Stop bars from centering in chart - javascript

I am creating a bar chart using d3. To do so I looked at this code and changed it a little bit.
However what it does is centering the bars, and I would like the bars to start immediate at the bar y axis.
It looks like the issue comes from these 2 pieces of code:
var x = d3.scale.ordinal()
.rangeRoundBands([0, width], .0);
and the last line of this one:
svg.selectAll(".bar")
.data(graphObj)
.enter().append("rect")
.attr("class", "bar")
.attr("x", function(d) { return x(d.step); })
where the x(d.step) is responsible for the distance, the x is set at the var x = ...
Somehow I need to change this, but cant figure it out.
The distance is a bit different since I changed this:
var x = d3.scale.ordinal()
.rangeRoundBands([0, width], .1);
to this:
var x = d3.scale.ordinal()
.rangeRoundBands([0, width], .0);
but it doesn't help much.
Can you help out here?
This is my code:
$('#chartDiv').html('');
var margin = {top: 10, right: 10, bottom: 35, left: 50},
width = 600 - margin.left - margin.right,
height = 250 - margin.top - margin.bottom;
var x = d3.scale.ordinal()
.rangeRoundBands([0, width], .0);
var y = d3.scale.linear()
.range([height, 0]);
var xAxis = d3.svg.axis()
.scale(x)
.orient("bottom");
var yAxis = d3.svg.axis()
.scale(y)
.orient("left")
.ticks(10, "");
var svg = d3.select("#chartDiv").append("svg")
.attr("width", width + margin.left + margin.right)
.attr("height", height + margin.top + margin.bottom)
.append("g")
.attr("transform", "translate(" + margin.left + "," + margin.top + ")");
graphObj.forEach(function(d) {
d.step = +d.step;
d.temp = +d.temp;
});
x.domain(graphObj.map(function(d) { return d.step; }));
y.domain([0, d3.max(graphObj, function(d) { return d.temp; })]);
svg.append("g")
.attr("class", "x axis")
.attr("transform", "translate(0," + height + ")")
.call(xAxis);
svg.append("g")
.attr("class", "y axis")
.call(yAxis)
.append("text")
.attr("transform", "rotate(-90)")
.attr("y", 6)
.attr("dy", "-40px")
.style("text-anchor", "end")
.text("Temperature");
svg.selectAll(".bar")
.data(graphObj)
.enter().append("rect")
.attr("class", "bar")
.attr("x", function(d) { console.log(d.step, x.rangeBand(), x(d.step)); return x(d.step); })
.attr("width", x.rangeBand())
.attr("y", function(d) { return y(d.temp); })
.attr("height", function(d) { return height - y(d.temp); });
if ($('#chartDiv').css('left').replace('px','') < 0) {
$('#chartDiv').animate({
left: 10
}, 1000);
}

you need to add the i variable to the .attr("x", function(d) { return x(d.step); }), like so: .attr("x", function(d, i) { return x.rangeRoundBands() * i; }), so it will go through the bars and place them one after the other (this might need some tweaking, can't do it properly without a jsfiddle) but should at least get you on the path of fixing it without issues

Related

d3 - how to add x-axis labels for only years on a monthly chart?

I'm creating a bar chart in d3 (using r2d3 in R) that shows data per month. I'm wondering how I can format the x-axis so that while there is a bar for each month, the labels only show the year markers (i.e. under each january bar.)
Data look like this:
letter,frequency
1/1/2017,144
2/1/2017,85
3/1/2017,59
4/1/2017,73
5/1/2017,68
6/1/2017,91
7/1/2017,107
8/1/2017,94
9/1/2017,79
10/1/2017,84
11/1/2017,70
12/1/2017,86
1/1/2018,72
2/1/2018,71
3/1/2018,82
4/1/2018,50
5/1/2018,86
6/1/2018,75
7/1/2018,62
8/1/2018,72
9/1/2018,65
10/1/2018,75
11/1/2018,63
12/1/2018,87
1/1/2019,59
2/1/2019,60
3/1/2019,99
4/1/2019,81
Data in console:
D3 Code:
var parseDate = d3.time.format("%Y-%m-%d").parse;
//coerce data to dates
data.forEach(function (d) {
d.letter = parseDate(d.letter);
console.log(d.letter)
});
//set margins
var margin = {top: 40, right: 20, bottom: 60, left: 40},
width = 1000 - margin.left - margin.right,
height = 200 - margin.top - margin.bottom;
var formatPercent = d3.format(".0%");
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")
.tickFormat(d3.time.format("%Y-%m"));
var yAxis = d3.svg.axis()
.scale(y)
.orient("left")
var svg = div.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 + ")");
r2d3.onRender(function(data, s, w, h, options) {
x.domain(data.map(function(d) { return d.letter; }));
y.domain([0, d3.max(data, function(d) { return d.frequency; })]);
svg.append("g")
.attr("class", "x axis")
.attr("transform", "translate(0," + height + ")")
.call(xAxis)
.selectAll("text")
.attr("transform", "rotate(270)")
.attr('dx', '-1.9em');
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.frequency); })
.attr("height", function(d) { return height - y(d.frequency); })
.on('mouseover', tip.show)
.on('mouseout', tip.hide)
});
function type(d) {
d.frequency = +d.frequency;
console.log(d);
return d;
}
Current Chart:
What I want:
Here's how D3 suggests filtering ordinal scales. This should only show your January ticks
var xAxis = d3.svg.axis()
.scale(x)
.orient("bottom")
.tickValues(x.domain().filter(function(d, i) { return !(i % 12); }))

