Hi I am using АpexChart but I have problem setting up xaxis. The picture below is from another chart, but I'm looking for the effect it has. Note the long straight line, this means there is no data for the specific period.
How do I set up a АpexChart so I can display similar data
var options = {
series: [{
name: "Level",
data: [30,45,50,60,70,91,125]
}],
chart: {
height: 350,
type: 'line',
zoom: {
enabled: true
}
},
dataLabels: {
enabled: true
},
stroke: {
curve: 'straight'
},
title: {
text: 'Battery',
align: 'left'
},
grid: {
row: {
colors: ['#f3f3f3', 'transparent'], // takes an array which will be repeated on columns
opacity: 0.5
},
},
xaxis: {
categories: [1991,1992,1993,1994,1995,1996,1997, 1998,1999]
}
};
var chart = new ApexCharts(document.querySelector("#chart"), options);
chart.render();
The chart we see on your screenshot has been made with Highcharts, right? I know that you can do something similar with amCharts or Chart.js. But this feature is not available in ApexCharts yet. With ApexCharts, you will get blanks (see demo) if you have null values in your data.
Take a look at this issue and this pull request on GitHub.
Comment of the library author (2019), from the issue:
This has been proposed, but not worked upon yet.
Comment of the library author (2021), from the PR:
Update: This PR doesn't solve the issue the way we wanted and doesn't cover multiple use-cases.
Please bear with us. There might be a new PR with a completely different implementation.
Related
Currently I am building a frontend application, that uses data like AirQuality and information about POIs. For displaying the rating of the single points I am using a radar chart with ChartJS (using it the First Time ever!).
I can already change the chart with input data, that is pushed to the chart after a button click. Another functionality I wanted to implement is the possibility to drag the endpoints of the radar chart to change the values.
I found the draggable plugin and I have tried to implement it, but it does not work like I thought it would.
This is the first time I am working with chartJS and I have found myself confused with the documentation about the plugin.
I am using plain JavaScript. No frameworks at all.
Here is the code for my chart:
var data = {
labels: ["Air", "POI", "Noise"],
datasets: [{
backgroundColor: "#50237f",
borderColor: "#50237f",
data: [33.3333333333, 33.3333333333, 33.3333333333],
label: 'Rating'
}]
};
var options = {
scale: {
ticks: {
min: 0,
max: 100,
stepSize: 25,
showLabelBackdrop: false
}
},
maintainAspectRatio: true,
spanGaps: false,
elements: {
line: {
tension: 0.000001
}
},
};
var ctx = document.getElementById("ratingChart");
var myChart = new Chart(ctx, {
type: 'radar',
data: data,
options: options,
config: {
plugins: {
// maybe set the plugin here? but how?
}
}
});
I would like to draw a horizontal target line showing threshold limits on a line, bar and pie chart using EChart.JS (https://ecomfe.github.io/echarts-doc/public/en/index.html).
There are other threads - "Chart.js - draw horizontal line" which detail how to do it with Chart.JS. Has anyone out there got particular experience on this with EChart?
Thanks in advance.
[Edit] Since Echarts v3 came up and was passed to the Apache Foundation, the documentation has been sclattered through different URLs, some options have gone away, some are not shown in all documentation resources, and so on. Links provided below have been updated (as of 24/02/2020) but might break again. I haven't fully tried v3 but provided code below should still work.[/Edit]
The option markLine is designed for that, see documentation here:
https://echarts.apache.org/en/option.html#series-line.markLine
Note that there are different uses for it, and different options to provide, depending on what you want to draw:
arbitrary line on the canvas (any size, any direction, any style)
lines matching data caracteristics (min, max, average)
horizontal/vertical lines
You have to use the attribute markLine.data in all cases, and description of specifics is described here:
https://echarts.apache.org/en/option.html#series-line.markLine.data
Here's how I go, with a line curve on a time serie. Note that I couldn't get, within markLine.data[0], yAxis to be enough to draw a horizontal line: xAxis must be specified too (start and end points).
xAxis: {
type: 'time',
},
yAxis: {
type: 'value'
},
series: [{
type: 'line',
xAxisIndex: 0,
yAxisIndex: 0,
data: [
[1509762600, 7.11376],
[1509832800, 7.54459],
[1509849000, 7.64559]
],
markLine: {
data: [
// 1st line we want to draw
[
// start point of the line
// we have to defined line attributes only here (not in the end point)
{
xAxis: 1509762600,
yAxis: 3,
symbol: 'none',
lineStyle: {
normal: {
color: "#00F"
}
},
label: {
normal: {
show: true,
position: 'end',
formatter: 'my label'
}
}
},
// end point of the line
{
xAxis: 1509849000,
yAxis: 3,
symbol: 'none'
}
]
]
}
}]
Here's a fiddle I found: https://jsfiddle.net/381510688/hff93ska/
Note that ECharts really like to display markLines with arrow symbols in the end of it, hence my use of symbol: 'none' in above code, to have just the line drawn.
