I am new to d3 and am trying to draw mean line through all the bars in the bar chart but not quite able to achieve that. Below is my code:
<!DOCTYPE html>
<html>
<head>
<meta charset=utf-8 />
<title>JS Bin</title>
<style>
body {
font: 10px sans-serif;
}
.axis path,
.axis line {
fill: none;
stroke: #000;
shape-rendering: crispEdges;
}
.bar {
fill: steelblue;
}
.x.axis path {
display: none;
}
.line {
fill: none;
stroke: #444;
stroke-width: 1.5px;
}
</style>
</head>
<body>
<script src="//cdnjs.cloudflare.com/ajax/libs/d3/3.4.11/d3.min.js"></script>
<script>
var data=[
{"letter": "BU", "higher": .08,"lower": .05},
{"letter": "AU", "higher": .05,"lower": .03},
{"letter": "LA", "higher": .04,"lower": .02}
]
var margin = {top: 20, right: 20, bottom: 30, left: 40},
width = 960 - margin.left - margin.right,
height = 500 - margin.top - margin.bottom;
var formatPercent = d3.format(".0%");
var x = d3.scale.ordinal()
.rangeRoundBands([0, width], .1);
var x2 = d3.scale.ordinal()
.rangeBands([0, width], 0);
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")
.tickFormat(formatPercent);
var svg = d3.select("body").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 + ")");
data.forEach(function(d) {
d.higher = +d.higher;
d.lower = +d.lower;
});
x.domain(data.map(function(d) { return d.letter; }));
x2.domain(data.map(function(d) { return d.letter; }));
y.domain([0, d3.max(data, function(d) { return d.higher; })]);
svg.append("g")
.attr("class", "x axis")
.attr("transform", "translate(0," + height + ")")
.call(xAxis);
svg.append("g")
.attr("class", "y axis")
.call(yAxis)
.append("text")
.attr("transform", "rotate(-90)")
.attr("y", 6)
.attr("dy", ".71em")
.style("text-anchor", "end")
.text("Frequency");
svg.selectAll(".bar")
.data(data)
.enter().append("rect")
.attr("class", "bar")
.attr("x", function(d) { return x(d.letter); })
.attr("width", x.rangeBand())
.attr("y", function(d) { return y(d.higher); })
.attr("height", function(d) { return height - y(d.higher-d.lower); });
var dataSum = d3.mean(data, function(d) { return (d.higher + d.lower); });
var line = d3.svg.line()
.x(function(d, i) {
return x(d.letter) + i; })
.y(function(d, i) { return y(dataSum/data.length); });
svg.append("path")
.datum(data)
.attr("class", "line")
.attr("d", line);
</script>
</body>
</html>
The proper code is here'http://jsbin.com/beyakumohi/1/edit?html' . The line should pass through center of each bars but it only happens for the 3rd bar and that too it do not cross it. Is there any mistake in my code.
d3.mean will give you the mean value of the full array. Meaning, that in this case you will get the mean of:
data[0].higher + data[0].lower + data[1].higher + data[1].lower + data[2].higher + data[2].lower
In this case I would say it is more appropiate to edit your line function as following
var line = d3.svg.line()
.x(function(d, i) {
return x(d.letter); })
.y(function(d, i) { return y((d.higher + d.lower) / 2); });
Related
I'm trying to add some padding between my bars, but can't control,say understand, it accurately.
