I am trying to use the bubble chart example as a template to build a visualisation. I have my JSON as a flat-hierarchy, such that there is one element called children and that holds an array of objects that I want to visualise.
The JSON looks like this:
{
"children":[
{
"acc":"Q15019",
"uid":"SEPT2_HUMAN",
"sym":"SEPT2",
"name":"Septin-2",
"alt_ids":"",
"ratio":0.5494271087884398,
"pval":0.990804718
},
...,
{
"acc":"Q16181",
"uid":"SEPT7_HUMAN",
"sym":"SEPT7",
"name":"Septin-7",
"alt_ids":"",
"ratio":1.1949912048567823,
"pval":0.511011887
}
]
}
I have modified the example code as follows:
var diameter = 960,
format = d3.format(",d"),
color = d3.scale.quantile().range(colorbrewer.RdBu[9]);
var bubble = d3.layout.pack()
.sort(null)
.size([diameter, diameter])
.padding(1.5);
var svg = d3.select("body").append("svg")
.attr("width", diameter)
.attr("height", diameter)
.attr("class", "bubble");
d3.json("datagraph.json", function(datagraph) {
var node = svg.selectAll(".node")
.data(bubble.nodes(datagraph))
.enter().append("g")
.attr("class", "node")
.attr("id", function(d) { return d.acc; })
.attr("transform", function(d) { return "translate(" + d.x + "," + d.y + ")"; });
//node.append("title").text(function(d) { return d.className + ": " + format(d.value); });
node.append("circle")
.attr("r", function(d) { return 30; })
.style("fill", function(d) {
if(d.ratio == null)
return "#ffffff";
else
return color(d.ratio);
});
node.append("text")
.attr("dy", ".3em")
.style("text-anchor", "middle")
.text(function(d) { return d.acc; });
});
The resultant HTML has a ton of <g> tags responding to each element except they are never translated to the right position, but instead sort of sit on top of each other on the top left corner. By investigating in Firebug, I figured this happens presumably because the pack() algorithm does not get the objects one at a time, but the whole array as a single element, thus individual elements don't get .x and .y values.
If I change the .nodes() argument to datagraph.children I get the elements one at a time in nodes() iteration, but oddly enough I get a single <g> object. Since I don't need to flatten a hierarchy I skipped the classes(root) function, in the example. What I am wondering is whether or not the packageName attribute plays any role in the nodes()?
How can I resolve this issue?
You haven't specified a value accessor:
var bubble = d3.layout.pack()
.sort(null)
.size([diameter, diameter])
.padding(1.5)
.value(function(d) { return d.pval; }) //<- must return a number
Example here.
Related
enter code here I have a JSON File from which I want to create a d3 directed
graph with arrows in the direction of higher influence score
{"nodes":[{"Name":"GJA","influenceScore":81.0,"type":10.0},
{"Name":"JJZ","influenceScore":82.6,"type":30.0},
{"Name":"SAG","influenceScore":89.0,"type":30.0},
{"Name":"JJZ","influenceScore":82.6,"type":30.0}],"links":
[{"source":0,"target":0,"type":"SA","value":1},
{"source":0,"target":1,"type":"SA","value":1},
{"source":0,"target":2,"type":"SA","value":1},
{"source":0,"target":3,"type":"SA","value":1}]}
I am a d3novice, so would like some help from experts here
My d3 code is here:
.link {
stroke: #ccc;
}
.node text {
pointer-events: none;
font: 12px sans-serif;
}
</style>
<body>
<script src="//d3js.org/d3.v3.min.js"></script>
<script>
var width = 1200,
height = 900;
var color = d3.scale.category10();
var fill = d3.scale.category10();
var svg = d3.select("body").append("svg")
.attr("width", width)
.attr("height", height);
var force = d3.layout.force()
.gravity(0.052)
.distance(350)
.charge(-20)
.size([width, height]);
d3.json("\\abc.json", function(error, json) {
if (error) throw error;
force
.nodes(json.nodes)
.links(json.links)
.start();
var link = svg.selectAll(".link")
.data(json.links)
.enter().append("line")
.attr("class", "link").style("stroke-width", function(d) { return
Math.sqrt(d.value); }).style("stroke", function(d) {return
fill(d.value);});
var node = svg.selectAll(".node")
.data(json.nodes)
.enter().append("g")
.attr("class", "node")
.call(force.drag);
node.append("circle")
.attr("class", "node")
.attr("r", function(d) { return (d.influenceScore/10) + 10;
}).style("fill", function(d) { return color(d.type); });
node.append("text")
.attr("dx", -35)
.attr("dy", "4.5em").text(function(d) { return d.Name });
node.append("title").text(function(d) { return d.Name ;});
force.on("tick", function() {
link.attr("x1", function(d) { return d.source.x; })
.attr("y1", function(d) { return d.source.y; })
.attr("x2", function(d) { return d.target.x; })
.attr("y2", function(d) { return d.target.y; });
node.attr("transform", function(d) { return "translate(" + d.x + "," + d.y +
")"; });
});
});
I am getting the following image
I would like the target node e.g JJZ here just to occur once ( currently it's occurring as many number of times as it is repeated in the JSON i.e 2 times in the given example) however the line joining the two nodes should increase in thickness depending on the number of times the nodes repeat. so the blue line linking JJZ with GJA should be thicker than GJA and SAG and if another node occurs 5 times that should be thicker than JJZ and GJA. Also how do I insert directed arrows in the direction of a higher influence score
Your question here has little to do with D3: you can manipulate your array with plain JavaScript.
