Scale d3 x axis(time) to zero - javascript

I am making a chart using d3 and time data.
However, its scale is wrong.
It is a simple example.
Code is below:
var svg = d3.select("svg"),
margin = {top: 20, right: 20, bottom: 30, left: 50},
width = svg.attr("width"),
height = +svg.attr("height") - margin.top - margin.bottom,
g = svg.append("g").attr("transform", "translate(" + margin.left + "," + margin.top + ")");
var parseTime = d3.timeParse("%H:%M:%S");
var x = d3.scaleTime().range([0, width]);
var y = d3.scaleLinear().range([height, 0]);
var line = d3.line()
.x(function(d) { return x(d.date); })
.y(function(d) { return y(d.close); });
d3.csv("data.csv", function(d) {
d.date = parseTime(d.date);
d.close = +parseFloat(d.close);
return d;
}, function(error, data) {
if (error) throw error;
x.domain(d3.extent(data, function(d) { return d.date; }));
y.domain(d3.extent(data, function(d) { return d.close; }));
g.append("g")
.attr("transform", "translate(0," + height + ")")
.call(d3.axisBottom(x))
.select(".domain");
g.append("g")
.call(d3.axisLeft(y))
.append("text")
.attr("fill", "#000")
.attr("transform", "rotate(-90)")
.attr("dy", "0.71em")
.attr("y",2)
.attr("text-anchor", "end");
g.append("path")
.datum(data)
.attr("fill", "none")
.attr("stroke", "steelblue")
.attr("stroke-linejoin", "round")
.attr("stroke-linecap", "round")
.attr("stroke-width", 1.5)
.attr("d", line);
});
Data is:
date,close
00:00:00,0.00
03:00:00,10
06:00:00,20
09:00:00,30
12:00:00,40
15:00:00,50
18:00:00,60
21:00:00,70
The point midnight,0 is wrong. It should be at 0,0.
Instead, it generates this:
How can it fit the chart correctly (starting at 0,0)?
Link to the Codepen:
https://codepen.io/jaqueline-passos/pen/mGpexG/