Here's the code snippet I'm following from here:
<!DOCTYPE html>
<meta charset="utf-8">
<style>
.bar {
fill: steelblue;
}
.axis text {
font: 10px sans-serif;
}
.axis path,
.axis line {
fill: none;
stroke: #000;
shape-rendering: crispEdges;
}
.x.axis path {
display: none;
}
</style>
<svg class="chart"></svg>
<script src="http://d3js.org/d3.v3.min.js"></script>
<script>
var margin = {top: 20, right: 30, bottom: 30, left: 40},
width = 960 - margin.left - margin.right,
height = 500 - margin.top - margin.bottom;
var x = d3.scale.ordinal()
.rangeRoundBands([0, width], .1);
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 chart = d3.select(".chart")
.attr("width", width + margin.left + margin.right)
.attr("height", height + margin.top + margin.bottom)
.append("g")
.attr("transform", "translate(" + margin.left + "," + margin.top + ")");
d3.tsv("data.tsv", type, function(error, data) {
x.domain(data.map(function(d) { return d.name; }));
y.domain([0, d3.max(data, function(d) { return d.value; })]);
chart.append("g")
.attr("class", "x axis")
.attr("transform", "translate(0," + height + ")")
.call(xAxis);
chart.append("g")
.attr("class", "y axis")
.call(yAxis);
chart.selectAll(".bar")
.data(data)
.enter().append("rect")
.attr("class", "bar")
.attr("x", function(d) { return x(d.name); })
.attr("y", function(d) { return y(d.value); })
.attr("height", function(d) { return height - y(d.value); })
.attr("width", x.rangeBand());
});
function type(d) {
d.value = +d.value; // coerce to number
return d;
}
</script>
Data.dsv file content:
name value
A 12
B 13
C 22
D 5
Then, we you load it and query from developer's console, you know
> x.range()
[24, 258, 492, 726]
> x.rangeBand()
211
, but I wondered how these numbers be determined, the internal calcuation.Any help would be much appreciated!
I've created a line graph with d3.nest() objects, but I need the fill color for each segment to be based on another variable. I thought I could just do it based on the gradient from the data file, but it actually needs to be computed over the distance of the segment. Right now, everything is coming back as one color when it should be
if gradient < -10
color = red
if gradient < -5
color = green
if gradient < 0
color = white
if gradient < 5
color = yellow
if gradient < 10
color = black
else
color = blue
Here's a Plunk
<!DOCTYPE html>
<meta charset="utf-8">
<style>
body {
font: 12px Arial;
}
text.shadow {
stroke: #fff;
stroke-width: 2.5px;
opacity: 0.9;
}
path {
stroke: steelblue;
stroke-width: 2;
fill: none;
}
.axis path,
.axis line {
fill: none;
stroke: grey;
stroke-width: 1;
shape-rendering: crispEdges;
}
.grid .tick {
stroke: lightgrey;
stroke-opacity: 0.7;
shape-rendering: crispEdges;
}
.grid path {
stroke-width: 0;
}
.area {
stroke-width: 0;
}
</style>
<body>
<script src="http://d3js.org/d3.v3.min.js"></script>
<script>
var margin = {top: 30, right: 20, bottom: 35, left: 50},
width = 600 - margin.left - margin.right,
height = 270 - margin.top - margin.bottom;
var color = d3.scale.ordinal()
.domain([-10,-5,0,5,10])
.range(['red','green','white','yellow','black','blue']);
var x = d3.scale.linear().range([0, width]);
var y = d3.scale.linear().range([height, 0]);
var xAxis = d3.svg.axis()
.scale(x)
.orient("bottom")
.ticks(5);
var yAxis = d3.svg.axis()
.scale(y)
.orient("left")
.ticks(5);
var area = d3.svg.area()
.x(function(d) { return x(d.distance); })
.y0(height)
.y1(function(d) { return y(d.elevation); });
var valueline = d3.svg.line()
.x(function(d) { return x(d.distance); })
.y(function(d) { return y(d.elevation); });
var svg = d3.select("body")
.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 + ")");
// function for the x grid lines
function make_x_axis() {
return d3.svg.axis()
.scale(x)
.orient("bottom")
.ticks(5)
}
// function for the y grid lines
function make_y_axis() {
return d3.svg.axis()
.scale(y)
.orient("left")
.ticks(5)
}
// Get the data
d3.csv("data.csv", function(error, data) {
data.forEach(function(d) {
d.distance = +d.distance;
d.elevation = +d.elevation;
d.gradient = +d.gradient;
});
var dataGroup = d3.nest()
.key(function(d) {
return d.grade;
})
.entries(data);
dataGroup.forEach(function(group, i) {
if(i < dataGroup.length - 1) {
group.values.push(dataGroup[i+1].values[0])
}
})
// Scale the range of the data
x.domain(d3.extent(data, function(d) { return d.distance; }));
y.domain([0, d3.max(data, function(d) { return d.elevation; })]);
dataGroup.forEach(function(d, i){
svg.append("path")
.datum(d.values)
.attr("class", "area")
.attr("d", area);
});
svg.selectAll(".area")
.style("fill", function(d) { return color(d.gradient); });
// Draw the x Grid lines
svg.append("g")
.attr("class", "grid")
.attr("transform", "translate(0," + height + ")")
.call(make_x_axis()
.tickSize(-height, 0, 0)
.tickFormat("")
)
// Draw the y Grid lines
svg.append("g")
.attr("class", "grid")
.call(make_y_axis()
.tickSize(-width, 0, 0)
.tickFormat("")
)
// Add the valueline path.