This function looks for the objects on json.nodes based on the property Name. If it doesn't exist, it pushes the object into an array that I named filtered. If it already exists, it increases the value of count in that object:
var filtered = []
json.nodes.forEach(function(d) {
if (!this[d.Name]) {
d.count = 0;
this[d.Name] = d;
filtered.push(this[d.Name])
}
this[d.Name].count += 1
}, Object.create(null))
Here is the demo:
var json = {"nodes":[{"Name":"GJA","influenceScore":81.0,"type":10.0},
{"Name":"JJZ","influenceScore":82.6,"type":30.0},
{"Name":"SAG","influenceScore":89.0,"type":30.0},
{"Name":"JJZ","influenceScore":82.6,"type":30.0}],"links":
[{"source":0,"target":0,"type":"SA","value":1},
{"source":0,"target":1,"type":"SA","value":1},
{"source":0,"target":2,"type":"SA","value":1},
{"source":0,"target":3,"type":"SA","value":1}]};
var filtered = []
json.nodes.forEach(function(d){
if(!this[d.Name]){
d.count = 0;
this[d.Name] = d;
filtered.push(this[d.Name])
}
this[d.Name].count += 1
}, Object.create(null))
console.log(filtered)
Then, you just need to use the property count to set the stroke-width of your links.
I'm building a bubble chart from d3js but keep receiving a TypeError: undefined is not a function with the enter() method. I've tried just about everything and I can't determine why this error is being produced besides the fact that the filter method is returning null. Currently the bubble chart itself is not displayed.
var diameter = 310,
format = d3.format(",d"),
color = d3.scale.category20c();
var bubble = d3.layout.pack()
.sort(null)
.size([diameter, diameter])
.padding(1.5);
var svg = d3.select("bubble")
.append("svg")
.attr("width", diameter)
.attr("height", diameter)
.attr("class", "bubble");
var node = svg.selectAll(".node")
.data(bubble.nodes({children: [{packageName: "food", className: "food", value: 100}]}))
.filter(function(d) { return !d.children; })
// ================================
// This is causing the error below
// ================================
.enter()
.append("g")
.attr("class", "node")
.attr("transform", function(d) { return "translate(" + d.x + "," + d.y + ")"; });
node.append("title")
.text(function(d) { return d.className + ": " + format(d.value); });
node.append("circle")
.attr("r", function(d) { return d.r; })
.style("fill", function(d) { return color(d.packageName); });
node.append("text")
.attr("dy", ".3em")
.style("text-anchor", "middle")
.text(function(d) { return d.className.substring(0, d.r / 3); });
d3.select(self.frameElement).style("height", diameter + "px");
JsFiddle: http://jsfiddle.net/26Tra/
In your data binding, you are using keys such as packageName and className that are generated by the classes function, which is missing from your code. I added it and now your data binding is correct:
var node = svg.selectAll(".node")
.data(bubble.nodes(classes(root)).filter(function (d) {return !d.children;}))
.enter()
...
NOTE: because I mocked some very simple data, with only one packageName, fruits, I used className instead of packageName for the coloring. I also changed the color category to category10() to give it more contrast.
Complete FIDDLE.
I'm drawing a little clickable graph data browser.
Example:
First, I load a few movies, and I see this:
Then, after I click on one of the nodes (Hellraiser, in this case), I use ajax to load additional related information properties and values, and end up with this:
The lines and circles of the newly added nodes are obviously drawn after the originally clicked node was.
Here is the draw method that gets called every time new data is ready to be added to the graph:
function draw() {
force.start();
//Create edges as lines
var edges = svg.selectAll("line")
.data(dataset.edges)
.enter()
.append("line")
.style("stroke", "#ccc")
.style("stroke-width", 2)
.on("mouseover", lineMouseover)
.on("mouseout", lineMouseout);
//create the nodes
var node = svg.selectAll(".node")
.data(dataset.nodes)
.enter()
.append("g")
.attr("class", "node")
.on("click", callback)
.attr("r", function(d, i) { //custom sizes based on datatype
if(d.datatype && (d.datatype in _design) ) {
return _design[d.datatype].size;
} else {
return _design["other"].size;
}
})
.call(force.drag);
//create fancy outlines on the nodes
node.append("circle")
.attr("r", function(d,i) { //custom sizes based on datatype
if(d.datatype && (d.datatype in _design) ) {
return _design[d.datatype].size * r;
} else {
return _design["other"].size * r;
}
})
.style("stroke", "black")
.style("stroke-width", 3)
.style("fill", function(d, i) { //custom color based on datatype
if(d.datatype && (d.datatype in _design) ) {
return _design[d.datatype].color;
} else {
return _design["other"].color;
}
})
.attr("class","circle");
//Add text to each node.
node.append("text")
.attr("dx", 0)
.attr("dy", ".25em")
//.attr("class", "outline")
.attr("fill", "black")
.text(function(d, i) {
return d.name;//d.name
});
};
How do I go about drawing those lines underneath the clicked node?
