I have areacharts with 2 series. Each of both has the same data, but different values. When I select one of the point, I want to know index of point. For example. when I select first point, I want take "1" and so on. Like here.
For instance they used
formatter: function() {
return 'point ' + this.point.myIndex;
}
but it is for javascript
formatter: function() {
return 'point ' + this.point.myIndex;
}
Does anybody know how to do it from gwt wrapper Moxie Apps GWT Highcharts?
Related
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
}
// ...
}]
I'm fetching the chart dynamically ..
This is chart of current month which ranges from 1-31
I want to have a range filter for example:
2012/01/1 to 2014/01/1
How can I do this labels will be too many?
Lets say I decide on doing it yearly but what if the user want to see from this year jan to nov i should make it monthly then how I can know? if its monthly or yearly or what is the best way to do this?
I think it would be the best to add two tabs with names monthly and yearly, so user can easy click on tab to change views. For example on monthly view, it will be too much to show all months in one chart(I think it will be mess with data), you should do this only with one month. Just add datetimepicker only with months(same for years), on change you can call function which will change chart also(see here how it works https://www.tutorialspoint.com/How-does-jQuery-Datepicker-onchange-event-work). Also you can set the range of years.
So, now when you have function which will change chart, just change data by getting selected month and your data for this month. There is an update function, which you can call when you have updated data and it will change chart(See docs: https://www.chartjs.org/docs/latest/developers/updates.html).
Here is an example of code for adding new dataset to existing chart by clicking button:
document.getElementById('addDataset').addEventListener('click', function() {
var colorName = colorNames[barChartData.datasets.length % colorNames.length];
var dsColor = window.chartColors[colorName];
var newDataset = {
label: 'Dataset ' + (barChartData.datasets.length + 1),
backgroundColor: color(dsColor).alpha(0.5).rgbString(),
borderColor: dsColor,
borderWidth: 1,
data: []
};
for (var index = 0; index < barChartData.labels.length; ++index) {
newDataset.data.push(randomScalingFactor());
}
barChartData.datasets.push(newDataset);
window.myBar.update();
});
Just in case anybody was searching and found this thread because they wanted dynamic units for their plotted points in Chart.js, then the below code will give you and idea of how to configure your options -> tooltips -> callbacks -> label
options: {
tooltips: {
callbacks: {
label: (item) => {
if (condition1 == true) {
return (item.yLabel / 1000000000).toFixed(2) + ' Gbps'
}
else if (condition2 == true) {
return (item.yLabel / 1000000).toFixed(2) + ' Mbps'
}
else if (condition3 == true) {
return (item.yLabel / 1000).toFixed(2) + ' Kbps'
}
else {
return item.yLabel.toFixed(2) + ' bps'
}
},
},
},
},
This is an example that converts bps to Kbps, Mbps, Gbps, etc. as necessary.
Hey I'm using chartJS and I have a graph that looks like this:
As you can see the data points overlap each other which makes it harder to read. In RStudio there is a solution for that you simply set position="jittering" and it will add a slight noise around the dots.
Unfortunately, there is no such capability in chart.js today. However, that doesn't mean you can't still get the functionality that you want. There are a couple of options that come to mind.
1) Implement your own jitter function and use it to pre-process your data before passing to chart.js. Here is an example.
var jitter = function(data) {
return data.map(function(e) {
var xJitter = Math.random() * (-1 - 1) + 1;
var yJitter = Math.random() * (-1 - 1) + 1;
return {
x: e.x + xJitter,
y: e.y + yJitter,
}
});
};
Here is a codepen example showing a side by side example of charts with original and jittered data.
2) Use the jitter function above and add it as a chart.js plugin such that you can enable/disable it automatically in any given chart. Here is an example (note that we are using the jitter function above.
Chart.plugins.register({
afterInit: function(chartInstance) {
if (chartInstance.config.options.jitter) {
var helpers = Chart.helpers;
var ctx = chartInstance.chart.ctx;
chartInstance.data.datasets.forEach(function (dataset) {
dataset.data = jitter(dataset.data);
});
}
}
});
Then just add this into your charts options config.
options: {
jitter: true,
}
Here is a codepen example showing a side by side example of charts with original and jittered data using the plugin.
Obviously, you would want to implement a much more robust jitter function that accepts some sort of jitter options so that it can be intelligently applied to any type of dataset. I'll leave that for you to implement if you decide to take this approach.
Does anyone know if it's possible to change the increment value of the number "spinner" in a Kendo UI grid field? I know it can be done in a stand-along numbericTextBox but I haven't been able to find any information about values inside a grid.
Ideally I'd like it so when I increment or decrement using the up and down arrows, it does so by .5 instead of 1.
I know this is late but for future reference, you can use the editor field for manipulating your numeric textbox.
{ 'field': 'count', title: 'Count', editor: numericEditor }
In your js file, you initialize the numeric textbox
function numericEditor(container, options) {
$('<input type="number" data-bind="value:' + options.field + '"/>')
.appendTo(container)
.kendoNumericTextBox({
min: 1,
step: .5,
});
}
Here's a Dojo for demo
I use primefaces 4.0 barchart, but i want to modify some default proprieties. This is my xhtml page
<p:barChart id="chart" value="#{marchebean.model}" legendPosition="ne" xaxisLabel="Année" yaxisLabel="Montant en DT" title="Factures payés par années" />
What i want to do
1.I want to separate between hundreds , thousands and millions in y axis by a space i.e changing the format of my numbers , i use NumberFormat.getNumberInstance(Locale.FRANCE).format(mynumber); in java but i don't know how to achieve this with charts in primefaces.
I want to display on the top of every bar the value setted in backing bean and change it's size.
Edit
Separation between thousand done, but i still don't know how display values above every bar or change their size. this is my new code
<p:barChart id="chart" value="#{marchebean.model}" extender="ext" style="height:600px;" legendPosition="ne" xaxisLabel="Année" yaxisLabel="Montant en DT" title="Factures payés par années" />
<script type="text/javascript">
function ext() {
this.cfg.axes.yaxis.tickOptions = {
formatString: "%'i"
};
this.cfg.seriesDefaults={
renderer: $.jqplot.BarRenderer,
pointLabels:{show:true}
},
$.jqplot.sprintf.thousandsSeparator = ' ';
}
</script>
First question
You can fulfill your need #1 using an extender.
Here's the related excerpt from Primefaces' manual regarding extenders:
3.14.15 Extender Chart API provide high level access to commonly used jqplot options however there are many more customization options
available in jqplot. Extender feature provide access to low level apis
to do advanced customization by enhancing the configuration object,
here is an example to increase shadow depth of the line series where
model's extender property is set to "ext".
<p:chart type="line" model="#{bean.model}" />
function ext() {
//this = chart widget instance
//this.cfg = options
this.cfg.seriesDefaults = {
shadowDepth: 5
};
}
Refer to jqPlot docs for available options.
Note: in Primefaces 4.0, the extender function name is provided as an attribute of the component tag, eg. <p:barChart extender="ext" .../>
To use whitespaces as thousands separator, use the following extender:
function ext() {
this.cfg.axes.yaxis.tickOptions = {
formatString: "%'i"
};
$.jqplot.sprintf.thousandsSeparator = ' ';
}
Second question
You will also manage to do it making some tweaking in your extender.
For example, the following piece of configuration will display values above every bar:
seriesDefaults: {
renderer: $.jqplot.BarRenderer,
pointLabels:{show:true}
},
And just use some CSS to change the size!
--
Zim