Unable to generate grid lines - javascript

I have been trying to obtain grid lines in my chart I have been going through d3 tips and tricks by d3noob. Help me if my code is wrong
Style
body {
font: 12px Arial;
}
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;
opacity: 0.7;
}
.grid path {
stroke-width: 0;
}
Code
<body>
<!-- load the d3.js library -->
<script src="d3.v3.min.js"></script>
<script>
// Set the dimensions of the canvas / graph
Var margin = {
top: 30,
right: 20,
bottom: 30,
left: 50
},
width = 400 - margin.left - margin.right,
height = 200 - margin.top - margin.bottom;
// Parse the date / time
var parseDate = d3.time.format("%d-%b-%y").parse;
// Set the ranges
var x = d3.time.scale().range([0, width]);
var y = d3.scale.linear().range([height, 0]);
// Define the axes
var xAxis = d3.svg.axis().scale(x)
.orient("bottom").ticks(5);
var yAxis = d3.svg.axis().scale(y)
.orient("left").ticks(5);
// Define the line
var valueline = d3.svg.line()
.interpolate("bundle")
.x(function(d) {
return x(d.date);
})
.y(function(d) {
return y(d.close);
});
// Adds the svg canvas
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 make_x_axis() {
return d3.svg.axis()
.scale(x)
.orient("bottom")
.ticks(5)
}
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.date = parseDate(d.date);
d.close = +d.close;
});
// Scale the range of the data
x.domain(d3.extent(data, function(d) {
return d.date;
}));
y.domain([0, d3.max(data, function(d) {
return d.close;
})]);
// Add the valueline path.
svg.append("path")
.attr("class", "line")
.attr("d", valueline(data));
// Add the X Axis
svg.append("g")
.attr("class", "x axis")
.attr("transform", "translate(0," + height + ")")
.call(xAxis);
svg.append("text") // text label for the x axis
.attr("transform", "translate(" + (width / 2) + " ," + (height + margin.bottom) + ")")
.style("text-anchor", "middle")
.text("Date");
// Add the Y Axis
svg.append("g")
.attr("class", "y axis")
.call(yAxis);
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("Value vs Date Graph");
svg.append("g")
.attr("class", "grid")
.attr("transform", "translate(0," + height + ")")
.call(make_x_axis()
.tickSize(-height, 0, 0)
.tickFormat(""))
svg.append("g")
.attr("class", "grid")
.call(make_y_axis()
.tickSize(-width, 0, 0)
.tickFormat(""))
});
</script>
</body>
data.csv
date,close
1-May-12,58.13
30-Apr-12,53.98
27-Apr-12,67.00
26-Apr-12,89.70
25-Apr-12,99.00
24-Apr-12,130.28
23-Apr-12,166.70
20-Apr-12,234.98
19-Apr-12,345.44
18-Apr-12,443.34
17-Apr-12,543.70
16-Apr-12,580.13
13-Apr-12,605.23
12-Apr-12,622.77
11-Apr-12,626.20
10-Apr-12,628.44
9-Apr-12,636.23
5-Apr-12,633.68
4-Apr-12,624.31
3-Apr-12,629.32
2-Apr-12,618.63
30-Mar-12,599.55
29-Mar-12,609.86
28-Mar-12,617.62
27-Mar-12,614.48
26-Mar-12,606.98

Could be the problem is caused in the first line of code, where var is shown as Var. See if that helps
Var margin = {
top: 30,
right: 20,
bottom: 30,
left: 50
},

You're missing a space in your CSS:
.grid.tick {
stroke: lightgrey;
opacity: 0.7;
}
should be
.grid .tick {
stroke: lightgrey;
opacity: 0.7;
}
or if you want to be more precise
g.grid g.tick line {
stroke: lightgrey;
opacity: 0.7;
}
The axis function creates <g> elements with a class "tick". You're drawing these inside a <g> element with class "grid". However, without the space the CSS selector .grid.tick only applies when both classes are on the same element.

Related

Is there a way to parse times and be able to plot them directly using javascript and d3?