Can someone please take a look at this example? It works when I use a smaller data set, but when I use a larger historical data set, it stops working and the data series does not render. Please help.
Small data set example - http://jsfiddle.net/Yrygy/250/
Large data set example (SERIES DOES NOT RENDER) - http://jsfiddle.net/Yrygy/249
var chart = new Highcharts.StockChart({
chart: {
renderTo: 'container',
height: 120
},
navigator: {
series: {
data: chartData
}
},
series: [{
data: [null],
markers: {
enabled:true
}
}]
});
You need to have your data sorted in ascending time order. Currently your "large" data set is not.
There is a couple of problems. First of all, as said #wergeld, you need to sort your data:
chartData.sort(function(a,b) { return a[0] - b[0]; });
Then the problem is with setting option for navigator:
navigator: {
series: [{
name: 'MSFT',
data: chartData
}]
},
When should be an object, not an array:
navigator: {
series: {
name: 'MSFT',
data: chartData
}
},
And the last one, do you really need to set xAxis.min/max ? Escpecially to values 2 and 4. when you have timestamps like
Working demo: http://jsfiddle.net/Yrygy/253/
Is it possible to dynamically add a new series to an existing jqPlot object?
I have a jqPlot object that uses the AJAX data renderer to retrieve 2 series. This part works works fine.
Based on user input (and several parameters), I would like to be able to dynamically add or remove additional series to the chart (while keeping the two original).
Is this possible? Is it possible without having to retrieve the unchanged data for the original two lines again?
Alternatively, if this is not possible, are there any recommendations for a different charting library that can do this?
Yes it is, I just found out how to do this, and I found your question, and there was no answer, so I will provide mine. Now, this is probably not the most elegant way to do it, but it works.
$(document).ready( function () {
DataSeriesToPlot = [[[x1_1,y1_1],[x1_2,y1_2]],[[x2_1,y2_1],[x2_2,y2_2]],
[[x3_1,y3_1], [x3_2,y3_2]]];
AxesOptions = {
xaxis: {min: xmin, max: xmax},
yaxis: {min: ymin}
};
PlotTitle = 'PlotTitle',
PlotSeriesDefaults = {
showMarker: false,
shadow: false,
rendererOptions: {
smooth: true
}
};
PlotLegend = {
show: true,
labels: ['label1','label2','label3']
};
PlotSeriesOptions = [
{
linePattern: 'dashed',
color: '#f80202',
},
{
linePattern: 'dashed',
color: '#f80202',
},
{
color: '#f80202',
}
];
PlotVar = $.jqplot('Plotdiv', DataSeriesToPlot,
{
axes: AxesOptions,
title: PlotTitle,
seriesDefaults: PlotSeriesDefaults,
series: PlotSeriesOptions,
legend: PlotLegend
});
AddToPlot();
});
function AddToPlot(){
$("Plotdiv").empty();
DataSeriesToPlot.push([[x4_1,y4_1],[x4_2,y4_2]]);
PlotLegend.labels.push('label4');
PlotSeriesOptions.push({
linePattern: 'dashed',
color: '#ff6600',
});
PlotVar = $.jqplot('Plotdiv', DataSeriesToPlot,
{
axes: AxesOptions,
title: PlotTitle,
seriesDefaults: PlotSeriesDefaults,
series: PlotSeriesOptions,
legend: PlotLegend
});
}
I'm trying to create a chart using highcharts that includes both a column series and a scatter series with a custom point marker. The series will contain slightly different sets of data, but will overlap for the most part and will always have the same x-axis values.
I've set it up, but the problem is that it's not lining up perfectly. Some of the scatter series' points are shifted one or two pixels to the left of the corresponding bar.
Any ideas about how to fix this?
{
chart: {
animation: false
},
xAxis: {
tickInterval: 1
},
series: [{
type: "column",
borderWidth: 0,
pointWidth: 20,
name: "col"
},
{
type: "scatter",
states: { hover: { enabled: false } },
marker: { symbol: 'url(symbol.png)' }
}]
}
And here's a screenshot of what's happening:
Indeed it looks like a bug, also with standard markers, so I've decided to report it to our developers https://github.com/highslide-software/highcharts.com/issues/1843