I have no clue, why my data stream is not working correctly. I have 2 data-streams. One with negative values and one with positive values.
The problem is, that stream 2 (blue bars) is not starting at the zero line in my chart. The bars are much to height - around 200px (hidden downwards)
Did someone have an idea why this happens? Could it be the cause, that the streams are not equal?
nv.addGraph(function() {
var chart = nv.models.multiBarChart();
chart.xAxis
.tickFormat(d3.format(',f'));
chart.yAxis
.tickFormat(d3.format(',.1f'));
chart.multibar.stacked(true); // default to stacked
chart.showControls(false); // don't show controls
d3.select('#chart svg')
.datum(myData.uas.data)
.transition().duration(500).call(chart);
nv.utils.windowResize(chart.update);
return chart;
});
Fiddle
Hope someone could give me a hint.
Cheers K.
Related
I have a bar chart with in dc.js. The x axis is dimension and y is the measure ranging from 1 - 10k. I want to show all the bars and their labels not overlapping each other. Chart looks fine when there are few bars when the number of bars starts to increase they look not okay. I am looking to auto resize the labels for the bar-chart.
Sample Chart
I tried this method of renderlet to change the fontsize automatically
stackedBarChart.on('renderlet', function(chart) {
chart.selectAll('text.barLabel')
.attr('transform', function(d) {
//How do i get/set the width of the label here ?
});
I tried the below and I am able to do dynamic label sizing. I used pretransistion and inside that fetched all bar lables and altered their font-size. The font sizing is altered according to Gordon's Idea, Getting each bar's size and and assigning the font size dynamically. For testing I have used .2 as a factor to reduce the font size.
.on('pretransition', function(chart) {
var chart_width = chart.width();
chart.selectAll("text.barLabel").attr('font-size', function(data) {
let total_bars = chart.group().all().length;
let sing_bar_width = Math.floor(chart_width / total_bars);
return (sing_bar_width * .2) + "px";
});
});
I would like to be able to recenter a Pie charts legend after it has been filtered. Slices/Legends will removed when filtering because we remove empty bins. I added a pretransition listener to chart2, but that seems to be to late because the legend y value is the previous value and not current.
.on('pretransition', chart => buildLegend (chart))
If Male is selected on the Gender Pie chart I want the 4 legend items on the Job Pie chart to be re-centered. Any suggestions?
You can see a jsFiddle example.
A little more digging around showed me how to reference and update SVG elements.
function recenterLegend(chart) {
chart.selectAll('g.dc-legend')
.attr('transform', function(d) {
let legendY = (300 - (chart.group().all().length * 16)) / 2;
let translate = 'translate(220,' + legendY + ')';
return translate ;
});
}
Here is the updated jsfiddle.
I am working on dc.js, i have draw pieChart
pieChart.width(300)
.height(200)
.transitionDuration(1500)
.dimension(startValue)
.group(startValueGroup, "StartValue")
.radius(100)
.minAngleForLabel(0.5)
.legend(dc.legend().x(230).y(0))
.title(function(d) {
return d.key + ": " + d.value;
})
.renderTitle(true)
.on("filtered", function (chart) {
dc.events.trigger(function () {
//console.log(total_payment);
});
});
Now, I want to set specific x axis value. Currently, pieChart taking center position of define width and height. That mean it's taking position of (150,100). I want to change this position to (100, 100).
How can i change position of x axis as per above code?
You can't set this directly in the dc options, but you can modify these values after the chart has been rendered. Assuming that "pie" is the ID of the DOM element that you rendered the pie chart into, you can do
d3.select("#pie > svg > g").attr("transform", "translate(100,100)");
I know it is an old post and that the answer works perfectly but when the chart is part of a bigger system (several charts) I found easier to add the above command directly to the chart by doing this:
pieChart.on('renderlet', function (chart) {
chart.select("svg > g").attr("transform", "translate("100,100)");
});
Edit:
Actually I just found out you can do:
.cx(100)
.cy(100)
which will set the centre of the pie chart to 100, 100 before render.
I have the following dataset:
var data = [
{
"air_used": 0.660985,
"datestr": "2012-12-01 00:00:00",
"energy_used": 0.106402
},
{
"air_used": 0.824746,
"datestr": "2013-01-01 00:00:00",
"energy_used": 0.250462
} ...