How can I make a scatterplot plotting time of day against date, which looks like this in using javascript and d3? The problem I am having is formatting the time of day data and axis. Input of the date is in the y column format below.
Sample data:
Day Time
5-Feb-16 21:35:00
5-Feb-16 19:15:00
11-Dec-15 21:42:00
21-Jul-15 11:00:00
Code below inspired by:
http://bl.ocks.org/d3noob/38744a17f9c0141bcd04
What I have so far:
<!DOCTYPE html>
<meta charset="utf-8">
<style> /* set the CSS */
body { font: 12px Arial;}
path {
stroke: steelblue;
stroke-width: 2;
fill: none;
}
.axis path,
.axis line {
fill: none;
stroke: grey;
stroke-width: 1;
shape-rendering: crispEdges;
}
</style>
<body>
<!-- load the d3.js library -->
<script src="http://d3js.org/d3.v3.min.js"></script>
<script>
// Set the dimensions of the canvas / graph
var margin = {top: 30, right: 20, bottom: 30, left: 50},
width = 600 - margin.left - margin.right,
height = 270 - margin.top - margin.bottom;
// Parse the date / time
var parseDate = d3.time.format("%d-%b-%y").parse;
// Set the ranges
var x = d3.time.scale().range([0, width]);
var y = d3.scale.linear().range([height, 0]);
// Define the axes
var xAxis = d3.svg.axis().scale(x)
.orient("bottom").ticks(5);
var yAxis = d3.svg.axis().scale(y)
.orient("left").ticks(5);
// Define the line
var valueline = d3.svg.line()
.x(function(d) { return x(d.Day); })
.y(function(d) { return y(d.Time); });
// Adds the svg canvas
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 + ")");
// Get the data
d3.csv("data.csv", function(error, data) {
data.forEach(function(d) {
console.log(d.Time);
d.Day = parseDate(d.Day);
d.Time = +d.Time;
});
// Scale the range of the data
x.domain(d3.extent(data, function(d) { return d.Day; }));
y.domain([0, d3.max(data, function(d) { return d.Time; })]);
// Add the valueline path.
svg.append("path")
.attr("class", "line")
.attr("d", valueline(data));
// Add the scatterplot
svg.selectAll("dot")
.data(data)
.enter().append("circle")
.attr("r", 3.5)
.attr("cx", function(d) { return x(d.Day); })
.attr("cy", function(d) { return y(d.Time); });
// 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);
});
</script>
</body>
My output:
Is there a way to parse times and be able to plot them directly using javascript and d3? Or do I need to convert them to decimal numbers like 12:30 = 12.5 to plot them?
If you're using time in the y scale, you should parse the Time column as well:
var parseDate = d3.time.format("%d-%b-%y").parse;
var parseTime = d3.time.format("%H:%M:%S").parse;
Here is your code with just 4 points (the ones of the CSV you copy/pasted in your question):
var margin = {
top: 30,
right: 20,
bottom: 30,
left: 80
},
width = 600 - margin.left - margin.right,
height = 270 - margin.top - margin.bottom;
// Parse the date / time
var parseDate = d3.time.format("%d-%b-%y").parse;
var parseTime = d3.time.format("%H:%M:%S").parse;
// Set the ranges
var x = d3.time.scale().range([0, width]);
var y = d3.time.scale().range([height, 0]);
// Define the axes
var xAxis = d3.svg.axis().scale(x)
.orient("bottom").ticks(5);
var yAxis = d3.svg.axis().scale(y)
.orient("left");
// Define the line
var valueline = d3.svg.line()
.x(function(d) {
return x(d.Day);
})
.y(function(d) {
return y(d.Time);
});
// Adds the svg canvas
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 + ")");
// Get the data
var data = d3.csv.parse(d3.select("#csv").text());
data.forEach(function(d) {
d.Day = parseDate(d.Day);
d.Time = parseTime(d.Time);
});
// Scale the range of the data
x.domain(d3.extent(data, function(d) {
return d.Day;
}));
y.domain([parseTime("00:00:01"), parseTime("23:59:59")]);
// Add the valueline path.
svg.append("path")
.attr("class", "line")
.attr("d", valueline(data));
// Add the scatterplot
svg.selectAll("dot")
.data(data)
.enter().append("circle")
.attr("r", 3.5)
.attr("cx", function(d) {
return x(d.Day);
})
.attr("cy", function(d) {
return y(d.Time);
});
// 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);
pre {
display: none;
}
path {
stroke: steelblue;
stroke-width: 2;
fill: none;
}
.axis path,
.axis line {
fill: none;
stroke: grey;
stroke-width: 1;
shape-rendering: crispEdges;
}
<script src="//d3js.org/d3.v3.min.js"></script>
<pre id="csv">Day,Time
5-Feb-16,21:35:00
1-Feb-16,19:15:00
11-Dec-15,21:42:00
21-Jul-15,11:00:00</pre>