You can group the different kinds of elements below g elements that you can create at the beginning in the required order. This way, anything you append to them later will be ordered correctly:
var links = svg.append("g"),
nodes = svg.append("g"),
labels = svg.append("g");
// ...
var edges = links.selectAll("line")
.data(dataset.edges)
.enter()
.append("line");
var node = nodes.selectAll(".node")
.data(dataset.nodes)
.enter()
.append("g")
// etc.
I'm trying to get the widths of a bunch of text elements I have created with d3.js
This is how I'm creating them:
var nodesText = svg.selectAll("text")
.data(dataset)
.enter()
.append("text")
.text(function(d) {
return d.name;
})
.attr("x", function(d, i) {
return i * (w / dataset.length);
})
.attr("y", function(d) {
return 45;
});
I'm then using the width to create rectangles the same size as the text's boxes
var nodes = svg.selectAll("rect")
.data(dataset)
.enter()
.append("rect")
.attr("x", function(d, i) {
return i * (w / dataset.length);
})
.attr("y", function(d) {
return 25;
})
.attr("width", function(d, i) {
//To Do: find width of each text element, after it has been generated
var textWidth = svg.selectAll("text")
.each(function () {
return d3.select(this.getComputedTextLength());
});
console.log(textWidth);
return textWidth;
})
.attr("height", function(d) {
return 30;
})
I tried using the Bbox method from here but I don't really understand it. I think selecting the actual element is where I'm going wrong really.
I would make the length part of the original data:
var nodesText = svg.selectAll("text")
.data(dataset)
.enter()
.append("text")
.text(function(d) {
return d.name;
})
.attr("x", function(d, i) {
return i * (w / dataset.length);
})
.attr("y", function(d) {
return 45;
})
.each(function(d) {
d.width = this.getBBox().width;
});
and then later
var nodes = svg.selectAll("rect")
.data(dataset)
.enter()
.append("rect")
.attr("width", function(d) { return d.width; });
You can use getBoundingClientRect()
Example:
.style('top', function (d) {
var currElemHeight = this.getBoundingClientRect().height;
}
edit: seems like its more appropriate for HTML elements. for SVG elements you can use getBBbox() instead.
d3.selectAll returns a selection. You can get each of the elements by navigating through the array in the _groups property. When you are determining the width of a rectangle, you can use its index to get the corresponding text element:
.attr('width', function (d, i) {
var textSelection = d3.selectAll('text');
return textSelection._groups[0][i].getComputedTextLength();
});
The _groups property of d3's selection has a list of nodes at [0]. This list contains all of the selected elements, which you can access by index. It's important that you get the SVG element so that you can use the getComputedTextLength method.
You may also want to consider creating the rect elements first, then the text elements, and then going back to the rectangles to edit the width attribute, so that the text elements are on top of the rectangles (in case you want to fill the rectangles with color).
Update:
It's typically preferred that you don't access _groups, though, so a safer way to get the matching text element's width would be:
.attr('width', function (d, i) {
return d3.selectAll('text').filter(function (d, j) { return i === j; })
.node().getComputedTextLength();
});
Using node safely retrieves the element, and filter will find the text element which matches index.
I have a data variable which contains the following:
[Object { score="2.8", word="Blue"}, Object { score="2.8", word="Red"}, Object { score="3.9", word="Green"}]
I'm interested in modifying a piece of a D3 graph http://bl.ocks.org/3887051 to display the legend, which would be the list of the "word", for my data set.
The legend script looks like this (from link above):
var ageNames = d3.keys(data[0]).filter(function(key) { return key !== "State"; });
var legend = svg.selectAll(".legend")
.data(ageNames.slice().reverse())
.enter().append("g")
.attr("class", "legend")
.attr("transform", function(d, i) { return "translate(0," + i * 20 + ")"; });
legend.append("rect")
.attr("x", width - 18)
.attr("width", 18)
.attr("height", 18)
.style("fill", color);
legend.append("text")
.attr("x", width - 24)
.attr("y", 9)
.attr("dy", ".35em")
.style("text-anchor", "end")
.text(function(d) { return d; });
How do I modify their ageNames function to display the "word" set from my data? I'm not sure how they're utilizing the d3.keys. Is there another way to do it?
This should work more or less, but you may need to reverse() (as the original example does) or otherwise rearrange the elements of words, in order to correctly map a word to the right color. Depends on how you've implemented your graph.
var words = yourDataArray.map(function(entry) { return entry.word; });
var legend = svg.selectAll(".legend")
.data(words)
// The rest stays the same