]
And I want to draw a bar graph (for air_used) and line graph (for energy_used) that look like this:
My problem is that at the moment, with the x-scale I'm using, the graph looks like this - basically the bars are in the wrong position, and the last bar is falling off the chart:
Here is a JSFiddle with full code and working graph: http://jsfiddle.net/aWJtJ/4/
To achieve what I want, I think I need to amend the x-scale so that there is extra width before the first data point and after the last data point, and so that the bars are all shifted to the left by half the width of each bar.
Can anyone help me figure out what I need to do with the x-scale?
I've tried adding an extra month to the domain - that stops the last bar falling off the end of the graph, but it also adds an extra tick that I don't want, and it doesn't fix the position of the line graph and ticks.
If possible I want to continue to a time scale for the x-axis, rather than an ordinal scale, because I want to use D3's clever time-based tick formatters and date parsers, e.g. xAxis.ticks(d3.time.weeks, 2).
Expand your domain to be +1 and -1 month from the actual extent of your data. That will pad the graph with the extra months on either side and then update the bar width to add 2 to the count of data elements.
var barRawWidth = width / (data.length + 2);
See this fiddle: http://jsfiddle.net/reblace/aWJtJ/6/
If you want to hide the lower and upper boundary months, you can hack it like this: http://jsfiddle.net/reblace/aWJtJ/7/ by just adding and subtracting 20 days instead of a whole month, but there are probably more elegant ways to do it.
var xExtent = d3.extent(data, function(d) { return d.date; });
var nxExtent = [d3.time.day.offset(xExtent[0], -20), d3.time.day.offset(xExtent[1], 20)];
x.domain(nxExtent);
As pointed out in the comments, I think the best approach is to use d3.scale.ordinal. Note that using it doesn't prevent you from using d3.time parsers, but you need to take into account the bar width to align the line with the bars.
An example solution is here:
http://jsfiddle.net/jcollado/N8tuR/
Relevant code from the solution above is as follows:
// Map data set to dates to provide the whole domain information
var x = d3.scale.ordinal()
.domain(data.map(function(d) {
return d.date;
}))
.rangeRoundBands([0, width], 0.1);
...
// Use x.rangeBand() to align line with bars
var line = d3.svg.line()
.x(function(d) { return x(d.date) + x.rangeBand() / 2; })
.y(function(d) { return y(d.energy_used); });
...
// Use x.rangeBand() to set bar width
bars.enter().append("rect")
.attr("class", "air_used")
.attr("width", x.rangeBand())
...
Note that date parsing code has been moved up to have d.date available when creating the x scale. Aside from that, d3.time statements have not been modified at all.
Hey so I'm having difficulty with the positioning of my stacked bar chart. It's showing up, I'm just having difficulty declaring it's x axis. Here is the jsfiddle: http://jsfiddle.net/E2HST/
var xTimeScale = d3.time.scale().
domain([new Date(data[0].date), d3.time.day.offset(new Date(data[data.length - 1].date), 1)])
.range([0, width]);
is obviously part of the problem, I pulled code and have unfortunately fallen into the trap of not fully understanding it.
var bars = svg.selectAll(".bar")
.data(data).enter()
.append("g")
.attr("class","bar")
.attr("transform", function(d){
return "translate("+xTimeScale(d.date)+",0)"
})
I've tried swapping in d.year for d.date seeing as there is no more d.date but it's throwing up errors. Any help would be greatly appreciated.
The simple answer is that the objects in your data array do not have a date key, so your xTimeScale domain is undefined. An easy way to correct this would be to create this key for each data item:
data.forEach( function(d) { d.date = new Date(d.year, 0, 1); });
Which creates the date as January 1st of the year variable. This basically solves your x-axis problem.
I would, however, suggest that your data would be better suited to using an ordinal scale, since you only have yearly data.
A couple of other small things:
Your x-axis definition has way too many ticks, consider changing this
Consider adding css styles for .axis elements, to improve readability
An updated fiddle with these slight changes is at http://jsfiddle.net/E2HST/1/