])
.enter()
.append("path")
.attr("d", line)
.attr("fill", "none")
.attr("stroke", "#000")
.attr("stroke-width", 5);
What am I doing wrong?
I managed to figure it out, sorry to bother you.
The problem was I had forgot to add the scales to the line so it ended up way below the page ended.
var line = d3.svg.line()
.x(function (d) { return x(d.x); })
.y(function(d) { return y(d.y); });
I have put together a D3 line chart and added threshold encoding using clip path / clipping. The only problem I am facing is I am not able to add tooltips to this chart. I want a tooltip when I hover anywhere in the chart and the corresponding y axis value on the chart shows up in the tooltip.
I have added threshold encoding using this example by Mike Bostock.
var line = d3.svg.line()
.interpolate("basis")
.x(function(d) { return _config.xScale(d.vtc); })
.y(function(d) { return _config.yScale(d.values); });
svg.append("clipPath")
.attr("id", "clip-above")
.append("rect")
.attr("width", _config.width)
.attr("height", _config.yScale(55));
svg.append("clipPath")
.attr("id", "clip-below")
.append("rect")
.attr("y", _config.yScale(55))
.attr("width", _config.width)
.attr("height", _config.height - _config.yScale(55));
svg.selectAll(".line")
.data(["above", "below"])
.enter().append("path")
.attr("class", function(d) { return "line " + d; })
.attr("clip-path", function(d) { return "url(#clip-" + d + ")"; })
.datum(data)
.attr("d", line);
I didn't know how to go about adding a tooltip for this particular chart as there is clip rectangle over the path and the path is broken down into above and below segment to give the colour effects.
Do we have a unified way to add a tooltip to normal path and this one? If yes I would like to know some sources/links I can look at.
Something like this, but not that complicated (without any indicator on the line, just the tooltip)
My CODEPEN LINK
You can add mouseOver handler for the line and translate back the mouse y position to yAxis value using the .invert function of d3 linear scale. Now, you can dynamically add a tooltip text element and set the position, value to it
Here is the updated Codepen link
NOTE: You still need to increase the capture area of the line. This can be done by adding a transparent stroke to the line.
svg.selectAll(".line")
.data(["above", "below"])
.enter().append("path")
.attr("class", function(d) { return "line " + d; })
.attr("clip-path", function(d) { return "url(#clip-" + d + ")"; })
.datum(data)
.attr("d", line)
.on("mouseover", function() {
var mousePos = d3.mouse(this);
var yAxisValue = _config.yScale.invert(mousePos[1]);
svg.selectAll(".tooltip").data([mousePos])
.enter().append("text")
.classed("tooltip", true)
.attr("x", function(d) { return d[0]})
.attr("y", function(d) { return d[1]})
.text(yAxisValue);
})
.on("mouseout", function() {
svg.selectAll(".tooltip").data([]).exit().remove();
});
I am new to using d3 and JavaScript and would appreciate some constructive feedback. I'm mocking up a practice example to learn d3 that involves plotting climate data (temperature anomaly) from 1880-2010 from two sources (GISS and HAD). So far I have generated a multiple line chart in d3 using this data. Code and data are here https://gist.github.com/natemiller/0c3659e0e6a0b77dabb0
In this example the data are originally plotted grey, but each line colored a different color on mouseover.
I would like to add two additional features.
I would like, on mouseover, to reorder the lines so that the moused-over line is on top, essentially reorder the lines. I've read that this requires essentially replotting the SVG and I have tried code along the lines of this
source.append("path")
.attr("class", "line")
.attr("d", function(d) { return line(d.values); })
.style("stroke", "lightgrey")
.on("mouseover", function() {
if (active) active.classed("highlight", false);
active = d3.select(this.parentNode.appendChild(this))
.classed("highlight", true);
})
.style("stroke",function(d) {return color(d.name);})
.on("mouseout", function(d) {
d3.select('#path-' + d.name)
.transition()
.duration(750)
.style("stroke", "lightgrey")
})
.attr("id", function(d, i) { return "path-" + d.name; });
where the .on("mouseover"... code is meant to highlight the current "moused-over" line. It doesn't seem to work in my example. All the lines are highlighted initially and then turn grey with the mouseover/mouseout. If someone could help me identify how to update my code so that I can reorder the lines on mouseover that would be great!
I have been playing around with labeling the lines such that when either the line or its label is moused-over the line and label colors update. I've played around a bit using id's but so far I can't get both the text and the line to change color. I've managed to 1. mouseover the line and change the color of the text, 2. mouseover the text and change the color of the line, 2. mouseover the line and change the line, but not have both the line and the text change color when either of them are moused-over. Here is a section of code that serves as a start (using ids), but doesn't quite work as it only specifies the path, but not the text and the path. I've tried adding them both to d3.select('#path-','#text-'..., and variations on this, but it doesn't seem to work.
source.append("path")
.attr("class", "line")
.attr("d", function(d) { return line(d.values); })
.style("stroke", "lightgrey")
.on("mouseover", function(d){
d3.select(this)
.style("stroke",function(d) {return color(d.name);});
})
.on("mouseout", function(d) {
d3.select('#path-' + d.name)
.transition()
.duration(750)
.style("stroke", "lightgrey")
})
.attr("id", function(d, i) { return "path-" + d.name; });
source.append("text")
.datum(function(d) { return {name: d.name, value: d.values[d.values.length - 15]}; })
.attr("transform", function(d) { return "translate(" + x(d.value.date) + "," + y(d.value.temperature) + ")"; })
.attr("x", 5)
.attr("dy", ".35em")
.style("stroke", "lightgrey")
.on("mouseover", function(d){
d3.select('#path-' + d.name)
.style("stroke",function(d) {return color(d.name);});
})
.on("mouseout", function(d) {
d3.select('#path-' + d.name)
.transition()
.duration(750)
.style("stroke", "lightgrey")
})
.text(function(d) { return d.name; })
.attr("font-family","sans-serif")
.attr("font-size","11px")
.attr("id", function(d, i) { return "text-" + d.name; });
I greatly appreciate your help. I am new to d3 and this help-serve. Its a steep learning curve at the moment, but I hope this example and the code is reasonably clear. If its not let me know how I can make it better and I can repost the question.
Thanks so much,
Nate
Chris Viau provided a good answer to this question over on the d3 Google group.
https://groups.google.com/forum/?fromgroups=#!topic/d3-js/-Ra66rqHGk4
The trick is to select the path's g parent to reorder it with the others:
this.parentNode.parentNode.appendChild(this.parentNode);
This appends the current selection's container "g" on top of all the other "g".
I've found this useful in lots of other instances as well.
Thanks Chris!