svg.append("path")
.attr("d", valueline(data));
// Add the X Axis
svg.append("g")
.attr("class", "x axis")
.attr("transform", "translate(0," + height + ")")
.call(xAxis);
// Add the Y Axis
svg.append("g")
.attr("class", "y axis")
.call(yAxis);
// Add the text label for the X axis
svg.append("text")
.attr("transform",
"translate(" + (width/2) + " ," +
(height+margin.bottom) + ")")
.style("text-anchor", "middle")
.text("Distance");
// Add the text label for the Y axis
svg.append("text")
.attr("transform", "rotate(-90)")
.attr("y", 6)
.attr("x", margin.top - (height / 2))
.attr("dy", ".71em")
.style("text-anchor", "end")
.text("");
// Add the title
svg.append("text")
.attr("x", (width / 2))
.attr("y", 0 - (margin.top / 2))
.attr("text-anchor", "middle")
.style("font-size", "16px")
.style("text-decoration", "underline")
.text("Elevation Graph");
});
</script>
</body>
The issue is with this call:
svg.selectAll(".area")
.style("fill", function(d) { return color(d.gradient); });
Here, "d" is an array of objects of length one or two depending on the index. I don't know which object's gradient you wish to use, but my naive solution without understanding your data would be to use d[0]. Here's the Plunk.
I'm trying to create a grouped bar chart that can include transitions. I referenced Mike Bostock's grouped bar chart example and have the bar chart transition working but can't get the axis to transition as well. What I'm referring to in this example is the state labels.
I tried following another example posted but I'm baffled as to why I can get it to work. For my example code the transition occurs on click of the SVG
Grouped Bar Chart Reference Example
Axis Reference Example
<!DOCTYPE html>
<meta charset="utf-8">
<style>
body {
font: 10px sans-serif;
}
.axis path,
.axis line {
fill: none;
stroke: #000;
shape-rendering: crispEdges;
}
.bar {
fill: steelblue;
}
.x_axis path {
display: none;
}
</style>
<body>
<script src="http://d3js.org/d3.v3.min.js"></script>
<script>
//Update the flips bars but not the axis
function update() {
var data_update = data.reverse()
x0.domain[data_update]
svg.selectAll(".state")
.data(data_update)
.transition()
.attr("transform", function(d) { return "translate(" + x0(d.State) + ",0)"; });
svg.select(".x_axis")
.transition()
.call(xAxis);
}
d3.select("svg")
.on("click", update)
//The rest of the code
var data
var margin = {top: 20, right: 20, bottom: 30, left: 40},
width = 960 - margin.left - margin.right,
height = 500 - margin.top - margin.bottom;
var x0 = d3.scale.ordinal()
.rangeRoundBands([0, width], .1);
var x1 = d3.scale.ordinal();
var y = d3.scale.linear()
.range([height, 0]);
var color = d3.scale.ordinal()
.range(["#98abc5", "#8a89a6", "#7b6888", "#6b486b", "#a05d56", "#d0743c", "#ff8c00"]);
var xAxis = d3.svg.axis()
.scale(x0)
.orient("bottom");
var svg = d3.select("body").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 + ")");
d3.csv("data.csv", function(error, csv) {
data = csv
var ageNames = d3.keys(data[0]).filter(function(key) { return key !== "State"; });
data.forEach(function(d) {
d.ages = ageNames.map(function(name) { return {name: name, value: +d[name]}; });
});
x0.domain(data.map(function(d) { return d.State; }));
x1.domain(ageNames).rangeRoundBands([0, x0.rangeBand()]);
y.domain([0, d3.max(data, function(d) { return d3.max(d.ages, function(d) { return d.value; }); })]);
svg.append("g")
.attr("class", "x_axis")
.attr("transform", "translate(0," + height + ")")
.call(xAxis);
var state = svg.selectAll(".state")
.data(data)
.enter().append("g")
.attr("class", "state")
.attr("transform", function(d) { return "translate(" + x0(d.State) + ",0)"; });
state.selectAll("rect")
.data(function(d) { return d.ages; })
.enter().append("rect")
.attr("width", x1.rangeBand())
.attr("x", function(d) { return x1(d.name); })
.attr("y", function(d) { return y(d.value); })
.attr("height", function(d) { return height - y(d.value); })
.style("fill", function(d) { return color(d.name); });
});
</script>
I'm a dummy and figured it out.
