I have line chart with time axe. I need to limit min zoom on my time interval, to be able zoom in and not zoom out range.
zoom: {
enabled: true,
// drag: true,
mode: 'x',
rangeMin: {
// Format of min zoom range depends on scale type
x: this.buildDataets(val)[0]['data'][0]
},
rangeMax: {
// Format of max zoom range depends on scale type
x: this.buildDataets(val)[0]['data'][4]
},
},
I tryed to get my first and last date to range zoom but it doesn't work.
Related
I am using chartjs 2.9.3. I want to have linear scale for x axis for bar plots. It should work just like any linear scale of line plots representing negative, decimal, positive values.
I have managed to create almost similar scale here using this options.
scales: {
xAxes: [
{
type: "time",
time: {
parser: "Y",
unit: "year",
displayFormats: {
year: "Y"
}
},
}
]
},
But it is not working for decimal values, when dataset has negative x values, it is just rounding off to integer and placing the bar at that position.
How can represent decimal values as well?
Chartjs >=3.0.0 has introduced linear scale for bar plots. But this version has some other bugs in it so I am stuck with 2.9.3 version
I don't recommend to change the axis type to time, as this will introduce several other issues given that there are not "fractional times". And adding support for it is not that easy.
The best bet is to create your own labels with a custom function. For example:
const f = () => {
let a = [];
for (let n = -30; n <= 30; n++) {
a.push(n / 100 + "");
}
return a;
};
To generate from -3.00 to +3.00 (zeros representing decimal places). The bigger the numbers 30 and 100 the bigger the "resolution" of your linear scale.
Demo: https://codesandbox.io/s/react-chartjs-2-example-forked-26bbx?file=/src/index.js
I want to color yaxis from value x to y with some color,
I used splitArea but is no use to me because is a splitArea is a repeater, repeats color based on given interval.
I want to obtain something similar to Chart.js:
Acceptable Range Highlighting of Background in Chart.js 2.0
echart
yAxis: {
splitArea:{
show:true,
areaStyle:{
color:["rgba(255,0,0,0.7)",'yellow','green','green','green']
}
}
},
I have a ECharts line chart where, based on some condition, the series can or can't have the markline. The problem is that, if the actual maximum yaxis value is less then a markline y value, not all the markline will be shown.
I tried to set manually the min/max of my yaxis but nothing changes.
This is how the axis conditions are defined in the option:
axis:[
{
scale: true
}],
xAxis: [{
type: "time"
}],
yAxis: [{
type: "value",
axisLabel: {
formatter: "{value} ° C"
},
scale: true
}]
and this is how I set the min/max yaxis values:
termoLineCharts[index].yAxis.min = minYvalue - 15;
termoLineCharts[index].yAxis.max = maxYValue + 15;
This is the solution: the yaxis option is an array, so in order to set the min and max value I had to do this
optionLineCharts[index].yAxis[0].min = minYvalue;
optionLineCharts[index].yAxis[0].max = maxYValue;
I have some info which is in this format (speed, frequency, date). What happens is that I need to plot this chart with speed x frequency, but I want to allow the users to use the navigation filtering by the date, which is not appearing on the chart.
Also, I have some info which is not built dynamically, which is the limits of speed x frequency. This info will be fixed as reference points on the plot. So, when I filter the plot info (not the limits), it must always display these limit plots.
You can have an idea by this chart, the area plots show the limits for the points (speed, frequency). Then, I would add points of speed x frequency (x date), and filter then by date.
Can you guys give me some advice on this?
here is a JSFIDDLE
JSFIDDLE
data: [
[0, 20, here is a date], [10, 20,here is a date],
[50, 39.9994, here is a date], [100,49.7494, here is a date]
],
Guys, notice that every element of the array in the series has 3 elements [a, b, c], suppose the third one (c) is a DATE and not a random number as it is right now. I want to be able to use the commented the navigator code to filter this series by this C element, which doesn't in fact appear on the chart you see, it is a hidden element, just to filter the data.
There will be a little tricky, if you want to have a navigator in the same chart. Navigator works only with datetime data and it must be connected with the axis from the main chart.
So, you have data in that format:
var points = [
[5, 9, Date.UTC(2016, 1, 0)],
[65, 6, Date.UTC(2016, 1, 1)],
...
You need two x axes - one which represents the data and the other which is connected to the navigator. The second axis must be visible to work with the navigator and must be connected with the datetime data.
So now, except two x axes, you need two series - one with the actual data, and the other consists of [date, y] values from the first series. The additional data will be visible in the navigator - note, that in the navigator you cannot use scatter series - so it will be converted to line series - to happen it without errors, your data should be sorted by date.
series: [{
id: 'main-series',
data: points.map(function(point) {
return [point[0], point[1], point[2], point[1]]
}),
showInNavigator: false,
xAxis: 1,
keys: ['x', 'y', 'date', 'holdY'] //holdY is for easier hiding points
}, {
xAxis: 0,
data: points.map(function(point) {
return [point[2], point[1]];
}),
showInNavigator: true,
enableMouseTracking: false,
color: 'transparent',
showInLegend: false
}],
xAxis: [{
minRange: 1000 * 3600 * 24,
type: 'datetime',
tickLength: 0,
tickLength: 0,
labels: {
enabled: false
},
}, {
type: 'linear'
}],
The last thing you need a callback which will hide/show points after the extremes in the navigator are set. Hiding/showing depends on the third point's property which is date. There is no directly API to hide/show specific points (except pie), but it can be achieved by setting point's value to null (that is why I preserved the real y in holdY).
events: {
afterSetExtremes: function(e) {
var points = this.chart.get('main-series').points;
points.forEach(function(point) {
point.update({
y: e.min <= point.date && point.date <= e.max ? point.holdY : null
}, false, false);
});
this.chart.redraw();
}
}
example: https://jsfiddle.net/3wuwdonn/1/
I would consider using a navigator as a separate chart, then you wouldn't need the second x axis and series in the main chart and you wouldn't need to make them look invisible.
example with a navigator only chart here: http://jsfiddle.net/f7Y9p/
If I have a data like this:
data: [0,0,0,0,0,0,0,0,0,0,0,0,0]
this serie starts on the middle but I want what starts really close than the bottom line and not in the middle.Please take a look in this jsfidle http://jsfiddle.net/gh/get/jquery/1.7.2/highslide-software/highcharts.com/tree/master/samples/highcharts/xaxis/tickwidth/ but change data by my example data (data: [0,0,0,0,0,0,0,0,0,0,0,0,0]), I test with min but in this scenario with all values in 0 did not work.
Thanks
I solve with min: 0,minRange: 1 in xAxis
I would do this simply by setting the yAxis min and max.
Example:
http://jsfiddle.net/jlbriggs/bKr74/1/
You can move xAxis down using offset property (offset: Number; The distance in pixels from the plot area to the axis line.):
xAxis: {
tickWidth: 10,
offset: -155
},
See example at jsfiddle