I am doing a dot plot in D3 and I want to add the values along a right Y axis. I have done this before in many charts, adding labels is straightforward, but for some reason this particular chart is giving a lot of problems.
I cant get the values of the dots to show on the right axis.
jsfiddle:
The chart appears on click.
The relevant code for the value labels attached to the right axis:
svg.append("g")
.attr("class", "y axis")
.attr("transform", "translate(" + (width + 10) + " ,0)")
.call(yAxis1)
.selectAll('text')
.text(function(d){ return xScale(d.value); });
With an ordinal axis you are binding your domain values to the axis ticks. So, the scale domain should be:
var yScale1 = d3.scale.ordinal()
.domain(data.map(function(d) { return d.value; })) //<-- use '.value'
.rangeRoundPoints([0, height]);
Then your y-axis call just becomes:
svg.append("g")
.attr("class", "y axis")
.attr("transform", "translate(" + (width + 10) + " ,0)")
.call(yAxis1);
Updated fiddle.
Related
I am building a dot plot histogram with d3.js v3 and I have pretty much finished everything up - except for whatever reason some of my data points are duplicating (certain circles repeating themselves - not all of them, just some). I tried tweaking the axis parameters, as well as the data itself [deleted rows with null values, etc]- however sadly to no avail.
Any help would be immensely appreciated.
Here's my relevant code:
<div id="dotHappy"></div>
var data = d3.csv('happy_dot_modified.csv', function(data) {
data.forEach(function(d) {
d["city"] = d["city"];
d["Happy"] = +d["Happy"];
d["thc"] = +d["thc"];
});
var margin = {
top: 30,
right: 20,
bottom: 30,
left: 50
},
width = 1560 - margin.left - margin.right,
height = 1260 - margin.top - margin.bottom;
I tried this coder block but it wasn't working. (Not sure if this is even what's giving me the issue anyways - perhaps not).
// var x = d3.scale.linear()
// .range([0, width]);
So I went with this:
var x = d3.scale.ordinal()
.rangePoints([0, width])
var y = d3.scale.linear()
.range([height, 0]);
var xAxis = d3.svg.axis()
.scale(x)
.orient("bottom");
var yAxis = d3.svg.axis()
.scale(y)
.orient("left");
var svg = d3.select("#dotHappy")
.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 + ")");
var chart = svg.append("g")
.attr("id", "chart");
Also tried tweaking this, which may or may not even be part of the problem.
x.domain(data.map(d => d.Happy));
y.domain([5, 33]);
// y.domain(data.map(d => d.city));
svg.append("g")
.attr("class", "x axis")
.attr("transform", "translate(0," + height + ")")
.call(xAxis)
// .append("text")
.attr("class", "label")
.attr("x", width)
.attr("y", -6)
.style("text-anchor", "end")
.text("Happy");
svg.append("g")
.attr("class", "y axis")
// .attr("transform", "translate(0," + width + ")")
.call(yAxis)
// .append("text")
.attr("class", "label")
.attr("transform", "rotate(-90)")
.attr("y", 6)
.attr("dy", ".71em")
.style("text-anchor", "end")
.text("THC");
var groups = svg.selectAll(".groups")
.data(data)
.enter()
.append("g")
.attr("transform", function(d) {
return "translate(" + x(d.Happy) + ".0)";
});
var dots = groups.selectAll("circle")
.data(function(d) {
return d3.range(1, +d.thc + 1)
// return d3.range(d.thc)
})
.enter().append("circle")
.transition().duration(1000)
.attr("class", "dot")
.attr("r", 10)
.attr("cy", function(d) {
return y(d)
})
.style("fill", "blue")
.style("opacity", 1);
})
Here is a snapshot of my csv file:
city. |. Happy. | thc
Boston. 37. 23
NYC. 22. 30
Chicago. 88. 5
Following is a screenshot of what it currently looks like. So in this case, the tooltip displaying the text box 'The Sister' should be only for one circle (because it should only be one data point), however if you hover over the other 10 orange circles below it, it's all the same - indicating it has been repeated 11 times total:
Actually, all of the circles are repeating vertically. You may not see them all because the repeated circles are being overlapped by other colored circles as these other circles get drawn. For example, the yellow data point "The Sister" is repeating all the way down to the bottom, but the data points below the yellow ones, in blue, pink, green, blue, etc., drew themselves on top of the yellow repeats.