Related

Focus not displaying the graph properly D3 javascript

Here is the template for my Django where I am visualizing training using D3:
.line {
fill: none;
stroke: gray;
stroke-width: 2px;
}
<meta charset="utf-8">
<body>
<script src="https://d3js.org/d3.v4.min.js"></script>
<script>
var real = {{values.real0|safe}}, pred = {{values.got0|safe}};
var margin = {top: 20, right: 20, bottom: 110, left: 50},
margin2 = {top: 430, right: 20, bottom: 30, left: 40},
width = 960 - margin.left - margin.right,
height = 500 - margin.top - margin.bottom,
height2 = 500 - margin2.top - margin2.bottom;
var x = d3.scaleLinear().range([0, width]).domain([0, Object.keys(real).length]),
x2 = d3.scaleLinear().range([0, width]).domain([0, Object.keys(real).length]),
y = d3.scaleLinear().range([height, 0]).domain([0, 1]),
y2 = d3.scaleLinear().range([height2, 0]).domain([0, 1]);
var xAxis = d3.axisBottom(x),
xAxis2 = d3.axisBottom(x2),
yAxis = d3.axisLeft(y);
var brush = d3.brushX()
.extent([[0, 0], [width, height2]])
.on("brush", brushed);
var svg = d3.select("body").append("svg")
.attr("width", width + margin.left + margin.right)
.attr("height", height + margin.top + margin.bottom);
svg.append("defs").append("clipPath")
.attr("id", "clip")
.append("rect")
.attr("width", width)
.attr("height", height);
var formain = d3.line()
.x(function(d,i) { return x(i); })
.y(function(d) { return y(d); });
var forbrush = d3.line()
.x(function(d,i) { return x2(i); })
.y(function(d) { return y2(d); });
var focus = svg.append("g")
.attr("class", "focus")
.attr("transform", "translate(" + margin.left + "," + margin.top + ")");
var context = svg.append("g")
.attr("class", "context")
.attr("transform", "translate(" + margin2.left + "," + margin2.top + ")");
// Real starts
var color = d3.scaleLinear()
.domain([0, 0.5, 1])
.range(["red", "dodgerblue", "lime"]);
// x.domain(d3.extent(data, function(d) { return d.date; }));
// y.domain([0, d3.max(data, function(d) { return d.price; })+200]);
// x2.domain(x.domain());
// y2.domain(y.domain());
// append scatter plot to main chart area
var dots = focus.append("g");
dots.attr("clip-path", "url(#clip)");
dots.selectAll("dot")
.data(real)
.enter().append("circle")
.attr('class', 'dot')
.attr("r",5)
.style("opacity", .5)
.attr("cx", function(d,i) { return x(i); })
.attr("cy", function(d) { return y(d); })
.attr("fill",(function (d) { return color(d) }));
focus.append("g")
.attr("class", "axis axis--x")
.attr("transform", "translate(0," + height + ")")
.call(xAxis);
focus.append("g")
.attr("class", "axis axis--y")
.call(yAxis);
focus.append("text")
.attr("transform", "rotate(-90)")
.attr("y", 0 - margin.left)
.attr("x",0 - (height / 2))
.attr("dy", "1em")
.style("text-anchor", "middle")
