How can I exclude a specific data series from showing in the tooltip with tooltip.trigger = axis?
I'm asking because I have a very complex graph with one line chart, two bar charts and one heatmap. And the heatmap has so many data that the tooltip ends up with too many lines. The heatmap values are not very important, so I would like to remove them from showing in the tooltip.
Right now I'm using formatter to exclude them, but is there any other way?
I do exactly the same: adding a new attribute to the series and checking it from formatter.
Something like this:
series: [{
// ...
showInTooltip: true
// ...
}]
// ----
formatter: series => {
var displayed = series.filter(item => item.showInTooltip);
// work with displayed where showInTooltip === true
}
Also you can store callback instead attribute and it will work.
Updated: Suddenly I found undocumented feature and it will solved you trouble by the right way, apparently.
series: [{
// ...
tooltip: {
show: false
}
// ...
}]
Related
Using vue-chartjs is it possible to change to color of the bar?
This is similar to this question which is based on chart.js
chart.js bar chart color change based on value, and the jsfiddle provided in the answer is exactly what I'm looking for, except within vue-chartjs.
Any help appreciated
So this should be your chart calling (in my case, I named it bar-chart)
<bar-chart
:chart-data="barData"
:options="barChartOptions">
</bar-chart>
:chart-data and :options are 2 props defined when I create my bar component:
Vue.component('bar-chart', {
extends: VueChartJs.Bar,
props: ['chartData', 'options'],
So your barData, should be an object like this:
{datasets: [...], labels: [...]}
Your dataset is an array with the charts you want to show. So if you want to show only 1 data, than your array only has one position. So let's assume that by now. We'll use dataset = dataset[0]
Your dataset accepts some properties, 2 of them are a must:
Data (an array with the data you want to show)
Label (the name of the label when you hover on the bardata. It should display "Label: value"
It also accepts some other properties like:
fill
hoverBackgroundColor
backgroundColor
check more here: https://www.chartjs.org/docs/latest/charts/bar.html
so now, your backgroundColor property is either a color value (e.g. red, #FF0000), or an array.
If it is an array, then this should be true dataset.bgColors.length === dataset.data.length
and each dataset.bgColors array position is the color of the respective value in the dataset.data array.
dataset: {
data: [1,2,-3,-4,2,1]
backgroundColor: ['green', 'green', 'red', 'red', 'green', 'green']
...
}
So now, you can just build a bgColors array with the color you want, based on your data.
------------- UPDATING THE DATA -----------------
To anybody else who is looking for a way to UPDATE your chart data after it was rendered. It's a different question, but to help the community:
When you set your chart component, you can define a watch for the chartData prop, so when the chartData changes, the method is called and you re-render the chart:
Vue.component('bar-chart', {
extends: VueChartJs.Bar,
props: ['chartData', 'options'],
methods: {
renderLineChart () {
this.renderChart(this.chartData, this.options)
}
},
mounted () {
this.renderLineChart()
},
watch: {
chartData: function () {
this.$data._chart.destroy()
this.renderLineChart()
}
}
})
IMPORTANT: Make sure you make a new copy of the new chartData object info because the watch will only check if the object itself changed, not its inner properties.
However, if you really want to change ONLY the dataset.data or dataset.backgroundColor or any other, than the watcher will not know it changed. You can use the property deep: true in the watcher for this, as it will check changes deep inside the chartData object:
watch:
chartData: {
handler: function () {
this.$data._chart.destroy()
this.renderLineChart()
},
deep: true
}
}
I hope the answer was clear for everyone.
Best regards
I would like to ask how can I position bottom labels using ChartJS library to display them like on the image below:
I tried to find it in official docs, but without the luck.
Many thanks for any advice.
In the xAxe ticks attribute, you can edit the userCallback property to change what is displayed on your labels. Furthermore, if you return an array of strings, every string will be displayed with line breaks.