The culprit is this code:
.selectAll("circle")
.data(function(d) {
return d3.range(1, +d.thc + 1)
// return d3.range(d.thc)
})
.enter().append("circle")
which, if you don't want it to repeat, should have been just one line:
.append("circle")
To explain what happened, this code:
var groups = svg.selectAll(".groups")
.data(data)
.enter()
.append("g")
.attr("class", "groups") //NOTE: you should add this line since you have 'selectAll(".groups")'
.attr("transform", function(d) {
return "translate(" + x(d.Happy) + ".0)";
});
already creates a g element for every row in the csv file. And for every g, you created an array using d3.range(1, +d.thc + 1), and appended a circle for each item in that array.
As an example, let's take the row representing "The Sister" data point that has a THC of 33. For that one data point, the code creates one <g>, inside of which it binds the array [1, 2, 3, ..., 33], and therefore appends 33 circles to the <g> element, with the cy attribute between y(1) and y(33).
Now, the question that follows is that, you specified a domain with a minimum of 5 with y.domain([5, 33]). Yet the data-bounded array, generated with d3.range, always begins with 1 and increments up to the value of THC. So some of the values in the array (1,2,3, and 4) always fall outside the y-axis, but d3 was able to translate it to a proper y-position. Is that possible? By default, yes, d3.scale extrapolates when the data is outside of the domain.
By default, clamping is disabled, such that if a value outside the input domain is passed to the scale, the scale may return a value outside the output range through linear extrapolation. For example, with the default domain and range of [0,1], an input value of 2 will return an output value of 2.
I'm create a line chart using D3 v4 and the labels X are overlapping.
// Add the X Axis
var xAxis = svg.append("g")
.attr("class", "x axis")
.attr("transform", "translate(0," + height + ")")
.call(d3.axisBottom(x)
.tickValues(data.map(d=>d.date))
.tickFormat(d3.timeFormat("%d/%m %H:%M")))
.selectAll("text")
.attr("transform", "rotate(90)")
.attr("dy", ".35em")
.attr("y", 0)
.attr("x", 9)
.style("text-anchor", "start");
The full code is here: JSFiddle
Do not use given tick values. The data points near the right end of the chart are too close to each other for doing this. Just remove this line
.tickValues(data.map(d=>d.date))
Show the exact times in a tooltip if they are important.
I need to align x-axis labels as shown in the snapshot below:
I tried:
.attr("transform", function(d) {
return "rotate(-90)"
})
But it rotated the whole axis/scale.
How do I fix this?
jsFiddle
EDIT:
I updated my code:
svg.append("g")
.attr("class", "x axis")
.attr("transform", "translate(0," + height + ")")
.call(xAxis)
.selectAll("text")
.style("text-anchor", "end")
.attr("dx", "0em")
.attr("dy", "0em")
.attr("transform", function(d) {
return "rotate(-90)"
});
Now the labels are rotated to -90 degrees. How do I get it onto the bars?
jsFiddle
You need to rotate only text, and then translate it properly. See the updated fiddle:
svg.selectAll('.tick')
.select('text')
.attr('transform', 'rotate(-90) translate(50, -12)');
http://jsfiddle.net/MjFgK/18/
I'm not that good in using translate. But this fiddle just works fine.
Reason why the whole axis/scale got rotated is because when the text being created with x and y position, the origin point of it becomes (0,0).
So to rotate your text labels you need to position those text using translate instead of x and y.
In the fiddle I've added the below code at the bottom where it text labels are being rotated.
If you wanted to rotate it more. You can just change the degree of rotation.
svg.selectAll(".text")
.data(data)
.enter()
.append("text")
.attr("transform", function(d, i) {
return "translate(" + (35 + x(d.age)) + ", 250)" + "rotate(-90)"
})
.text(function(d) { return d.age; })
Hope this helps for you.
I am using d3.js for scatter plot,I want to plot x and y axis such that they intersect at point(100,75).how to do this?
I am using
svg.append("g")
.attr("class", "axis")
.attr("transform", "translate(0," + (padding+223) + ")")
.call(xAxis2);
//Create Y2 axis
svg.append("g")
.attr("class", "axis")
.attr("transform", "translate(" + (padding+200) + ",0)")
.call(yAxis2);
But this will not change according to the scale,and I have used variable for scale.
Please let me know if you need more information.
You would need to offset the axes by the respective amount, which you can determine using the scales of the axes, i.e.
svg.append("g")
.attr("class", "axis")
.attr("transform", "translate(0," + yScale(75) + ")")
.call(xAxis2);
and similarly for the y axis. You may have to tweak the offset slightly to account for other offsets, labels etc.