D3 Bar Chart Columns Overflowing

I am having an issue using d3 to create a bar chart where the column overflows the and the y axis labels are incorrect. Here is a fiddle http://jsfiddle.net/fajgvj9v/ that shows the issue. The data is parsing the <pre id="data"> tag to simulate a CSV I am using. If you change the value of 'a' to 5000 from 4000 it renders as expected.
<pre id="data">
name,count
a, 4000
b, 500
</pre>
yTitle = "Items";
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 xAxis = d3.svg.axis()
.scale(x)
.orient("bottom");
var y = d3.scale.linear()
.rangeRound([height, 0]);
var yAxis = d3.svg.axis()
.scale(y)
.orient("left")
.tickFormat(d3.format(".2s"));
var svg = d3.select("#malware_by_os").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 = d3.csv.parse( d3.select("pre#data").text() );
console.log(data);
var xLbl = d3.keys(data[0])[0];
var yLbl = d3.keys(data[0])[1];
data.sort(function(a, b) {
return b[yLbl] - a[yLbl];
});
x.domain(data.map(function(d) {
return d[xLbl];
}));
y.domain([0, d3.max(data, function(d) {
return d[yLbl];
})]);
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(yTitle);
svg.selectAll(".bar")
.data(data)
.enter().append("rect")
.attr("class", "bar")
.attr("x", function(d) {
return x(d[xLbl]);
})
.attr("width", x.rangeBand())
.attr("y", function(d) {
return y(d[yLbl]);
})
.attr("height", function(d) {
return height - y(d[yLbl]);
});
The max function needs to convert to a number using +
y.domain([0, d3.max(data, function(d) {
return d[yLbl];
})]);
should be
y.domain([0, d3.max(data, function(d) {
return +d[yLbl];
})]);

Filter with d3.js

I have a big problem.
I use d3 to visualize my (poll)data. (So Questions and answers) It works fine except one problem.
Sometimes it doesn't visualize the data like they are. For example one time d3 get all right data about d3.json. But the graph is not right. It should load 300 answers in the first bars but it just show 50. I tested it and the json works.
I tried to filter the graph and I got the same problem.
This is my d3 code.
<div>
<script src="http://d3js.org/d3.v3.js"></script>
<script>
var margin = {
top: 20,
right: 30,
bottom: 30,
left: 430
},
width = 1400 - margin.left - margin.right,
height = 500 - margin.top - margin.bottom;
var xScale = d3.scale.ordinal()
.rangeRoundBands([0, width], .1);
var yScale = d3.scale.linear()
.range([height, 0]);
var xAxis = d3.svg.axis()
.scale(xScale)
.orient("bottom");
var yAxis = d3.svg.axis()
.scale(yScale)
.orient("left")
.ticks(10);
var svg = d3.select("body")
.append("svg")
.attr("width", width + margin.left + margin.right)
.attr("height", height + margin.top + margin.bottom)
.attr("class", "chart");
var chart = svg.append("g")
.attr("transform", "translate(" + margin.left + "," + margin.top + ")");
d3.json("getdata.php", function(error, data) {
xScale.domain(data.map(function(d) {
return d.text;
}));
yScale.domain([0, d3.max(data, function(d) {
return d.count;
})]);
chart.selectAll(".bar")
.data(data)
.enter()
.append("rect")
.attr("class", "bar")
.attr("x", function(d) {
return xScale(d.text);
})
.attr("y", function(d) {
return yScale(d.count);
})
.attr("height", function(d) {
return height - yScale(d.count);
})
.attr("width", xScale.rangeBand())
chart.append("g")
.attr("class", "x axis")
.attr("transform", "translate(0," + height + ")")
.call(xAxis);
chart.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("Antworten");
});
function type(d) {
d.count = +d.text;
return d;
}
</script>
</div>
I guess the problem starts here. But I don't know why. The problem doesn't appear at every question. Only at a few or when I try to use my filter.
Maybe it happens when two values have a big difference?
Update:
It is like: D3 doesn't want to lose the smallest bar. So other bars must based on that smallest. And then the values are not correct for the bigger bars. Maybe the Y scale depends on the smallest bar.

