How to make a dashed line legend with d3.js - d3.js

I usually make a line legend by appending a rect giving it a very small height so that it looks like a line.
But now I need a dashed line legend. I am not able to do it by my old way. Can anyone show me a quick example of how to make a line legend with append('path') with d3.js?

You can make it like this with a line DOM:
var legend = svg.selectAll(".legend")
.data(ageNames.slice().reverse())//data set for legends
.enter().append("g")
.attr("class", "legend")
.attr("transform", function(d, i) { return "translate(0," + i * 20 + ")"; });
legend.append("line")//making a line for legend
.attr("x1", width - 28)
.attr("x2", width)
.attr("y1", 10)
.attr("y2", 10)
.style("stroke-dasharray","5,5")//dashed array for line
.style("stroke", color);
legend.append("text")
.attr("x", width - 44)
.attr("y", 9)
.attr("dy", ".35em")
.style("text-anchor", "end")
.text(function(d) { return d; });
Working example here
Hope this work

Related

Text in the circle [duplicate]

This question already has answers here:
Adding text to d3 circle
(2 answers)
Closed 3 years ago.
I am writing a text element (x axis measure value) for each circle but even after showing text element in inspect in browser its not showing
I have appended the text under circle given same x and y for the circle but its coming through
!DOCTYPE html>
<meta charset="utf-8">
<!-- Load d3.js -->
<script src="https://d3js.org/d3.v4.js"></script>
<!-- Create a div where the graph will take place -->
<div id="my_dataviz"></div>
<script>
// set the dimensions and margins of the graph
var margin = {top: 10, right: 30, bottom: 40, left: 100},
width = 460 - margin.left - margin.right,
height = 500 - margin.top - margin.bottom;
// append the svg object to the body of the page
var svg = d3.select("#my_dataviz")
.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 + ")");
// Parse the Data
d3.csv("https://raw.githubusercontent.com/holtzy/data_to_viz/master/Example_dataset/7_OneCatOneNum_header.csv", function(data) {
// sort data
data.sort(function(b, a) {
return a.Value - b.Value;
});
// Add X axis
var x = d3.scaleLinear()
.domain([0, 13000])
.range([ 0, width]);
svg.append("g")
.attr("transform", "translate(0," + height + ")")
.call(d3.axisBottom(x))
.selectAll("text")
.attr("transform", "translate(-10,0)rotate(-45)")
.style("text-anchor", "end");
// Y axis
var y = d3.scaleBand()
.range([ 0, height ])
.domain(data.map(function(d) { return d.Country; }))
.padding(1);
svg.append("g")
.call(d3.axisLeft(y))
// Lines
svg.selectAll("myline")
.data(data)
.enter()
.append("line")
.attr("x1", x(0))
.attr("x2", x(0))
.attr("y1", function(d) { return y(d.Country); })
.attr("y2", function(d) { return y(d.Country); })
.attr("stroke", "grey")
// Circles -> start at X=0
svg.selectAll("mycircle")
.data(data)
.enter()
.append("circle")
.attr("cx", x(0) )
.attr("cy", function(d) { return y(d.Country); })
.attr("r", "7")
.style("fill", "#69b3a2")
.attr("stroke", "black")
// Change the X coordinates of line and circle
svg.selectAll("circle")
.transition()
.duration(2000)
.attr("cx", function(d) { return x(d.Value); })
svg.selectAll("line")
.transition()
.duration(2000)
.attr("x1", function(d) { return x(d.Value); })
// this is the line i have added at my end and it showing as well while i do the inspect element.
svg.selectAll("circle")
.append(Text)
.attr("x", function (d) { return x(d.Value); })
.attr("y", function (d) { return y(d.Country); })
.text(function (d) { return d.Value})
.attr("font-family", "sans-serif")
.attr("font-size", "6px")
.attr("fill", "black")
.style("text-anchor", "middle")
})
</script>
Would like to show measure value under circle so user dont have to guess the x axis. circle is at 13000 so it should show as 13 in circle divided by 1000
From what I can see there's a couple of things going on.
Firstly, instead of:
...
.append(Text)
which is trying to pass in a variable called Text to the append function, it should be:
...
.append('text')
i.e. append an svg text element.
However, this is still appending text elements to circle elements. If you look at the elements via Chrome Devtools, you can see that there will be a text element inside each circle element, which doesn't actually display anything.
Instead, the label text needs to be rendered separately from the circles using something like.
svg.selectAll("mytext")
.data(data)
.enter()
.append('text')
.attr("x", function (d) { return x(d.Value) + 10; })
.attr("y", function (d) { return y(d.Country) + 4; })
.text(function (d) { return d.Value})
.attr("font-family", "sans-serif")
.attr("font-size", "10px")
.attr("fill", "black")
.style("text-anchor", "start")
.style('opacity', 0)
.transition()
.delay(1500)
.duration(500)
.style('opacity', 1);
I've made the font a bit bigger, and adjusted the x and y values and used text-anchor: start so that now the text appears just off the right of the circles. I've also put in a transition based on opacity with a delay so that the text only appears at the end of the circles' animation.

