Angular 4: Bar Chart with D3.js not fetching the subscribed data - javascript

I'm developing a Bar Chart with D3.js and I'm using Observable to fetch the value from API.
ngOnInit() {
this.dataCollectionService
.getAllCurrencyData()
.subscribe(
(currData) => {
this.currencyData = currData;
});
this.initSvg();
this.initAxis();
this.drawAxis();
this.drawBars();
}
private initSvg() {
this.svg = d3.select("svg");
this.width = +this.svg.attr("width") - this.margin.left - this.margin.right;
this.height = +this.svg.attr("height") - this.margin.top - this.margin.bottom;
this.g = this.svg.append("g")
.attr("transform", "translate(" + this.margin.left + "," + this.margin.top + ")");
}
private initAxis() {
this.x = d3Scale.scaleBand().rangeRound([0, this.width]).padding(0.1);
this.y = d3Scale.scaleLinear().rangeRound([this.height, 0]);
this.x.domain(this.currencyData.map((d) => d.symbol));
this.y.domain([0, d3Array.max(this.currencyData, (d) => d.price_usd)]);
}
private drawAxis() {
this.g.append("g")
.attr("class", "axis axis--x")
.attr("transform", "translate(0," + this.height + ")")
.call(d3Axis.axisBottom(this.x));
this.g.append("g")
.attr("class", "axis axis--y")
.call(d3Axis.axisLeft(this.y).ticks(5))
.append("text")
.attr("class", "axis-title")
.attr("transform", "rotate(-90)")
.attr("y", 6)
.attr("dy", "0.71em")
.attr("text-anchor", "end")
.text("Dollar Value");
}
private drawBars() {
this.g.selectAll(".bar")
.data(this.currencyData)
.enter().append("rect")
.attr("class", "bar")
.attr("x", (d) => this.x(d.symbol) )
.attr("y", (d) => this.y(d.price_usd) )
.attr("width", this.x.bandwidth())
.attr("height", (d) => this.height - this.y(d.price_usd) );
}
Problem I'm facing is, all the chart methods are getting executed before this.currencyData subscribes to all the values. Hence no chat is getting displayed I put all chart methods inside subscribe but it dint help. I also tried with putting the service call inside constructor but no luck.
Any solution for this issue please?

Related

d3 bar chart from multiple arrays

I'm making a barchart, but I cannot resolve its secondary function; updating with secondary data.
I make the bars with primary data from 2 separate arrays into an array like this;
labes = [label1, label2];
primarydata = [1,2]
data = [];
data = $.map(labels, function(v, i) {
return [[" " + v, " " + primaryData[i]]];
});
which gives output:
[["label1", "1"], ["label2", "2"]]
I then insert the data into an d3 bar chart.
var svg = d3.select($(svgobject).get(0)),
margin = {top: 20, right: 20, bottom: 30, left: 40},
width = $(svgobject).width() - margin.left - margin.right,
height = +svg.attr("height") - margin.top - margin.bottom;
var x = d3.scaleBand().rangeRound([0, width]).padding(0.1),
y = d3.scaleLinear().rangeRound([height, 0]),
y1 = d3.scaleLinear().rangeRound([height, 0]);
var g = svg.append("g")
.attr("transform", "translate(" + margin.left + "," + margin.top + ")");
x.domain(data.map(function (d) {
return d[0];
}));
y.domain([0, d3.max(data, function (d) {
// parseInt needed here, or the scaling is wrong. Still scales though for some reason
return parseInt(d[1]);
})]);
// Inserts the x-axis line text
g.append("g")
.attr("class", "axis axis--x")
.attr("transform", "translate(0," + (height) + ")")
.call(d3.axisBottom(x))
.selectAll("text")
.attr("y", 0)
.attr("x", 8)
.attr("dy", "1.75em")
.attr("transform", "rotate(340)")
.style("text-anchor", "end");
// Inserts the y-axis line
// d3.format(".2s"), formats the line fx from 1300 to 1.3 thousand
g.append("g")
.attr("class", "axis axis--y")
.call(d3.axisLeft(y).ticks(10).tickFormat(d3.format("2.2s")))
.append("text")
.attr("transform", "rotate(-90)")
.attr("y", 0 - margin.left)
.attr("x", 0 - (height / 2))
.attr("dy", "0.71em")
.attr("text-anchor", "end");
// Insert all the bars
g.selectAll(".bar")
.data(data)
.enter().append("rect")
.attr("class", "bar")
.attr("x", function (d) {
return x(d[0]);
})
.attr("y", function (d) {
return y(d[1]);
})
.attr("width", x.bandwidth())
.attr("height", function (d) {
return height - y(d[1]);
});
and this produces the barchart
However I want to with a push of a button put in comparable data like this;
secondaryData = [];
data = primaryData.concat(secondaryData).map(function(a, i) {
return [labels[i % 2], a.toString()];
});
And then I am at a loss as how to proceed. My bar does not even show the full data from the array with primary and secondary data. How do I insert the secondaryData but differentiate it? So I can style it differently.
I have also tried making a y1 taking data from d[2], but have failed in doing so.