Function is not correctly plotted + cosmetic questions d3js

I have two questions. I am trying to plot a function with d3.js. I have already come far, but I have two problems.
My code currently; https://jsfiddle.net/v0du66ey/
<!DOCTYPE html>
<meta charset="utf-8">
<style>
body {
font: 10px sans-serif;
}
.axis path,
.axis line {
fill: none;
stroke: #000;
shape-rendering: crispEdges;
}
.line {
fill: none;
stroke: steelblue;
stroke-width: 1.5px;
}
.grid .tick {
stroke: lightgrey;
opacity: 0.7;
}
.grid path {
stroke-width: 0;
}
</style>
<body>
<script src="http://d3js.org/d3.v3.min.js"></script>
<script>
var margin = {top: 20, right: 20, bottom: 50, left: 50},
width = 960 - margin.left - margin.right,
height = 500 - margin.top - margin.bottom,
padding = 50;
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 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 data = [];
for (var k = 0; k < 100; k++) {
data.push({x: k, y: k});
}
var line = d3.svg.line()
.x(function(d) { return d.x; })
.y(function(d) { return d.y; })
.interpolate("linear");
// Define x domain
x.domain([-10, 10]);
// Define y domain
y.domain([-10, 10]);
// Add x axis
svg.append("g")
.attr("class","x axis")
.attr("transform","translate(0," + height + ")")
.call(xAxis)
// Add y axis
svg.append("g")
.attr("class","y axis")
.call(yAxis);
// Add x grid
svg.append("g")
.attr("class","grid")
.attr("transform","translate(0," + height + ")")
.call(xAxis
.tickSize(-height,-height,0)
.tickFormat("")
);
// Add y grid
svg.append("g")
.attr("class","grid")
.call(yAxis
.tickSize(-width,-width,0)
.tickFormat("")
);
// Add x axis label
svg.append("text")
.attr("transform", "translate(" + (width / 2) + "," + (height + margin.bottom) + ")")
.style("font-size","15")
.style("text-anchor", "middle")
.text("x axis");
// Add y axis label
svg.append("text")
.attr("transform", "rotate(-90)")
.attr("y",0 - margin.left)
.attr("x",0 - (height / 2))
.attr("dy", "1em")
.style("font-size","15")
.style("text-anchor", "middle")
.text("y axis");
svg.append("path")
.attr("class", "line")
.attr("d",line(data));
</script>
As you can see the function which I have defined, y = x. Is not correctly plotted along its entire domain. It goes for x from -10 to approx 2.5 and y from 10 to approx 7.5. What goes wrong here? I do not namely see it.
Furthermore I have a cosmetic question. I am trying to create a border around the whole plot on the axis and trying to get the ticks bars to point to the inside of the graph instead of outside. In other words, I want to have it more looking like, a Matlab plot,
About cosmetic question: you need to set innerTickSize(), outerTickSize() and tickPadding() on your axises with a negative numbers.
About main question:
as far as you have scales you should set line's x and y data as a result of scale functions.
so your line code will look like this:
var line = d3.svg.line()
.x(function(d) { return x(d.x); })
.y(function(d) { return y(d.y); })
.interpolate("linear");
Here is jsfiddle with updated sample http://jsfiddle.net/n3Lndkum/