How do I add text labels to axes in d3?
For instance, I have a simple line graph with an x and y axis.
On my x-axis, I have ticks from 1 to 10. I want the word "days" to appear underneath it so people know the x axis is counting days.
Similarly, on the y-axis, I have the numbers 1-10 as ticks, and I want the words "sandwiches eaten" to appear sideways.
Is there a simple way to do this?
Axis labels aren't built-in to D3's axis component, but you can add labels yourself simply by adding an SVG text element. A good example of this is my recreation of Gapminder’s animated bubble chart, The Wealth & Health of Nations. The x-axis label looks like this:
svg.append("text")
.attr("class", "x label")
.attr("text-anchor", "end")
.attr("x", width)
.attr("y", height - 6)
.text("income per capita, inflation-adjusted (dollars)");
And the y-axis label like this:
svg.append("text")
.attr("class", "y label")
.attr("text-anchor", "end")
.attr("y", 6)
.attr("dy", ".75em")
.attr("transform", "rotate(-90)")
.text("life expectancy (years)");
You can also use a stylesheet to style these labels as you like, either together (.label) or individually (.x.label, .y.label).
In the new D3js version (version 3 onwards), when you create a chart axis via d3.svg.axis() function you have access to two methods called tickValues and tickFormat which are built-in inside the function so that you can specifies which values you need the ticks for and in what format you want the text to appear:
var formatAxis = d3.format(" 0");
var axis = d3.svg.axis()
.scale(xScale)
.tickFormat(formatAxis)
.ticks(3)
.tickValues([100, 200, 300]) //specify an array here for values
.orient("bottom");
If you want the y-axis label in the middle of the y-axis like I did:
Rotate text 90 degrees with text-anchor middle
Translate the text by its midpoint
x position: to prevent overlap of y-axis tick labels (-50)
y position: to match the midpoint of the y-axis (chartHeight / 2)
Code sample:
var axisLabelX = -50;
var axisLabelY = chartHeight / 2;
chartArea
.append('g')
.attr('transform', 'translate(' + axisLabelX + ', ' + axisLabelY + ')')
.append('text')
.attr('text-anchor', 'middle')
.attr('transform', 'rotate(-90)')
.text('Y Axis Label')
;
This prevents rotating the whole coordinate system as mentioned by lubar above.
If you work in d3.v4, as suggested, you can use this instance offering everything you need.
You might just want to replace the X-axis data by your "days" but remember to parse string values correctly and not apply concatenate.
parseTime might as well do the trick for days scaling with a date format ?
d3.json("data.json", function(error, data) {
if (error) throw error;
data.forEach(function(d) {
d.year = parseTime(d.year);
d.value = +d.value;
});
x.domain(d3.extent(data, function(d) { return d.year; }));
y.domain([d3.min(data, function(d) { return d.value; }) / 1.005, d3.max(data, function(d) { return d.value; }) * 1.005]);
g.append("g")
.attr("class", "axis axis--x")
.attr("transform", "translate(0," + height + ")")
.call(d3.axisBottom(x));
g.append("g")
.attr("class", "axis axis--y")
.call(d3.axisLeft(y).ticks(6).tickFormat(function(d) { return parseInt(d / 1000) + "k"; }))
.append("text")
.attr("class", "axis-title")
.attr("transform", "rotate(-90)")
.attr("y", 6)
.attr("dy", ".71em")
.style("text-anchor", "end")
.attr("fill", "#5D6971")
.text("Population)");
fiddle with global css / js
D3 provides a pretty low-level set of components that you can use to assemble charts. You are given the building blocks, an axis component, data join, selection and SVG. It's your job to put them together to form a chart!
If you want a conventional chart, i.e. a pair of axes, axis labels, a chart title and a plot area, why not have a look at d3fc? it is an open source set of more high-level D3 components. It includes a cartesian chart component that might be what you need:
var chart = fc.chartSvgCartesian(
d3.scaleLinear(),
d3.scaleLinear()
)
.xLabel('Value')
.yLabel('Sine / Cosine')
.chartLabel('Sine and Cosine')
.yDomain(yExtent(data))
.xDomain(xExtent(data))
.plotArea(multi);
// render
d3.select('#sine')
.datum(data)
.call(chart);
You can see a more complete example here: https://d3fc.io/examples/simple/index.html
chart.xAxis.axisLabel('Label here');
or
xAxis: {
axisLabel: 'Label here'
},