bar chart transition, strange behavior d3.js

I am curious if someone can point out what I am doing wrong here? I was hoping my code would generate a smooth transition on click events, instead, first click only shifts the x-axis labels (why? how do i fix that?), then second/third do the sorting. Is there a way to prevent that from happening? I want to sort on first click and sure it would be nice if my labels didn't jump around. What am I missing here?
http://jsbin.com/cohaziqugo/edit?js,output
var data = [{"name":"A","value":0.08167},{"name":"B","value":0.01492},{"name":"C","value":0.0278},{"name":"D","value":0.04253},{"name":"E","value":0.12702},{"name":"F","value":0.02288},{"name":"G","value":0.02022},{"name":"H","value":0.06094},{"name":"I","value":0.06973},{"name":"J","value":0.00153},{"name":"K","value":0.00747},{"name":"L","value":0.04025},{"name":"M","value":0.02517},{"name":"N","value":0.06749},{"name":"O","value":0.07507},{"name":"P","value":0.01929},{"name":"Q","value":0.00098},{"name":"R","value":0.05987},{"name":"S","value":0.06333},{"name":"T","value":0.09056},{"name":"U","value":0.02758},{"name":"V","value":0.01037},{"name":"W","value":0.02465},{"name":"X","value":0.0015},{"name":"Y","value":0.01971},{"name":"Z","value":0.00074}];
var tickValues = data.map(function (d){return d.name;});
var step = Math.floor(tickValues.length / 24);
var indexes = d3.range(0,tickValues.length, step);
if (indexes.indexOf(tickValues.length - 1) == -1){
indexes.push(tickValues.length - 1);
}
var tickArray = d3.permute(tickValues, indexes);
var margin = { top: 40, right: 20, bottom: 30, left: 40 },
width = 1500 - margin.left - margin.right,
height = 600 - margin.top - margin.bottom;
var x = d3.scale.ordinal()
.domain(data.map(function (d) { return d.name; }))
.rangeBands([0, width], 0.1, 0.35);
var y = d3.scale.linear()
.range([height, 0]);
var xAxis = d3.svg.axis()
.scale(x)
.orient("bottom")
.tickValues(tickArray);
var yAxis = d3.svg.axis()
.scale(y)
.orient("left");
var barChart = d3.select("#barbarchart1").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 + ")");
y.domain([0, 0.2]);
barChart.append("g")
.attr("class", "x axis")
.attr("transform", "translate(0," + height + ")")
.call(xAxis)
.selectAll("text")
.style("text-anchor", "end")
.attr("dx", "-0.8em")
.attr("dy", "0.15em")
.attr("transform", function(d){
return "rotate(-65)"
});
barChart.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("Test");
barChart.selectAll("#bar")
.data(data)
.enter().append("rect")
.attr("id", "bar")
.attr("x", function (d) { return x(d.name); })
.attr("width", x.rangeBand())
.attr("y", function (d) { return y(d.value); })
.attr("fill", "grey")
.attr("height", function (d) { return height - y(d.value); })
.on("click", function() {sortBars();})
.on("mouseover", function(d){
var xPos = parseFloat(d3.select(this).attr("x"));
var yPos = parseFloat(d3.select(this).attr("y"));
var height = parseFloat(d3.select(this).attr("height"));
var width = parseFloat(d3.select(this).attr("width"));
d3.select(this).attr("fill", "red");
barChart.append("text")
.attr("x",xPos)
.attr("y", yPos - 3)
.attr("font-family", "sans-serif")
.attr("font-size", "10px")
.attr("font-weight", "bold")
.attr("fill", "black")
.attr("text-anchor", "middle")
.attr("id", "tooltip")
.attr("transform", "translate(" + width/2 + ")")
.text(d.name +": "+ d.value);
})
.on("mouseout", function(){
barChart.selectAll("#tooltip").remove();
d3.select(this).attr("fill", "grey");
});
var sortOrder = true;
var sortBars = function() {
//Flip value of sortOrder
sortOrder = !sortOrder;
var x0 = x.domain(data.sort(sortOrder
? function(a, b) { return b.value - a.value; }
: function(a, b) { return d3.ascending(a.name, b.name); })
.map(function(d) { return d.name; }))
.copy();
barChart.selectAll("#bar")
.sort(function(a, b) { return x0(a.name) - x0(b.name); });
var transition = barChart.transition().duration(750),
delay = function(d, i) { return i * 50; };
transition.selectAll("#bar")
.delay(delay)
.attr("x", function(d) { return x0(d.name); });
transition.select(".x.axis")
.call(xAxis)
.selectAll("text")
.selectAll("g")
.delay(delay)
;};
function type(d) {
d.value = +d.value;
return d;
}