So if you combine these two informations, you'll get the following :
options: {
scales: {
xAxes: [{
ticks: {
userCallback: function(tick, value, ticks) {
// `ticks` is the default display
// `.split("")` makes it an array of every character
return tick.split("");
}
}
}]
}
}
You can see a working example on this jsFiddle and here is its result :
I need to create a pie chart with labels indicating what each area means, but also another info overimposed over each area. If I use both data labels and a legend, they'll show the same text. How can I have both with different texts, or emulate that effect?
A mock of what I'd like to get:
Using the format or formatter config properties of the dataLabels, you can make them say whatever you want.
pie: {
dataLabels: {
enabled: true,
formatter: function(){
return 'Y Value: ' + this.y; // y value
}
},
showInLegend: true
}
Quick example.
I am making simple line chart in kendo. Something like this demo http://demos.telerik.com/kendo-ui/dataviz/line-charts/index.html.
I also have mulitple series as on example(India,World etc...).
My question is, is there way to allow that only one serie is active on chart.
Series behave like checkbox button(I can have one or more active) and I want them to behave as radio button so only one serie can be active.
The short answer is No. You cannot modify the legend in anyway to achieve such behavior. However you can use radio buttons separately and update the options of the chart - such as the series.
Here is a small JsBin example:
$("input[type=radio]").click(function(){
var clickedOn = $(this).val();
var data = $.grep(series, function(val){
return val.name == clickedOn;
})[0];
chart.setOptions({series:[
{
name: clickedOn,
data: data.data
}
]})
})
You can do this with a button. Haven't tried it with a radio button.
$("#ButtonName").kendoButton({
click: function (e) {
var varname = $("#chartName").data("kendoChart")
kendodatasourcename.filter(
{ field: "fieldName", operator: "eq", value: "filteredvaluefromyourdataset" })
I'm using the following piece of code to display a set of bar charts in jqPlot. However, I am getting 2 problems:
There is no padding on either side of the range values for the xaxis. The pad attribute seems to have no effect.
When the number of bars is large, the bars overlap on top of each other. The barPadding attribute seems to have no effect.
I looked at this link Having problems with jqPlot bar chart . The answer suggested there was to use a CategoryAxisRenderer. But since I'm using time-series data, I require the DateAxisRenderer.
Please help.
function plotBarGraph(data,myticks,series)
{
$("#placeholder").empty();
$.jqplot('placeholder',data,
{
//stackSeries:true,
seriesDefaults:{
renderer:$.jqplot.BarRenderer,
barMargin:1,
barPadding:0.5
},
axes:
{
xaxis:
{
ticks:myticks,
tickInterval:10,
renderer:$.jqplot.DateAxisRenderer,
pad:2.5,
tickOptions:
{
formatString:'%d-%m-%y'
}
}
},
legend:
{
show:true,
labels:series
}
});
}
In this case if you do not want to use the approach mentioned in the link, you might want to play with min/max values for your date axis.
I think you might also find useful the approach to a similar sort of problem with padding where I chose to set ticks on creation and hide the unwanted ones after the plot is drawn.
Before I can be of any further assistance please provide a sample presenting your problem.
For your second problem, I ran into a similar issue. I set up a selection statement that widened the size of my chart depending on how many bars would be in it. I then made the parent div scrollable (called "dataHolder"), and that solved the problem.
// set div properties depending on how many sets of data are in the
//array so the view is sized properly
$("#chartDiv").html("").css("width", "750px"); // chartDiv's default settings
$("#tabs-6").removeClass("dataHolder").css("width", "900px"); // parent Div's default settings
if (dataArray.length > 10) {
$("#chartDiv").css("width", "1600px");
$("#tabs-6").addClass("dataHolder").css("width", "900px");
} else if (dataArray.length > 6) {
$("#chartDiv").css("width", "1200px");
$("#tabs-6").addClass("dataHolder").css("width", "900px");
}
I found a solution to use Date data with CategoryAxisRenderer. You have to configure de xaxis like follows:
axes: {
xaxis: {
renderer: $.jqplot.CategoryAxisRenderer,
rendererOptions: {
tickRenderer: $.jqplot.DateTickRenderer,
tickOptions: {
formatter: $.jqplot.DateTickFormatter,
formatString:'%d/%m'
}
}
}
}
I hope it helps! ;)