Filtering out weekend days from time series line chart in D3.js

I have multi-year, daily dataset that looks like this:
date close
2013-09-17 178
2013-09-16 185
2013-09-15 20
2013-09-14 10
2013-09-13 190
2013-09-12 157
2013-09-11 150
2013-09-10 189
2013-09-09 183
2013-09-08 11
2013-09-07 20
I generated a line chart using this example, but would like filter out weekend days:
<!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("%Y-%m-%d").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 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, data) {
data.forEach(function(d) {
d.date = parseDate(d.date);
d.close = +d.close;
});
x.domain(d3.extent(data, function(d) { return d.date; }));
y.domain(d3.extent(data, function(d) { return d.close; }));
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>
This example from Crossfilter.js seems to achieve weekend filtering—but only for a small portion of the dataset. Ideally, I would be able to filter by day using checkboxes (e.g. weekdays or Mondays only) across the entire dataset.

Setting X-axis label in d3.js

In my d3.js bar chart i want the X-axis labels to be in "vertical". I'm getting the labels in "Horizontal" but the problem is some of the labels getting merged.
<!DOCTYPE html>
<style>
body {
font: 10px sans-serif;
}
.axis path,
.axis line {
fill: none;
stroke: #000;
shape-rendering: crispEdges;
}
.bar {
fill: red;
}
.x.axis path {
display: none;
}
</style>
<body>
<script src="http://d3js.org/d3.v3.min.js"></script>
<script>
var margin = {top: 20, right: 20, 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 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("ClassRoom.csv",type,function(error,data){
x.domain(data.map(function(d) { return d.Name; }));
y.domain([0, d3.max(data, function(d) { return d.Marks; })]);
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("Marks");
svg.selectAll(".bar")
.data(data)
.enter().append("rect")
.attr("class", "bar")
.attr("x", function(d) { return x(d.Name); })
.attr("width", x.rangeBand())
.attr("y", function(d) { return y(d.Marks); })
.attr("height", function(d) { return height - y(d.Marks)});
});
function type(d) {
d.Marks = +d.Marks;
return d;
}
</script>
My CSV file is
Name,Marks
Sathesh,15
Somnath,45
Naresh,35
Venkat,25
Prabha,78
Dinesh,36
You will have to do that with the SVG-Text Labels. Assuming you create the X-Axis in this fashion:
var xAxis = svg.append("g")
.attr({
"class": "x axis",
transform: "translate(0," + h + ")"
})
.call(xAxis);
You select the Text, and apply a transformation:
xAxis.selectAll("text")
.attr({
transform: function (d) {
return "rotate(-60, 0, 0)";
}
});
You will have to adjust the 0,0 in the rotate transformation to suit your needs. Also i recommend looking into the text-anchor attribute. But this should get you started!

d3.js line graph axis not displaying data correctly

I can't figure out why the data won't display correctly. I think it has something to do with the scale of the axis but I can't find any solutions. There is a line being drawn but it's to small to see. The example I was using had a time scale of several years where as I am only doing one week.
Below is the 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>
</head>
<body>
<script src="http://d3js.org/d3.v3.js" charset="utf-8"></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("%d-%b-%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.close); });
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 data = [{"close":71,"date":"9-Apr-13"},{"close":14,"date":"9-Apr-13"},{"close":10,"date":"9-Apr-13"},{"close":109,"date":"9-Apr-13"},{"close":62,"date":"9-Apr-13"},{"close":61,"date":"9-Apr-13"},{"close":62,"date":"9-Apr-13"},{"close":32,"date":"9-Apr-13"},{"close":19,"date":"9-Apr-13"}];
data.forEach(function(d) {
d.date = parseDate(d.date);
d.close = +d.close;
});
x.domain(d3.extent(data, function(d) { return d.date; }));
y.domain(d3.extent(data, function(d) { return d.close; }));
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>
</body>
</html>
Based on the data you've provided, there is only one instance of time: Apr 9, 2013. Since there is no difference between min and max, the x axis won't display.
If you change one date to Apr 11, It looks right.
Bear in mind that your css says
.x.axis path {
display: none;
}
so the actual line for the x axis won't display no matter what

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