My solution: http://jsbin.com/cequrabuqi/edit?js,output
first click only shifts the x-axis labels
data's default sort is ascending. On first click, you flip sortOrder from true to false, causing your ternary condition to choose
function(a, b) { return d3.ascending(a.name, b.name); }) as the sort order, which is still ascending. While the code is correct, it looks broken because the sort order never changes on the first click, thus nothing happens to the bars on screen.
would be nice if my labels didn't jump around.
I don't fully understand D3, but what seems to happen is when you call transition.select(".x.axis").call(xAxis), it removes any styles you have applied. So in my solution, i reapplied the styles each time the sort function is called.

d3 axis cut-off Horizontal bar chart

When I run my code the x and y-axis labels get cut off, and the bar chart ends prematurely. Any ideas how to rectify this. I imagine it has something to do with getting the range of the data to draw the SVG.I attached a copy of the image so you can see
var format = d3.format(",.0f");
var x = d3.scale.linear().range([0, w]),
y = d3.scale.ordinal().rangeRoundBands([0, h], .1);
var xAxis = d3.svg.axis().scale(x).orient("top").tickSize(-h),
yAxis = d3.svg.axis().scale(y).orient("left").tickSize(0);
var svg = d3.select("body").append("svg")
.attr("width", w + m[1] + m[3])
.attr("height", h + m[0] + m[2])
.append("g")
.attr("transform", "translate(" + m[3] + "," + m[0] + ")");
d3.csv("t.csv", function(data) {
// Parse numbers, and sort by value.
data.forEach(function(d) { d.value = +d.count; });
data.sort(function(a, b) { return b.value - a.count; });
// Set the scale domain.
x.domain([0, d3.max(data, function(d) { return d.count; })]);
y.domain(data.map(function(d) { return d.primary_type; }));
var bar = svg.selectAll("g.bar")
.data(data)
.enter().append("g")
.attr("class", "bar")
.attr("transform", function(d) { return "translate(0," + y(d.primary_type) + ")"; });
bar.append("rect")
.attr("width", function(d) { return x(d.value); })
.attr("height", y.rangeBand());
bar.append("text")
.attr("class", "value")
.attr("x", function(d) { return x(d.value); })
.attr("y", y.rangeBand() / 2)
.attr("dx", -3)
.attr("dy", ".35em")
.attr("text-anchor", "end")
.text(function(d) { return format(d.value); });
svg.append("g")
.attr("class", "x axis")
.call(xAxis);
svg.append("g")
.attr("class", "y axis")
.call(yAxis);
});
</script>
</body>
</html>

