When zooming into data that I am formatting as quarterly, the xAxis labels are out of order (i.e.
4th quarter comes before 2nd quarter.) The tooltips are correct however. For both, I'm setting the format as "%Y Q%Q" and %Q is defined by:
Highcharts.dateFormats = {
Q: function(timestamp) {
var date = new Date(timestamp);
switch(date.getMonth() + 1) {
case 1: case 2: case 3: return 1;
case 4: case 5: case 6: return 2;
case 7: case 8: case 9: return 3;
default: return 4;
}
}
}
Any ideas or suggestions where to start looking would be great. I've played around with different configuration options, but can't find anything that seems to affect it. Thanks!
See it in action at: http://research.stlouisfed.org/fred2/graph/graph-landing.php?id=GDPC1&cosd=2010-01-01&coed=2012-01-01
Edit: here is a JS Fiddle with a basic highcharts chart showing the same problem http://jsfiddle.net/MJCsw/1/
In general it is wrapper for highcharts (fredchart), but in default highcharts you can use formatter (ie. for tooltip or axis labels) and customise format. Additioanly you can set tickInterval which will be 31 * 24 * 3600 * 1000.
I was able to fix this by changing date.getMonth() to date.getUTCMonth() in my quarter calculation. It's strange the tooltip was correct without it though, there must be some timezone correction being done on the tooltips but not the axis labels.
Related
https://www.amcharts.com/demos/date-based-line-chart/
In above have a LineSeries Chart with positive and negative values with different line colors but tooltip have only negative value color.
Can this possible to have positive line have different color of tooltip and negtive have another tooltip color?
Yes, it's totally possible.
Firstly, to adjust the background color of a tooltip, you'll need to kill its default behavior of grabbing color information from the calling object (in this case it gets the fill from the series). That's done via:
series.tooltip.getFillFromObject = false;
Then to adjust the background:
series.tooltip.background.fill = // color here
To switch its background color based on the value it's showing, one way we can do that is use an adapter for the series' tooltipText, because when that triggers we know the tooltip is being shown and/or changing. In there we can detect the current dataItem being sourced, check the value, and adjust the tooltip's background fill accordingly.
Sample code:
series.tooltip.getFillFromObject = false;
series.tooltip.background.fill = "blue";
series.adapter.add("tooltipText", function(tooltipText) {
if (series.tooltipDataItem.dataContext.visits < 0) {
series.tooltip.background.fill = "red";
} else {
series.tooltip.background.fill = "blue";
}
return tooltipText;
});
Demo:
https://codepen.io/team/amcharts/pen/913514e19a189c8779e07ffcae861ce3
I am using amcharts 4 to display temperature lines. At times there are many stations so I would like to have just one tooltip and just for the value the cursor is at instead of one tooltip for every line (because then they overlap and some are unreadable).
And there might be several stations with the same temperature so I would have to list all of them in the tooltip.
Anyone knows how to achieve that?
In amcharts 3 I used a balloonFunction attached to the graphs to create my own tooltip. But yet I couldn't find how to do it with the series in amcharts 4.
Thanks for a hint!
So as David Liang mentioned, since all the data items converge along their x axis value (a datetime in this case), you can limit tooltips down to one by only setting one series' tooltipText, and it will have access to the rest of the data fields via data placeholders. E.g. even though series1's value field is E852_t4m, it can use series30's value by just putting "{median_tBel}".
But if you want to have a tooltip based on which line you're hovering over, how to do that depends whether or not you require the Chart Cursor.
If you don't need it, simply set the tooltipText on the line's bullets, e.g.
series1.bullets.getIndex(0).tooltipText = "{name} {valueY}°C";
Here's a demo of your fiddle with that:
https://codepen.io/team/amcharts/pen/803515896cf9df42310ecb7d8d7a2fb7
But if you require Chart Cursor, unfortunately there isn't a supported option at the moment. There's a kind of workaround but it's not the best experience. You start with doing the above. The Chart Cursor will trigger hover effects on all lines and their bullets, including triggering their tooltips. A bullet's tooltip is actually its series' (series1.bulletsContainer.children.getIndex(0).tooltip === series1.tooltip). If we remove the reference to the bullet's tooltip, e.g. series1.bullets.getIndex(0).tooltip = undefined;, the chart will check up the chain and refer to series' anyway. If we do the same to the series' tooltip, it'll go up the chain to chart.tooltip, if we do this to all series, we basically turn chart.tooltip into a singleton behavior of sorts. But it's not as responsive to mouseovers.
You'll see what I mean with this demo:
https://codepen.io/team/amcharts/pen/244ced223fe647ad6df889836da695a8
Oh, also in the above, you'll have to adjust the chart's tooltip to appear on the left/right of bullets with this:
chart.tooltip.pointerOrientation = "horizontal";
Edit:
Since the first method sufficed, I've updated it with an adapter that checks for other fields in range. In the adapter, the target will be the CircleBullet, target.dataItem.valueY is the currently hovered value, and target.dataItem.dataContext are the other fields at the same date.
This is how I modified tooltipText to show other series within +/-0.5C range of the currently-hovered bullet:
// Provide a range of values for determining what you'll consider to be an "overlap"
// (instead of checking neighboring x/y coords.)
function inRange(valueA, rangeA, rangeB) {
return valueA >= rangeA && valueA <= rangeB;
}
// Provide adapters for tooltipText so we can modify them on the fly
chart.series.each(function(series) {
series.bullets
.getIndex(0)
.adapter.add("tooltipText", function(tooltipText, target) {
// the other data fields will already match on the date/x axis, so skip
// the date and this bullet's data fields.