Calling the .domain method on an array of objects is useless. I forgot to map the object array to get the value of the states
x0.domain(data_update.map(function(d) { return d.State; }))
Full Code below for those curious
<!DOCTYPE html>
<meta charset="utf-8">
<style>
body {
font: 10px sans-serif;
}
.axis path,
.axis line {
fill: none;
stroke: #000;
shape-rendering: crispEdges;
}
.bar {
fill: steelblue;
}
.x_axis path {
display: none;
}
</style>
<body>
<script src="http://d3js.org/d3.v3.min.js"></script>
<script>
var data
var margin = {top: 20, right: 20, bottom: 30, left: 40},
width = 960 - margin.left - margin.right,
height = 500 - margin.top - margin.bottom;
var x0 = d3.scale.ordinal()
.rangeRoundBands([0, width], .1);
var x1 = d3.scale.ordinal();
var y = d3.scale.linear()
.range([height, 0]);
var color = d3.scale.ordinal()
.range(["#98abc5", "#8a89a6", "#7b6888", "#6b486b", "#a05d56", "#d0743c", "#ff8c00"]);
var xAxis = d3.svg.axis()
.scale(x0)
.orient("bottom");
var yAxis = d3.svg.axis()
.scale(y)
.orient("left")
.tickFormat(d3.format(".2s"));
var svg = d3.select("body").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 + ")");
d3.csv("data.csv", function(error, csv) {
data = csv
var ageNames = d3.keys(data[0]).filter(function(key) { return key !== "State"; });
data.forEach(function(d) {
d.ages = ageNames.map(function(name) { return {name: name, value: +d[name]}; });
});
x0.domain(data.map(function(d) { return d.State; }));
x1.domain(ageNames).rangeRoundBands([0, x0.rangeBand()]);
y.domain([0, d3.max(data, function(d) { return d3.max(d.ages, function(d) { return d.value; }); })]);
svg.append("g")
.attr("class", "x_axis")
.attr("transform", "translate(0," + height + ")")
.call(xAxis);
svg.append("g")
.attr("class", "y axis")
.call(yAxis)
.append("text")
.attr("transform", "rotate(-90)")
.attr("y", 6)
.attr("dy", ".71em")
.style("text-anchor", "end")
.text("Population");
var state = svg.selectAll(".state")
.data(data, function(d) {return d.State})
.enter().append("g")
.attr("class", "state")
.attr("transform", function(d) { return "translate(" + x0(d.State) + ",0)"; });
state.selectAll("rect")
.data(function(d) { return d.ages; })
.enter().append("rect")
.attr("width", x1.rangeBand())
.attr("x", function(d) { return x1(d.name); })
.attr("y", function(d) { return y(d.value); })
.attr("height", function(d) { return height - y(d.value); })
.style("fill", function(d) { return color(d.name); });
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; });
});
//Update the flips bars
function update() {
data.reverse()
x0.domain(data.map(function(d) { return d.State; }))
svg.selectAll(".state")
.data(data, function(d) {return d.State})
.transition()
.attr("transform", function(d) { return "translate(" + x0(d.State) + ",0)"; });
svg.select(".x_axis")
.transition()
.call(xAxis);
}
d3.select("svg")
.on("click", update)
</script>
I am trying to create multiple series in d3 with different fill colors for the area in between the lines for each series. I have successfully gotten the first series in, and I am confident I can create multiple series, but I can't figure out how to append the fill color of just that series. I've tried to do something along the lines of: .attr("fill","red"); to append the area but this doesn't work. Here is my full code:
<!DOCTYPE html>
<meta charset="utf-8">
<style>
body {
font: 10px sans-serif;
}
.axis path,
.axis line {
fill: none;
stroke: #000;
shape-rendering: crispEdges;
}
.x.axis path {
display: none;
}
.area {
fill: steelblue;
}
</style>
<body>
<script src="http://d3js.org/d3.v3.js"></script>