.text(Object.keys({{values|safe}}));
// console.log(Object.keys({{values|safe}}));
svg.append("text")
.attr("transform",
"translate(" + ((width + margin.right + margin.left)/2) + " ," +
(height + margin.top + margin.bottom) + ")")
.style("text-anchor", "middle")
.text("index");
// append scatter plot to brush chart area
var dots = context.append("g");
dots.attr("clip-path", "url(#clip)");
dots.selectAll("dot")
.data(real)
.enter().append("circle")
.attr('class', 'dotContext')
.attr("r",3)
.style("opacity", .5)
.attr("cx", function(d,i) { return x2(i); })
.attr("cy", function(d) { return y2(d); })
.attr("fill",(function (d) { return color(d) }));
context.append("g")
.attr("class", "axis axis--x")
.attr("transform", "translate(0," + height2 + ")")
.call(xAxis2);
context.append("g")
.attr("class", "brush")
.call(brush)
.call(brush.move, x.range());
focus.append("path")
.data([real])
.attr("class", "line")
.attr("d", formain);
context.append("path")
.data([real])
.attr("class", "line")
.attr("d", forbrush);
//create brush function redraw scatterplot with selection
function brushed() {
var selection = d3.event.selection;
x.domain(selection.map(x2.invert, x2));
focus.selectAll(".dot")
.attr("cx", function(d,i) { return x(i); })
.attr("cy", function(d) { return y(d); });
context.selectAll(".line")
.attr("cx", function(d,i) { return x(i); })
.attr("cy", function(d) { return y(d); });
focus.select(".axis--x").call(xAxis);
context.select(".axis--x").call(xAxis2);
}
</script>
The output I received is something like the following:
What I want is the the magnifier focus should display the respective contents of the line and the dots. Plus I want to have the line in the background and dots on the foreground.
Please help me modify the sample for my use. There is some attribute I guess I am missing.
The sample csv need is : Sample Csv
Try to change the few thing and it will work. see below:
var focus = svg.append("g")
.attr("class", "focus")
.attr("transform", "translate(" + margin.left + "," + margin.top + ")");
var context = svg.append("g")
.attr("class", "context")
.attr("transform", "translate(" + margin2.left + "," + margin2.top + ")");
focus.append("path")
.data([real])
.attr("class", "line")
.attr("d", formain);
context.append("path")
.data([real])
.attr("class", "line")
.attr("d", forbrush);
Place it just as mentioned.
Change the brushed() function like the following:
function brushed() {
var selection = d3.event.selection;
x.domain(selection.map(x2.invert, x2));
focus.selectAll(".dot")
.attr("cx", function(d,i) { return x(i); })
.attr("cy", function(d) { return y(d); });
focus.selectAll(".line")
.attr("d",formain)
}
See the output of mine. It worked.:
Hope this will help you.

