AmCharts - set max value axis using dataprovider - javascript

I'm trying to set max value axis using dataprovider, since I'm dynamically loading data in my bar chart I need to see the "progress" on one of the bars compared to the one that is supposed to be the total.
How do I achieve this?
I' tried with:
"valueAxes": [
{
"id": "ValueAxis-1",
"stackType": "regular",
"maximum": myDataProviderAttribute
}
But no luck.
Any suggestion will be much apreciated.

I've submited a ticket to AmCharts support and got this feedback:
You can set max before the chart is initialized based on the data you have, inside addInitHandler. Here is an example for a simple column chart:
AmCharts.addInitHandler(function(chart) {
// find data maximum:
var min = chart.dataProvider[0].visits;
for (var i in chart.dataProvider) {
if (chart.dataProvider[i].visits > max) {
max = chart.dataProvider[i].visits;
}
}
// set axes max based on value above:
chart.valueAxes[0].maximum = max + 100;
chart.valueAxes[0].strictMinMax = true;
});
You may need to use strictMinMax as above to enforce the value:
https://docs.amcharts.com/3/javascriptcharts/ValueAxis#strictMinMax
Example of setting minimum inside addInitHandler:
https://codepen.io/team/amcharts/pen/b4be8cb4e3c073909860720e0909a876?editors=1010
If you refresh the data, or use live data, then before you animate or validate the chart to show the updated data, you should recalculate the max and, if you want the axis to change then use chart.valueAxes[0].maximum = max; where max is something you calculate based on data input.
Here is an example:
function loop() {
var data = generateChartData();
chart.valueAxes[0].maximum = max;
// refresh data:
chart.animateData(data, {
duration: 1000,
complete: function () {
setTimeout(loop, 2000);
}
});
}
The lines above were used in this example:
https://codepen.io/team/amcharts/pen/d0d5d03cfdcc2cc256e28ec52ad8b95c/?editors=1010

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For that, I presume, I need to cycle at the end of the generation process through the charts and suppress the first two x-axis, kind like
for (i = 0; i < (Highcharts.charts.length - 1); i = i + 1)
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Here is the default fiddle.
I don't succeed in getting this to work. Can anyone help me out on this?
You can set the xAxis.visible property depending on the chart index:
success: function (activity) {
activity = JSON.parse(activity);
activity.datasets.forEach(function (dataset, i) {
...
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Live demo: https://jsfiddle.net/BlackLabel/cmdb5at0/
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I have created an highcharts stacked bar chart, but when the data is skewed, the bars are not visible or the numbers overlap, as shown in below image.
I have seen many posts, but there is no out of the box solution for this, so i am making my custom solution.
I am setting a default height of 150 if the y value is less than 150.
This solution works, but the total of the bars now is shown to be 300 instead of the actual original value. How can i change the total stacklabel value on my own? I am unable to find a way to do that.
Here is the code to change the height to default values. I am storing the actual value in realValue variable in the point object.
chartOptions = {
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However, using your code to get the wanted result, use stackLabels.formatter function:
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var series = this.axis.series,
x = this.x,
sum = 0;
series.forEach(function(s) {
if (s.points && s.points[x]) {
sum += s.points[x].realValue ? s.points[x].realValue : s.points[x].y
}
});
return sum;
}
Live demo: https://jsfiddle.net/BlackLabel/uocdykbL/
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is it possible with highcharts 5 to plot a point at the top of the chart?

I am wondering if it is possible to set the value of a series to always be the top of the current chart, more or less like using plotBands or plotLines.
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chart: {
events: {
load: function () {
const axis = this.yAxis[0]
const max = axis.max
const series = this.series[0]
axis.update({ max })
series.addPoint(axis.max, true, false, false)
}
}
},
example http://jsfiddle.net/qb2tn7jh/

Pass parameter to c3js tooltop after .generate() and before .load()

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For example: [1, 2, 5] => [0.2, 0.4, 1]
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I checked out http://c3js.org/samples/tooltip_format.html, which shows you can set tooltip as a function when you initially generate the C3 object. But I want to change the tooltip later on after I recalculate my original/scaled values and re-load() the graph.
All attempts I've made to explicitly change myGraph.tooltip.format.value = function (...) {...} after initially setting myGraph = C3.generate({...}) have been unsuccessful.
Any ideas how I can accomplish this without having to regenerate the graph from scratch every time?
You need to override internal.getTooltipContent
var data = ['data1', 30000, 20000, 10000, 40000, 15000, 250000];
// simple fake data
var fakeData = data.map(function (d, i) {
return i ? (d / 100) : d;
})
var chart = c3.generate({
data: {
columns: [
fakeData,
['data2', 100, 200, 100, 40, 150, 250]
],
}
});
// do code to take over mars and plant potatoes
// save the original
var originalGetTooltipContent = chart.internal.getTooltipContent;
chart.internal.getTooltipContent = function (data, defaultTitleFormat, defaultValueFormat, color) {
// we modified the first series, so let's change that alone back
var originalValue = {
id: data[0].id,
index: data[0].index,
name: data[0].name,
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I assume you are already doing something about the scaled y axis label?
Fiddle - http://jsfiddle.net/puf248en/
Thanks potatopeelings,
I did turn out solving this one by simply loading the form data in all at once, and then programmatically show/hide certain metrics. So that allowed me to use all the generate() options as intended.
Did try out your solution, and it seemed to do the trick till I found the simpler option. Thanks!

Remove hours from time series

Dygraphs allows easy display of time series...
However, if my data contains only two data points, it automatically fills the gaps in X axis with hours. Is it possible to disable this functionality?
I searched and tried many options but not found anything useful.
Example might be the 'Time Series Drawing Demo' from the gallery - if executed on only few datapoints, it fills the 'gaps' with hours.
This is a good example:
g = new Dygraph(document.getElementById('plot'),"a,b\n2008-12-01,0.9\n2008-12-02,0.3\n2008-12-03,0.7\n")
UPDATE- this seems to be working:
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var chosen = Dygraph.pickDateTickGranularity(a, b, pixels, opts);
if(chosen==12) chosen=13;
if (chosen >= 0) {
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One way to modify the default calculation is by using the pixelsPerLabel option.
Example: http://jsfiddle.net/kaliatech/P8ehg/
var data = "a,b\n2008-12-01,0.9\n2008-12-02,0.3\n2008-12-03,0.7\n";
g = new Dygraph(document.getElementById("plot"), data, {
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});
This requires hard coding a pixel width though, and it is still ultimately dependent on the data set that you are graphing. A more flexible approach might be to use the ticker option, allowing you to supply your own function for calculating label granularity. See the documentation and built-in functions of dygraph-tickers.js.
See also:
How to set specific y-axis label points in dygraphs?
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title: 'Example for changing x-axis label granularity 3',
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//Force to DAILY if built-in calculation returned SIX_HOURLY
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// chosen=Dygraph.DAILY;
//or
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if (chosen >= 0) {
return Dygraph.getDateAxis(a, b, chosen, opts, dygraph);
} else {
return [];
}
}
}
}
});

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