<script>
var margin = {top: 20, right: 20, bottom: 30, left: 50},
width = 960 - margin.left - margin.right,
height = 500 - margin.top - margin.bottom;
var parseDate = d3.time.format("%H:%M:%S").parse;
var x = d3.time.scale()
.range([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 line = d3.svg.line()
.x(function(d) { return x(d.date); })
.y(function(d) { return y(d.close); });
var area = d3.svg.area()
.x(function(d) { return x(d.date); })
.y0(function(d) { return y(d.low); })
.y1(function(d) { return y(d.high); });
var svg = d3.select("body").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 context = svg.append("g")
.attr('class','container')
d3.csv("data.csv", function(error, data) {
data.forEach(function(d) {
d.date = parseDate(d.date);
d.high = +d.positive;
d.low = +d.positivelow;
});
x.domain(d3.extent(data, function(d) { return d.date; }));
<!--y.domain(d3.extent(data, function(d) { return d.close; }));-->
<!--y.domain([d3.min(data, function(d) { return d.low; }), d3.max(data, function(d) { return d.high; })]);-->
y.domain([1720,1780])
svg.append("path")
.datum(data)
.attr("class", "area")
.attr("d", area);
<!--(This line below doesn't work)-->
<!--.attr("fill","red");-->
svg.append("g")
.attr("class", "x axis")
.attr("transform", "translate(0," + height + ")")
.call(xAxis);
svg.append("g")
.attr("class", "y axis")
.call(yAxis)
.append("text")
.attr("transform", "rotate(-90)")
.attr("y", 6)
.attr("dy", ".71em")
.style("text-anchor", "end")
.text("Some Y Title");
});
</script>
When running the following code:
<!DOCTYPE html>
<meta charset="utf-8">
<style>
body {
font: 10px sans-serif;
}
.axis path,
.axis line {
fill: none;
stroke: #000;
shape-rendering: crispEdges;
}
.x.axis path {
display: none;
}
.line {
fill: none;
stroke: steelblue;
stroke-width: 1.5px;
}
</style>
<body>
<script src="http://d3js.org/d3.v3.js"></script>
<script>
var margin = {top: 20, right: 20, bottom: 30, left: 50},
width = 960 - margin.left - margin.right,
height = 500 - margin.top - margin.bottom;
var parseDate = d3.time.format("%e-%m-%Y").parse;
var x = d3.time.scale()
.range([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 line = d3.svg.line()
.x(function(d) { return x(d.date); })
.y(function(d) { return y(d.value); });
var svg = d3.select("body").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 + ")");
d3.csv("http://localhost/webserver/data/downloads.csv", function(error, data) {
data.forEach(function(d) {
d.date = parseDate(d.date);
d.value = +d.value;
});
x.domain(d3.extent(data, function(d) { return d.date; }));
y.domain(d3.extent(data, function(d) { return d.value; }));
svg.append("g")
.attr("class", "x axis")
.attr("transform", "translate(0," + height + ")")
.call(xAxis);
svg.append("g")
.attr("class", "y axis")
.call(yAxis)
.append("text")
.attr("transform", "rotate(-90)")
.attr("y", 6)
.attr("dy", ".71em")
.style("text-anchor", "end")
.text("Price ($)");
svg.append("path")
.datum(data)
.attr("class", "line")
.attr("d", line);
});
</script>
I get the following error:
Uncaught TypeError: Cannot read property 'length' of undefined d3.v3.js:7296
That line has the following description:
function d3_time_parse(date, template, string, j) {
var c, p, i = 0, n = template.length, m = string.length;
My source data looks like the following:
Date;Value
23-4-2012;12
24-4-2012;10
25-4-2012;13
26-4-2012;24
27-4-2012;45
your csv should have comma , as a separator and attributes are case sensitive. Try this:
date,value
23-4-2012,12
24-4-2012,10
25-4-2012,13
26-4-2012,24
27-4-2012,45