How to move the chart to the right side with d3.js?

I'm using d3.js to create some charts. I added some gridlines in my charts and the result is here. So I guess, I have to move the grid to the right side to identify with the axis y.I want also to fix the values in x axis (they have to be only 10 values for each line : 13000, 13100, 13200, 13300, 13400, 13500, 13600, 13700, 13800, 13900, 14000) Here is the whole code:
<!DOCTYPE html>
<style> /* set the CSS */
.grid line {
stroke: aquamarine;
stroke-opacity: 0.7;
shape-rendering: crispEdges;
}
.grid path {
stroke-width: 1;
}
</style>
<style>
body {
background-color: #262f39;
}
</style>
<svg id="svg1" width="1000" height="500"></svg>
<script src="https://d3js.org/d3.v4.min.js"></script>
<script>
// set the dimensions and margins of the graph
var svg1 = d3.select("#svg1"),
margin = {top: 1, right: 0, bottom: 90, left: 50},
width = 950 - margin.left - margin.right,
height = 500 - margin.top - margin.bottom,
g1 = svg1.append("g").attr("transform", "translate(" + margin.left + "," + margin.top + ")");
var x = d3.scaleLinear()
.rangeRound([0, width]);
var y = d3.scaleLinear()
.rangeRound([height, 0]);
// gridlines in x axis function
function make_x_gridlines() {
return d3.axisBottom(x)
.ticks(5)
}
// gridlines in y axis function
function make_y_gridlines() {
return d3.axisLeft(y)
.ticks(5)
}
var line = d3.line()
.x(function(d) { return x(d.frequency); })
.y(function(d) { return y(d.output); });
d3.csv("Measurements.csv", function(d) {
d.frequency = +d.frequency;
d.output = +d.output;
return d;
}, function(error, data) {
if (error) throw error;
x.domain(d3.extent(data, function(d) { return d.frequency; }));
y.domain(d3.extent(data, function(d) { return d.output; }));
g1.append("g")
.attr("transform", "translate(0," + height + ")")
.call(d3.axisBottom(x))
.append("text")
.attr("fill", "#000")
.attr("y", 11)
.attr("dx", "0.71em")
.attr("text-anchor", "end")
.text("Frequency");
g1.append("g")
.call(d3.axisLeft(y))
.append("text")
.attr("fill", "#000")
.attr("transform", "rotate(-90)")
.attr("y", 15)
.attr("dy", "0.71em")
.attr("text-anchor", "end")
.text("Mixer Output");
g1.append("path")
.datum(data)
.attr("fill", "none")
.attr("stroke", "aquamarine")
.attr("stroke-linejoin", "round")
.attr("stroke-linecap", "round")
.attr("stroke-width", 4)
.attr("d", line);
// add the X gridlines
svg1.append("g")
.attr("class", "grid")
.attr("transform", "translate(0," + height + ")")
.call(make_x_gridlines()
.tickSize(-height)
.tickFormat("")
)
// add the Y gridlines
svg1.append("g")
.attr("class", "grid")
.call(make_y_gridlines()
.tickSize(-width)
.tickFormat("")
)
});
</script>
<svg id="svg2" width="1000" height="500"></svg>
<script>
// set the dimensions and margins of the graph
var svg2 = d3.select("#svg2"),
margin = {top: 1, right: 0, bottom: 90, left: 50},
width = 950 - margin.left - margin.right,
height = 500 - margin.top - margin.bottom,
g2 = svg2.append("g").attr("transform", "translate(" + margin.left + "," + margin.top + ")");
var x2 = d3.scaleLinear()
.rangeRound([0, width]);
var y2 = d3.scaleLinear()
.rangeRound([height, 0]);
// gridlines in x axis function
function make_x_gridlines() {
return d3.axisBottom(x2)
.ticks(10)
}
// gridlines in y axis function
function make_y_gridlines() {
return d3.axisLeft(y2)
.ticks(5)
}
var line = d3.line()
.x(function(d) { return x(d.frequency); })
.y(function(d) { return y(d.output); });
d3.csv("m11.csv", function(d) {
d.frequency = +d.frequency;
d.output = +d.output;
return d;
}, function(error, data) {
if (error) throw error;
x.domain(d3.extent(data, function(d) { return d.frequency; }));
y.domain(d3.extent(data, function(d) { return d.output; }));
g2.append("g")
.attr("transform", "translate(0," + height + ")")
.call(d3.axisBottom(x))
.append("text")
.attr("fill", "#000")
.attr("y", 11)
.attr("dx", "0.71em")
.attr("text-anchor", "end")
.text("Frequency");
g2.append("g")
.call(d3.axisLeft(y))
.append("text")
.attr("fill", "#000")
.attr("transform", "rotate(-90)")
.attr("y", 9)
.attr("dy", "0.71em")
.attr("text-anchor", "end")
.text("Delay");
g2.append("path")
.datum(data)
.attr("fill", "none")
.attr("stroke", "aquamarine")
.attr("stroke-linejoin", "round")
.attr("stroke-linecap", "round")
.attr("stroke-width", 4)
.attr("d", line);
// add the X gridlines
svg2.append("g")
.attr("class", "grid")
.attr("transform", "translate(0," + height + ")")
.call(make_x_gridlines()
.tickSize(-height)
.tickFormat("")
)
// add the Y gridlines
svg2.append("g")
.attr("class", "grid")
.call(make_y_gridlines()
.tickSize(-width)
.tickFormat("")
)
});
</script>
It seems that you used a g element to translate the graph and to add some margin, but you appended the grid directly to the svg.
Try to append the grid to the g element instead.

