When I have a chart over several months, the interval is set to include the first of the month making intervals uneven and causing labels to overlap. Is this the expected behavior? Is there a way to disable this?
example
Here is an example based off one of echarts examples.
option = {
xAxis: {
type: 'time',
},
yAxis: {
type: 'value',
},
series: [
{
type: 'line',
symbol: 'none',
lineStyle: {
color: '#5470C6',
width: 5
},
data: [
['2019-08-17', 200],
['2019-10-10', 200],
['2019-10-11', 560],
['2019-10-12', 750],
['2019-10-13', 580],
['2019-10-14', 250],
['2019-10-15', 300],
['2019-10-16', 450],
['2019-10-17', 300],
['2019-11-15', 100]
]
}
]
};
If you want even intervals, you can instruct echarts to treat the dates as discrete values by changing the configuration of the axis:
xAxis: {
type: 'category',
}
Related
I have 7 days x axis and I need to split it in two different weeks with interval. When I use method for interval it set interval before first bar only. Here is example
[option = {
xAxis: [
{
type: 'category',
data: ['Sat', 'Sun', 'Mon', 'Tue', 'Wed', 'Thu', 'Fri'],
axisTick: {
interval: (index, value) => {
return ['Mon'].indexOf(value) >= 0;
},
inside: true,
length: 500
}
}
],
yAxis: {
type: 'value',
show: false
},
series: [
{
data: [120, 200, 150, 80, 70, 110, 130],
type: 'bar'
}
]
};]
https://codepen.io/Mykhailo-codepen/pen/gOKzYJj
How I need to write method to set interval before Monday only if Monday not the first day in x axis?
This was a bug. It should be fixed already
https://github.com/apache/echarts/issues/17967#issuecomment-1327987569
echarts: bar chart bars are located left and right of the value on the category axis:
How to tell echarts to start the bar with the value on the category axis? Like this:
To clarify the problem, here ist another example. This is a chart of the hourly sum of precipitation. Every bar should show the sum from the bottom to the top of the hour, the data values are conencted to every bottom of the hour.
as you can see, the bars are not starting at 8:00, they are starting at 7:30.
Data: (timestamps are shown in CET)
series: [
{
name: "Niederschlag",
type: "bar",
data: [[1608534000000, 3], [1608537600000, 5], [1608541200000, 2], [1608544800000, 0], [1608548400000, 1] ],
barWidth: '100%'
}
]
It should look like this:
Start point of bar here doesn't matter, you need align labels to left: https://echarts.apache.org/en/option.html#series-bar.label.align
you need a hidden xAxis like below:
option = {
xAxis: [{
type: 'category',
data: [0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23],
show: false
}, {
type: 'category',
data: [0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24],
boundaryGap: false,
axisTick: { alignWithLabel: true },
position: 'bottom'
}],
yAxis: {
type: 'value'
},
series: [{
data: [120, 200, 150, 80, 70, 110, 130,120,210,110,210],
type: 'bar',
barCategoryGap:'20%',
itemStyle: {
},
xAxisIndex: 0,
backgroundStyle: {
color: 'rgba(220, 220, 220, 0.8)'
}
}]
};
You have not provided the complete chart config, so I recommend using this one. Also pay attention on method useUTC and you need to know that "By default, echarts uses local timezone to formate time labels"
So I see this state of Chart by you data with offset -180:
var myChart = echarts.init(document.getElementById('chart'));
var chartData = [
[1608534000000, 3],
[1608537600000, 5],
[1608541200000, 2],
[1608544800000, 0],
[1608548400000, 1],
];
var option = {
tooltip: {},
xAxis: {
type: 'time',
data: ['00:00', '01:00', '02:00', '03:00', '04:00', '05:00', '06:00', '07:00', '08:00', '09:00', '10:00', '11:00', '12:00', '13:00', '14:00', '15:00', '16:00', '17:00', '18:00', '19:00', '20:00', '21:00', '22:00', '23:00'],
splitNumber: 24,
},
yAxis: {
type: 'value'
},
series: [{
name: "Niederschlag",
type: "bar",
data: chartData,
barWidth: '100%',
}],
useUTC: false,
};
myChart.setOption(option);
<script src="https://cdn.jsdelivr.net/npm/echarts#4.9.0/dist/echarts.min.js"></script>
<div id="chart" style="width: 1024px;height:400px;"></div>
I noticed that using
option = {
xAxis: {
type: 'category',
},
yAxis: {
type: 'value'
},
series: [ {
type: 'bar',
data: [
{ name: 'Sun', value: 50 },
{ name: 'Sun', value: 80 },
{ name: 'Mon', value: 100 }
]
}]
}
There are two bars with category as 'Sun'. But if I use
option = {
xAxis: {
type: 'category',
},
yAxis: {
type: 'value'
},
series: [{
type: 'bar',
data: [
['Sun',50],
['Sun',80],
['Mon',100]
]
}]
}
I see only one bar for 'Sun' with both data elements overlapping. Why does it work with array of objects differently? Also, if instead of using inline data, if I use dataset, then both array of arrays and array of objects behave the same where there is only one bar with overlap.