Adding background color to axis labels in D3 parallel coordinates

I'm working on a modified version of this D3 code for parallel coordinates. I would like to add a background color for the axis labels. I realize I cannot set a background color using CSS styles because this is SVG text, so I tried to append rectangles but to no avail. Here is what I wrote but it's not drawing anything:
d3.selectAll(".label")
.append("rect")
.attr("x", function(d){ return d3.select(this).node().getBBox().x - 5;})
.attr("y", function(d){ return d3.select(this).node().getBBox().y - 5;})
.attr("width", function(d){ return d3.select(this).node().getBBox().width;})
.attr("height", function(d) {return d3.select(this).node().getBBox().height;})
.style("stroke", "black")
.style("fill", "yellow");
What am I doing wrong?
EDIT:
based on comments, I appended to the parent g rather than the text label itself. Now the code looks like this:
// Add an axis and title.
var gsvg= g.append("svg:g")
.attr("class", "axis")
.attr("id", "gsvg")
.each(function(d) { d3.select(this).call(axis.scale(yscale[d])); })
.attr("transform", "translate(0,0)");
d3.selectAll("#gsvg")
.append("rect")
.attr("x", function(d){ return this.parentNode.getBBox().x - 5;})
.attr("y", function(d, i){ return i%2 === 0 ? this.parentNode.getBBox().y - 20: this.parentNode.getBBox().y - 35;})
.attr("width", function(d){ return this.parentNode.getBBox().width;})
.attr("height", function(d) {return 20;})
.style("stroke", "lightgrey")
.style("stroke-width", 2)
.style("fill", function(d){
return self.fcolorMap[d];
})
.style("opacity", 0.5);
gsvg.append("svg:text")
.style("text-anchor", "middle")
.attr("y", function(d,i) { return i%2 == 0 ? -14 : -30 } )
.attr("x",0)
.attr("class", "axis-label")
.text(function(d) {
var s = d.split("|");
return s[s.length-1]; });
The only problem is now I need to figure out how to get the bounding boxes of the labels rather than those of the axes.

Multidonut chart d3 legendds not working

I am a d3 newbie . I was trying to create a multidonut chart.
but I am not getting the legend columns.I have added my code here
http://jsfiddle.net/YsvT8/
i tried to add this code
var legend = d3.select("body").append("svg")
.attr("class", "legend")
.attr("width", radius * 2)
.attr("height", radius * 2)
.selectAll("g")
.data(color.domain().slice().reverse())
.enter().append("g")
.attr("transform", function(d, i) { return "translate(0," + i * 20 + ")"; });
legend.append("rect")
.attr("width", 18)
.attr("height", 18)
.style("fill", color);
legend.append("text")
.attr("x", 24)
.attr("y", 9)
.attr("dy", ".35em")
.text(function(d) { return d; });
but my page is not loading.
I not able to figure out what changes I need make to get the legends on the left side of the page.
Try this code. It Will give you required output.
var legend = d3.select("body").append("svg")
.attr("class", "legend")
.attr("width", radius * 2)
.attr("height", radius * 2)
.selectAll("g")
.data(pairs) //Changed this line from your code
.enter().append("g")
.attr("transform", function(d, i) { return "translate(0," + i * 20 + ")"; });
legend.append("rect")
.attr("width", 18)
.attr("height", 18)
.style("fill", color);
legend.append("text")
.attr("x", 24)
.attr("y", 9)
.attr("dy", ".35em")
.text(function(d) { return d.key; });//Changed this line from your code

D3.. trying to add labels to a bar chart, adds all values to each label

I'm relatively new to D3 and trying to add labels to a bar chart.. I keep running into the problem of labels applying all values to each label. Precedding this code is normal data load etc.
// Controls Bar Layout and Offset (x(d.weekOf)+20)
var property = svg.selectAll(".property")
.data(data)
.enter().append("g")
.attr("class", "g")
.attr("transform", function(d) { return "translate(" + (x(d.weekOf)+20) + ",0)"; });
// Theese are the bars, width is the width of the bars
property.selectAll("rect")
.data(function(d) { return d.emissions; })
.enter().append("rect")
.attr("width", "80")
.attr("y", function(d) { return y(d.y1); })
.attr("height", function(d) { return y(d.y0) - y(d.y1); })
.attr("opacity", "0.7")
.style("fill", function(d) { return color(d.name); });
// Add Capacity Labels
property.selectAll("text")
.data(data)
.enter()
.append("text")
.text(function(d, i) {return d.Internal; })
.attr("x", 41)
.attr("y", 210)
.attr("text-anchor", "middle");
Clearly I'm missing something simple..?
Your labels are a subselection of the property selection, so instead of using data() to join each property label to the entire dataset as you are, you should instead use data to join to the corresponding parent datum, like so:
property.selectAll("text")
.data(function(d) {return [d];})
.enter()
.append("text")
.text(function(d, i) {return d.Internal; })
.attr("x", 41)
.attr("y", 210)
.attr("text-anchor", "middle");

D3.js - can clipping paths be used with d3.svg.symbol?

I'm trying to draw multiple 'cross' symbols inside of a circle for use in a visualization. I'd like to draw the crosses in a 'g' tag and then apply a clipping path.
Is it possible to use clip paths with d3.svg.symbol ?
In the below example, the svg circle is masked correctly with the clip path; however the cross (the last part of the code) isn't.
Am I doing something wrong or is this not a feature?
var svg = d3.select("#maskingExample")
.append("svg:svg")
.attr("width", 500)
.attr("height", 200);
svg.append("svg:clipPath")
.attr("id", "clipper")
.append("svg:rect")
.style("stroke", "gray")
.style("fill", "black")
.attr("x", 50)
.attr("y", 25)
.attr("width", 300)
.attr("height", 45);
svg.append("g").append("svg:circle")
.style("stroke", "gray")
.style("fill", "blue")
.attr("cx", 175)
.attr("cy", 55)
.attr("r", 50)
.attr("clip-path", "url(#clipper)");
svg.append("g").append("path")
.attr("d", d3.svg.symbol()
.size( function(d) { return 3000; })
.type( function(d) { return d3.svg.symbolTypes[1]; }))
.attr("transform", "translate(150, 50)")
.attr("clip-path", "url(#clipper")
.style("fill", "black");
You're missing a close paren. Instead of
.attr("clip-path", "url(#clipper")
it should read
.attr("clip-path", "url(#clipper)")

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