D3 bar chart with variable width and variable length data up to 1000 data points

I am having a lot of trouble with D3 bar chart where the length of the data I get from search is variable. I used the D3 bar chart example and built this. However as data length goes up, the graph gets less and less legible. The problem seems to be the range gets confused when it is beyond 100 points or so.
Code is below:
function makegraph(data,ctype) {
//var data=xdata.splice(-900)
var gwidth=data.length*2;
if(gwidth < 800) gwidth=800;
//gwidth=800
var margin = {top: 9, right: 20, bottom: 30, left: 90},
width = gwidth - margin.left - margin.right,
height = 300 - margin.top - margin.bottom;
x = d3.scale.ordinal()
.rangeRoundBands([0, width], .1);
//x=d3.scale.linear().domain([0,1]).range(0,width)
var y = d3.scale.linear()
.range([height, 0]);
var xAxis = d3.svg.axis()
.scale(x)
.orient("bottom")
.tickFormat(function(d) { if (d % 10) return ""; else return d;})
var yAxis = d3.svg.axis()
.scale(y)
.orient("left");
// .ticks(10, "%");
d3.select("svg").remove()
var svg = d3.select("#graphchart").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 line = d3.svg.line()
.x(function(d) { return x(d.rowid); })
.y(function(d) { return y(d[ctype]); });
x.domain(data.map(function(d) { return d.rowid; }));
var ymax=d3.max(data, function(d) { return d[ctype]; });
var ymin=d3.min(data, function(d) { return d[ctype]; });
y.domain([ymin, ymax]);
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", Math.log10(ymax))
.attr("dy", ".71em")
.style("text-anchor", "end")
.text("Bytes");
// console.log(x.rangeBand())
var bar = svg.selectAll(".bar")
.data(data);
bar.enter().append("rect")
.attr("class", "bar")
.attr("x", function(d) { return x(d.rowid); })
.attr("width", x.rangeBand())
.attr("y", function(d) { return y(d[ctype]); })
.attr("height", function(d) { var xya= height - y(d[ctype]); /* console.log(xya+":"+d[ctype]); */ return height - y(d[ctype]); })
/* .attr("title", function(d) { return d['bytes']+" Bytes at "+d.stime; }) */
.on("mouseover", function(d) { $("#graphinfo").html(d3.format('0,000')(d['bytes'])+" Bytes at "+d.stime) })
.on("mouseout",function(d) { $("#graphinfo").html(' ')})
.on("click",function(d) { tablegraph(d)});
$('.bar').tooltip()
}
Do you have suggestions how I can make this graph so that the bar chart will grow horizontally for larger data sets? Thanks for any help and suggestions!
Vijay

Multiple Bar charts with fixed y-axis to highlight the different as shown in fig

I looking any chart library which has configuration for custom y-axis values. I want to customize the y-axis like ( 0 to 3). I seen D3 and other chart libraries, the Y-axis automatically generates the values. I my design there is only one filed and on one for compare on the x-axis.
Which chart library is most suited for this condition to make this happen. If any example already on google, please share...
If you are looking for a D3 solution then you can refer my fiddle below:
http://jsfiddle.net/cyril123/7ftuumv4/2/
code:
var margin = {
top: 20,
right: 20,
bottom: 30,
left: 40
},
width = 960 - margin.left - margin.right,
height = 500 - margin.top - margin.bottom;
//specify data here
data = [{letter: "1", value: 1.3}]
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 + ")");
//as you have a fixed x axis value and single data
x.domain([data[0].letter]);
//as you have a fixed range for y axis
y.domain([0, 3]);
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("Value");
//make the bar chart
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.value); })
.attr("height", function(d) { return height - y(d.value); });

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