D3.Js- passing data set from C# to javascript does not work

This question is related to the following question that I posted some time ago.
D3.js - line graph is not displayed
I accepted one answer and based on that I did some modifications.
var data = $('#<%=hdnDtArray.ClientID%>').val();
var svg = d3.select("svg"),
margin = { top: 20, right: 20, bottom: 30, left: 50 },
width = +svg.attr("width") - margin.left - margin.right,
height = +svg.attr("height") - margin.top - margin.bottom,
g = svg.append("g").attr("transform", "translate(" + margin.left + ","
+ margin.top + ")");
var parseTime = d3.timeParse("%d-%b-%y");
var x = d3.scaleTime()
.rangeRound([0, width]);
var y = d3.scaleLinear()
.rangeRound([height, 0]);
var line = d3.line()
.x(function (d) { return x(parseTime(d.date)); })
.y(function (d) { return y(d.close); });
x.domain(d3.extent(data, function (d) { return parseTime(d.date); }));
y.domain(d3.extent(data, function (d) { return d.close; }));
g.append("g")
.attr("transform", "translate(0," + height + ")")
.call(d3.axisBottom(x))
.select(".domain")
.remove();
g.append("g")
.call(d3.axisLeft(y))
.append("text")
.attr("fill", "#000")
.attr("transform", "rotate(-90)")
.attr("y", 6)
.attr("dy", "0.71em")
.attr("text-anchor", "end")
.text("Price ($)");
g.append("path")
.datum(data)
.attr("fill", "none")
.attr("stroke", "steelblue")
.attr("stroke-linejoin", "round")
.attr("stroke-linecap", "round")
.attr("stroke-width", 1.5)
.attr("d", line);
Here, "hdnDtArray" is an hidden input field in asp.net through which I pass the data set to the JavaScript code.
I debugged and found that it looks like the following.
[{"date":"2016.07.19","close":185697.89},
{"date":"2016.07.20","close":185697.89},
{"date":"2016.07.21","close":186601.1},
{"date":"2016.07.22","close":187273.89},
{"date":"2016.07.25","close":186807.74},
{"date":"2016.07.26","close":186893.26},....]
Graph is not displayed and there is this error
Error: <path> attribute d: Expected number, "MNaN,NaNLNaN,NaNL…".
And, at the same time what I want Y axis to have is Years, months depending on the context. Like Jan, Feb, Mar etc.
or else, 2015,2016,2017 etc.
or else 2015-12-01,2015-12-02,2015-12-03 etc.
I should be able to pass these data through another array.
Can someone pls help ? I am a newbie to D3.js
The problem here is your specifier. Since your dates are...
"2016.07.19"
... your specifier should be:
var parseTime = d3.timeParse("%Y.%m.%d");
For a list of values for the specifier string, have a look at the API here.
Here is your code with that change only:
var data = [{
"date": "2016.07.19",
"close": 185697.89
}, {
"date": "2016.07.20",
"close": 185697.89
}, {
"date": "2016.07.21",
"close": 186601.1
}, {
"date": "2016.07.22",
"close": 187273.89
}, {
"date": "2016.07.25",
"close": 186807.74
}, {
"date": "2016.07.26",
"close": 186893.26
}]
var svg = d3.select("svg"),
margin = {
top: 20,
right: 20,
bottom: 30,
left: 50
},
width = +svg.attr("width") - margin.left - margin.right,
height = +svg.attr("height") - margin.top - margin.bottom,
g = svg.append("g").attr("transform", "translate(" + margin.left + "," + margin.top + ")");
var parseTime = d3.timeParse("%Y.%m.%d");
var x = d3.scaleTime()
.rangeRound([0, width]);
var y = d3.scaleLinear()
.rangeRound([height, 0]);
var line = d3.line()
.x(function(d) {
return x(parseTime(d.date));
})
.y(function(d) {
return y(d.close);
});
x.domain(d3.extent(data, function(d) {
return parseTime(d.date);
}));
y.domain(d3.extent(data, function(d) {
return d.close;
}));
g.append("g")
.attr("transform", "translate(0," + height + ")")
.call(d3.axisBottom(x))
.select(".domain")
.remove();
g.append("g")
.call(d3.axisLeft(y))
.append("text")
.attr("fill", "#000")
.attr("transform", "rotate(-90)")
.attr("y", 6)
.attr("dy", "0.71em")
.attr("text-anchor", "end")
.text("Price ($)");
g.append("path")
.datum(data)
.attr("fill", "none")
.attr("stroke", "steelblue")
.attr("stroke-linejoin", "round")
.attr("stroke-linecap", "round")
.attr("stroke-width", 1.5)
.attr("d", line);
<script src="https://d3js.org/d3.v4.min.js"></script>
<svg width="500" height="300"></svg>