The reason I am looking for clarity on this is, I have a visualMap with a different attribute for color which makes the data repeat. I am trying to figure out if I need to create separate series or use the same series.
In general is bad idea to naming data points the same name. Strange that the data in the first case did not merge... If you need make the group then in the Echarts it's named stack. For the stack you can use the same name and it will be joined into one group.
VisualMap usually the global option and affects all series but you can limit with seriesIndex.
var myChart = echarts.init(document.getElementById('main'));
var option = {
xAxis: {
data: ["Cat1", "Cat2", "Cat3", "Cat4", "Cat5", "Cat6"]
},
visualMap: {
type: 'continuous',
range: [0, 70],
seriesIndex: 2,
color: ['green', 'blue', 'red'],
},
yAxis: {},
series: [{
name: 'Series1',
stack: 'group1',
type: 'bar',
data: [5, 20, 36, 10, 10, 20],
color: 'lightgray'
}, {
name: 'Series2',
stack: 'group1',
type: 'bar',
data: [5, 20, 36, 10, 10, 20],
color: 'gray'
}, {
name: 'Series3',
stack: 'group2',
type: 'bar',
data: [50, 20, 70, 10, 60, 40],
}]
};
myChart.setOption(option);
<script src="https://cdn.jsdelivr.net/npm/echarts#4.9.0/dist/echarts.min.js"></script>
<div id="main" style="width: 600px;height:400px;"></div>
I have a combined BarLineChart. Is there a possibility to add a label near the line (in this case how much the sales increased from 2015 to 2016) ?
I hope there is some way
This is what i have so far
I want this
Thanks
The easiest way to do this is to use the chartjs-plugin-annotation plugin provided by the same team that provides chart.js.
You can use the plugin to draw arbitrary lines or boxes on your chart that can also contain a label. Unfortunately, the plugin does not yet support point annotations, so you have to use a little hack to enable the label to display but not the line or box.
Here is an example chart that uses the plugin to draw a horizontal white line at a specific Y value (white is used so that it blends in with the chart background and becomes invisible). The line is configured to also have a label. The end result is a text annotation on the chart with no visible line.
var ctx = document.getElementById("myChart");
var myChart = new Chart(ctx, {
type: 'bar',
data: {
labels: ['Jan 21st', 'Feb 21st'],
datasets: [{
type: 'line',
label: 'B',
data: [10, 25],
fill: false,
borderWidth: 3,
borderColor: chartColors.orange,
lineTension: 0,
}, {
type: 'bar',
label: 'A',
backgroundColor: chartColors.blue,
data: [10, 25],
}]
},
options: {
scales: {
yAxes: [{
ticks: {
beginAtZero: true
}
}],
xAxes: [{
ticks: {
min: 'Jan 21st',
max: 'Apr 21st',
}
}],
},
annotation: {
annotations: [{
type: 'line',
mode: 'horizontal',
scaleID: 'y-axis-0',
value: 18,
borderColor: 'white',
borderWidth: 0,
label: {
xAdjust: -50,
fontSize: 16,
fontColor: 'black',
backgroundColor: 'white',
content: "+20%",
enabled: true
}
}],
drawTime: 'beforeDatasetsDraw'
}
}
});
You can see it in action at this codepen.
One final note, if you include the plugin in your app and you also use charts that don't use scales (e.g. pie/doughnut) then you will get an error. This is a known issue and has been logged here.
The workaround is to add this to your pie/doughnut chart config (or it might be easier to add it to the pie/doughnut global default config).
scales:{
yAxes: [],
xAxes: []
},
I've got a working combination chart. Line + columns.
The line is at the bottom of the chart because the numbers are low (between 5 - 10%). The columns' numbers are around 80% so they're up to the top of the chart. This is normal behavior.
I know in Excel you can shift or offset this line to the top of the chart so that it sits on top of the columns... Is this possible with Highcharts? How do you do this offset in Highcharts? I looked everywhere in the docs but can't find a solution...
thanks in advance,
Bart
You can use second yAxis, so you will be able to set extremes, which will work as your offset, see: http://jsfiddle.net/3bQne/921/
var chart = new Highcharts.Chart({
chart: {
renderTo: 'container'
},
xAxis: {
categories: ['01/02/2012', '01/03/2012', '01/04/2012', '01/05/2012', '01/06/2012', '01/07/2012']
},
yAxis: [{
// default options
}, {
opposite: true,
min: 0,
max: 5
}],
series: [{
type: 'column',
data: [29.9, 71.5, 106.4, 129.2, 144.0, 176.0]
}, {
type: 'line',
data: [4, 4, 4, 4, 4, 4],
yAxis: 1
}]
});