// (target.dataItem.component is the target's series.)
var skipFields = ["date", target.dataItem.component.dataFields.valueY];
// this bullet's value
var hoveredValue = target.dataItem.valueY;
// all the other data fields at this date
var data = target.dataItem.dataContext;
// flag for adding additional text before listing other nearby bullet values
var otherPoints = false;
Object.keys(target.dataItem.dataContext).forEach(function(field) {
// if the field is neither date, nor bullet's
if (!~skipFields.indexOf(field)) {
if (inRange(data[field], hoveredValue - 0.5, hoveredValue + 0.5)) {
if (!otherPoints) {
tooltipText += "\n\nOthers:";
otherPoints = true;
}
// Keep {data placeholder} notation to retain chart formatting features
tooltipText += "\n" + field + ": {" + field + "}°C";
}
}
});
return tooltipText;
});
});
If your series' data points have different x values, it's impossible to combine all the information into one tooltip.
But if they do have same x values, you can just turn on the tooltip for just one of the series:
...,
series: [{
type: "LineSeries",
tooltipHTML: `xxx`,
...
}, {
type: "LineSeries",
...
}, {
type: "LineSeries",
...
}],
...
And within the tooltip HTML, you have access to the data:
...,
tooltipHTML: `
<strong>Year: </strong>{year}<br />
<strong>Cars: </strong>{cars}<br />
<strong>Motorcycles: </strong>{motorcycles}<br />
<strong>Bicycles: </strong>{bicycles}
`,
...
demo: http://jsfiddle.net/davidliang2008/aq9Laaew/286519/
I have a datetime chart to show daily data within 3 years in a series,
I set the x-Axis formatter to display month of a year in the general view
Screen Capture of General View
I set the 'zoomtype' to 'x', when it zoom to daily level,
the x-axis still show the month base on the formatter I set before
Screen Capture zoomto daily level
How can I change my x-axis formatter when detect zoom action?
formatter: function () { // Single digit month
var mth = Highcharts.dateFormat('%b', this.value).replace(/^[0]+/g, " ");
var year = Highcharts.dateFormat('%Y', this.value);
if (mth == 'Jan')
return mth + '<br>' + year;
else
return mth;
},
Some Method I have tried, but failed :
1) Make 3 different x-axis stand for 'day', 'month' and 'year', add/remove those axis when different zoom level is detected
2) use chart.update() in selection event
3) use chart.redraw() in selection event
Thanks!!
update
Thanks Pawel, I have tried below syntax inside the xAxis Formatter, but seems cannot return the getExtremes correctly,
please kindly advice, thanks!!
var extreme = this.getExtremes();
var extreme = this.xAxis[0].getExtremes();
I have 3 datasets within my series (low, normal, high) displaying on a scatter plot.
How can I force the tooltip and markers to be enabled only for the normal data set?
Many thanks
formatter: Function
Callback function to format the text of the tooltip. Return false to disable tooltip for a specific point on series.
Reference:
http://api.highcharts.com/highcharts#tooltip.formatter
See shared tooltip formatter. It gives you better control over the tooltip.
http://api.highcharts.com/highcharts#tooltip
EDIT: I have added some code. See the custom tooltip formatter;
tooltip: {
formatter: function () {
if (this.series.name == "Male") {
return "<b>" + this.series.name + "</b><br>" + this.x + " cm, " + this.y + " kg";
} else return " ";
}
}
See the fiddle for example: http://jsfiddle.net/androdify/cweC6/
This solution is for keeping tooltips on all series, but only display one tooltip at a time corresponding to the point actually hovered over.
Look through the code for where it is specifying a variable by the name of hoverPoints and change it to this:
{hoverPoint:l,hoverSeries:b,hoverPoints:l?[l]:[]}
This is the code for Highstock, so if you are using vanilla Highcharts you may need to change variable names around a bit. To explain how this works, the default value for hoverpoints is an array of all points on that spot on the x axis. Changing it to an array containing the single point that you actually hovered over, the value of hoverPoint, causes highcharts to ignore the other hit points.
When styling a chart axis, a common style in publications is to include the unit or percentage sign only on the topmost label of the Y-axis. I am trying to figure out how to do this in Highcharts.
I know I can hard-code a number, like this:
yAxis: {
labels: {
formatter: function() {
if ( this.value == 12 ) {
return this.value + "%";
} else {
return this.value;
}
}
},
But this is not a very flexible solution.
Is there a way to test for the first (or nth) value displayed? Is there a way to get the index of a value within the formatter function?
2013 Update
This works in most circumstances:
if ( this.value == this.axis.getExtremes().max )
return this.value + '%';
else
return this.value;
However, it does not work if you have yAxis.endOnTick set to false—because in that case the maximum value of the axis is not the same as the highest label on the axis.
Is there a way to get that highest label from within the formatter function?
As far as I know, it isn't possible to find the 'nth' item on an axis, but first and last can be dome using the properties this.isFirst and this.isLast' in stead of checkingthis.value`
If you want to, you can also access the axis itself directly using this.axis, so you should be able to run whatever complex logic you want on the axis itself..
With 4.2.x version of highchart I have achieved it with following code
labels: {
formatter: function () {
if(this.isFirst)
return this.value + "%";
else
return this.value;
}
}
}
You could also add [%] to the name of the yAxis. Then you wouldn't have to tamper with the ticks.
You can draw at max value plotLine and after extremes are changed - remove and add new one). Then label for that plotLine you can set as '%' and move to the left side.
Another solution is to use axis title - set it to top and remove rotation.
The last solutions (or rather workaround) is to use second yAxis, and set there min and max(or tickPositions), and show only last label, and first hide.