d3 tsv not working with django

I know this question is asked multiple times, but my problem seems to be unique:
my django view:
def data(request):
event = Event.objects.get(pk=request.GET.get('epk'))
occurrences = event.occurrences.all()
response = HttpResponse(content_type='text/tsv')
response['Content-Disposition'] = 'filename="data.tsv"'
response.write('date\tclose\n')
for occ in occurrences:
response.write('%s\t%s\n' % (occ.timestamp.strftime('%Y-%m-%d %H:%M:%S'), occ.counter))
return response
and js:
<script src="https://d3js.org/d3.v4.min.js"></script>
<script>
var svg = d3.select("svg"),
margin = {top: 20, right: 20, bottom: 30, left: 50},
width = +svg.attr("width") - margin.left - margin.right,
height = +svg.attr("height") - margin.top - margin.bottom,
g = svg.append("g").attr("transform", "translate(" + margin.left + "," + margin.top + ")");
var parseTime = d3.timeParse("%Y-%m-%d %H:%M:%S");
var x = d3.scaleTime().rangeRound([0, width]);
var y = d3.scaleLinear().rangeRound([height, 0]);
var line = d3.line().x(function (d) {
return x(d.date);
}).y(function (d) {
return y(d.close);
});
d3.tsv("{% url 'data' %}?epk={{ event.id }}", function (d) {
d.date = parseTime(d.date);
d.close = +d.close;
return d;
}, function (error, data) {
console.log(data); // ----> the screenshot at the bottom
if (error) throw error;
x.domain(d3.extent(data, function (d) {
return d.date;
}));
y.domain(d3.extent(data, function (d) {
return d.close;
}));
g.append("g")
.attr("transform", "translate(0," + 1 + ")")
.call(d3.axisBottom(x)) // <---- error place
.select(".domain")
.remove();
g.append("g")
.call(d3.axisLeft(y))
.append("text")
.attr("fill", "#000")
.attr("transform", "rotate(-90)")
.attr("y", 6)
.attr("dy", "0.71em")
.attr("text-anchor", "end")
.text("Occurs");
g.append("path")
.datum(data)
.attr("fill", "none")
.attr("stroke", "steelblue")
.attr("stroke-linejoin", "round")
.attr("stroke-linecap", "round")
.attr("stroke-width", 1.5)
.attr("d", line);
});
</script>
content of tsv file I get from my django view is:
date close
2017-02-12 14:07:14 1
2017-02-12 14:07:35 1
2017-02-12 17:12:14 1
2017-02-12 17:23:40 1
2017-02-12 17:51:52 1
2017-02-13 04:15:58 1
the worst part is that it is working on plunker: http://plnkr.co/edit/Moyyawptt8lY0pLBDQDr?p=preview
but in my code, something is wrong. I just dont know where to debug, since the error message is so horribly unclear.
can someone please help me out? it would be the greatest help to humanity!
this is the screenshot from the console.log(data);

D3 Chart Range SafeZone

I currently have a simple D3 Chart looking like this.
And what i want simply is to have a range box inside the chart. Basically semi transparent.
Imagine if inside the grey box was semi - transparent.
Source:
<script>
var configuration = {"xtitle":"X"};
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()
.interpolate("basis")
.x(function(d) { return x(d.x); })
.y(function(d) { return y(d.y); });
var line2 = d3.svg.line()
.interpolate("basis")
.x(function(d) { return x(d.x); })
.y(function(d) { return y(d.y); });
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.json("data.json", function(error, data) {
if (error) throw error;
data.forEach(function(d) {
d.x = parseDate(d.x);
d.y = d.y;
});
x.domain([data[0].x, data[data.length - 1].x]);
y.domain(d3.extent(data, function(d) { return d.y; }));
var meanx = [{x:parseDate("20111001"),y:25},{x:parseDate("20111002"),y:60},{x:parseDate("20111003"),y:25}];
svg.append("linearGradient")
.attr("id", "temperature-gradient")
.attr("gradientUnits", "userSpaceOnUse")
.attr("x1", 0).attr("y1", y(50))
.attr("x2", 0).attr("y2", y(60))
.selectAll("stop")
.data([
{offset: "0%", color: "green"},
{offset: "50%", color: "gray"},
{offset: "100%", color: "red"}
])
.enter().append("stop")
.attr("offset", function(d) { return d.offset; })
.attr("stop-color", function(d) { return d.color; });
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(configuration.xtitle);
svg.append("path")
.datum(data)
.attr("class", "line")
.attr("d", line);
svg.append("path")
.datum(meanx)
.attr("class", "line")
.attr("d", line);
svg.append('path')
.attr('class', 'area upper outer')
.attr('d', upperOuterArea)
.attr('clip-path', 'url(#rect-clip)');
svg.append("path")
.attr("class","box")
.attr("x1",0).attr("y1",20)
.attr("x2",0).attr("y2",50);
});
</script>
At the very bottom of your script, append a rectangle:
svg.append("rect").attr("x", 0)
.attr("y", y(45))
.attr("width", width)
.attr("height", y(25) - y(45))
.attr("fill", "white")
.attr("opacity", 0.6);
This goes from 45 to 25 in your y axis. The rectangle is white, and its opacity changes the appearance of the lines behind it.

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