D3.js with update button adds new data to old instead of replacing old data

I've got an update button working that loads new .csv data into a D3.s stacked bar chart. My problem is that on update it seems to be using both data sets instead of just the new one. I think this is related to some confusion I have about update and selectAll, but I haven't been able to figure out how to replace instead of append. Here's my current code:
<!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>
<!-- <label><input type="checkbox"> Sort values</label> -->
<div id="option">
<input name="updateButton"
type="button"
value="Update"
onclick="updateData()" />
</div>
<script src="http://d3js.org/d3.v3.min.js"></script>
<script>
var margin = {top: 20, right: 20, bottom: 200, left: 40},
width = 960 - margin.left - margin.right,
height = 650 - margin.top - margin.bottom;
var x = d3.scale.ordinal()
.rangeRoundBands([0, width], .1);
var y = d3.scale.linear()
.rangeRound([height, 0]);
var color = d3.scale.ordinal()
.range(["#98abc5", "#8a89a6", "#7b6888", "#6b486b", "#a05d56", "#d0743c", "#ff8c00"]);
var xAxis = d3.svg.axis()
.scale(x)
.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("FinalData4.csv", function(error, data) {
color.domain(d3.keys(data[0]).filter(function(key) { return key !== "State"; }));
data.forEach(function(d) {
var y0 = 0;
d.ages = color.domain().map(function(name) { return {name: name, y0: y0, y1: y0 += +d[name]}; });
d.total = d.ages[d.ages.length - 1].y1;
});
//data.sort(function(a, b) { return b.total - a.total; });
x.domain(data.map(function(d) { return d.State; }));
y.domain([0, d3.max(data, function(d) { return d.total; })]);
// x-axis label
svg.append("g")
.attr("class", "x axis")
.attr("transform", "translate(0," + height + ")")
.call(xAxis)
.selectAll("text")
.style("text-anchor", "end")
.attr("dx", "-.8em")
.attr("dy", ".15em")
.attr("transform", function(d) {
return "rotate(-65)"
});
// y-axis label
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("USD in Millions");
// adds bars
var state = svg.selectAll(".state")
.data(data)
.enter().append("g")
.attr("class", "g")
.attr("transform", function(d) { return "translate(" + x(d.State) + ",0)"; });
state.selectAll("rect")
.data(function(d) { return d.ages; })
.enter().append("rect")
.attr("width", x.rangeBand())
.attr("y", function(d) { return y(d.y1); })
.attr("height", function(d) { return y(d.y0) - y(d.y1); })
.style("fill", function(d) { return color(d.name); });
// set up the legend
var legend = svg.selectAll(".legend")
.data(color.domain().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 data section (Called from the onclick)
function updateData() {
// Get the data again
d3.csv("FinalData2015.csv", function(error, data2) {
color.domain(d3.keys(data2[0]).filter(function(key) { return key !== "State"; }));
data2.forEach(function(d) {
var y0 = 0;
d.ages = color.domain().map(function(name) { return {name: name, y0: y0, y1: y0 += +d[name]}; });
d.total = d.ages[d.ages.length - 1].y1;
});
x.domain(data2.map(function(d) { return d.State; }));
y.domain([0, d3.max(data2, function(d) { return d.total; })]);
var tran = d3.select("body").transition();
// change x-axis label
tran.select(".x.axis")
.duration(1000)
.call(xAxis)
.selectAll("text")
.style("text-anchor", "end")
.attr("dx", "-.8em")
.attr("dy", ".15em")
.attr("transform", function(d) {
return "rotate(-65)"
});
// change the y-axis label
tran.select(".y.axis")
.duration(1000)
.call(yAxis);
// adds bars
var state = svg.selectAll(".State")
.data(data2)
.enter().append("g")
//.transition()
//.duration(1000)
.attr("class", "g")
.attr("transform", function(d) { return "translate(" + x(d.State) + ",0)"; });
var test = state.selectAll("rect")
.data(function(d) { return d.ages; })
.enter().append("rect")
.transition()
.duration(1000)
.attr("width", x.rangeBand())
.attr("y", function(d) { return y(d.y1); })
.attr("height", function(d) { return y(d.y0) - y(d.y1); })
.style("fill", function(d) { return color(d.name); });
});
}
</script>
</body>
UPDATE: I changed the functionUpdateData() code to what I have currently because I realized it had some junk in there. New code has working transitions for x and y axis labels, but still the same problem described above with the actual bars.

It is because you are not using update and exiting joins in the update function (read this article carefully http://bost.ocks.org/mike/join/). As far I understand, you want to update the existing csv data with the new one, for that you need to update the current set of data. I'll give you an example with a simpler code:
function updateData() {
//this is the new data that you are binding to some circles on the canvas
var circle = svg.selectAll("circle").data([200, 100, 50,10,5]);
//if there is new data, you get those new circles with the enter() method
var circleEnter = circle.enter().append("circle");
circleEnter.attr("cy", 60);
circleEnter.attr("cx", function(d, i) { return i * 100 + 30; });
circleEnter.attr("r", function(d) { return Math.sqrt(d); });
//------THIS IS THE PART YOU ARE MISSING------
//but the circles that already exist need an update. (check there is no enter() method here)
circle.attr("r", function(d) { return Math.sqrt(d); });
//also you need to remove the circles that don´t have a data binding.
circle.exit().remove();
}
so I think that in your code you have to write something like:
var state = svg.selectAll(".state").data(data);
//the update data
state.attr("transform", function(d) { return "translate(" + x(d.State) + ",0)"; });

d3js - Sortable Group Bar Chart

Full disclosure: I'm not new to programming, but I'm pretty new to d3 and javascript.
I am trying to combine the Grouped Bar Chart Example and the Sortable Bar Chart Example. I have a total of 51 groups of 3 variables. Here is a truncated form of my dataset you can use to run the code if you want:
State,Response,Predicted,Difference
1,0.0526,0.0983,0.0456
2,0.1161,0.1093,0.0068
5,0.0967,0.1035,0.0067
4,0.0998,0.0942,0.0055
6,0.0888,0.0957,0.0069
I want to be able to order the data by the Response variable by checking a box. Right now I can get the x-axis labels to move accordingly, but I can't get the bars to move with them. To get to this point I renamed the variables in the change() function according to my data. I tried saving the transition.selectAll(".state") function as state2 and then using state2.selectAll(".rect") to modify the x-coordinates of the rectangles, but I realized that wasn't going to get me anywhere.
Here is my code right now (mostly copied from the examples linked above). The relevant function is at the end.
var margin = {top: 20, right: 20, bottom: 30, left: 40},
width = 1000 - margin.left - margin.right,
height = 500 - margin.top - margin.bottom,
code = "";
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.category10();
var xAxis = d3.svg.axis()
.scale(x0)
.orient("bottom");
var yAxis = d3.svg.axis()
.scale(y)
.orient("left")
.tickFormat(d3.format(".0%"));
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) {
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("Prevalence");
var state = svg.selectAll(".state")
.data(data)
.enter().append("g")
.attr("class", "g")
.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); });
d3.select("input").on("change", change);
var sortTimeout = setTimeout(function() {
d3.select("input").property("checked", true).each(change);
}, 2000);
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; });
function change() {
clearTimeout(sortTimeout);
// Copy-on-write since tweens are evaluated after a delay.
var x2 = x0.domain(data.sort(this.checked
? function(a, b) { return b.Response - a.Response; }
: function(a, b) { return d3.ascending(a.State, b.State); })
.map(function(d) { return d.State; }))
.copy();
var transition = svg.transition().duration(750),
delay = function(d, i) { return i * 50; };
var state2 = transition.selectAll(".state")
.delay(delay)
.attr("x", function(d) { return x2(d.State); });
transition.select(".x.axis")
.call(xAxis)
.selectAll("g")
.delay(delay);
}
})
Any help would be greatly appreciated. I've found nothing so far searching SO and Google.

I assume that you want to keep the grouping when sorting. Your groups are contained in g elements, so all you need to do is adjust the coordinates of the groups. That is, the code to move the groups would look something like
svg.selectAll("g.g")
.transition().duration(750)
.delay(delay)
.attr("transform", function(d) { return "translate(" + x2(d.State) + ",0)"; });

Am tried with the stacked bar chart. To sort the stacked chart, please find the
Stacked Bar Chart
function change() {
// Copy-on-write since tweens are evaluated after a delay.
var x0 = x.domain(data.sort(this.checked
? function(a, b) { return b.noncomplete - a.noncomplete; }
: function(a, b) { return d3.ascending(a.moduleName, b.moduleName); })
.map(function(d) { return d.moduleName; }))
.copy();
var transition = svg.transition().duration(750),
delay = function(d, i) { return i * 60; };
transition.selectAll(".moduleName")
.delay(delay)
.attr("transform",function(d, i) { return "translate(" + (x0(d.moduleName)) + ",0)"; } );
transition.select(".x.axis")
.call(xAxis)
.selectAll("g")
.delay(delay);
}

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