I'm successfully graphing a bunch of data points using Chartjs 2 with React, with a category Y-axis, but would like to label them with their category label. They're currently showing "undefined" as a tooltip value:
Here's what I've got right now (not working):
labels: this.state.graphData.eventWeekArray,
datasets: [
{
label: title,
labels: data,
fill: false,
lineTension: 0.1,
borderColor: colorArray()[counter],
borderCapStyle: 'butt',
borderJoinStyle: 'miter',
pointBorderColor: 'rgba(75,192,192,1)',
pointBackgroundColor: '#fff',
pointBorderWidth: 1,
pointHoverRadius: 6,
pointHoverBackgroundColor: 'rgba(75,192,192,1)',
pointHoverBorderColor: 'rgba(220,220,220,1)',
pointHoverBorderWidth: 3,
pointRadius: 1,
pointHitRadius: 1,
showLine: true,
steppedLine: true,
spanGaps: true,
data: data,
year: dataYear,
measurement: 'state'
}
]
Using options and scaleLabel doesn't work, either:
const options = {
legend: {
display: true
},
scales: {
xAxes: [
{
scaleLabel: {
display: true,
labelString: 'Weeks'
},
ticks: {
autoSkip: true,
autoSkipPadding: 20
}
}
],
yAxes: [
{
type: 'category',
labels: this.state.eventLabelArray
},
{
type: 'linear',
labels: this.state.brixLabelArray
}
]
}
};
Related
I am trying to create a chart that will look like this:
https://i.stack.imgur.com/9KpYO.png
but I am getting this:
https://i.stack.imgur.com/oA7Vm.png
This is my configuration:
{
chartOptions: {
chart: {
type: 'area',
height: 200,
toolbar: { show: false },
zoom: { enabled: false },
},
colors: ["#01c40e"],
grid: { show: false},
dataLabels: { enabled: false },
legend: { show: false },
stroke: {
curve: 'straight',
width: 2,
},
xaxis: {
type: 'numeric',
labels: {show: false},
axisBorder: {show:false},
axisTicks: {show:false},
},
yaxis: {
type: 'numeric',
labels: {show: false},
axisBorder: {show:false},
axisTicks: {show:false},
},
fill: {
type: "gradient",
gradient: {
shade: "light",
type: "vertical",
shadeIntensity: 0,
opacityFrom: 0.2,
opacityTo: 0.7,
stops: [0, 50, 80, 100]
}
},
tooltip: { enabled: false}
},
series: [{
name: 'Series A',
type: "area", // this is not in documentation but without it i get line, not area
data: [4852, 4840, 4845, 4859, 4862, 4852]
}]
}
Mostly it is about the fill configuration which fills the area too much and instead of fill being highest at the top, it is at the bottom, which makes the gradient inverse of what I need.
try swapping the values for opacityFrom and opacityTo,
and removing the option for stops
fill: {
type: "gradient",
gradient: {
shade: "light",
type: "vertical",
shadeIntensity: 0,
opacityFrom: 0.7,
opacityTo: 0.2
}
},
see following working snippet...
$(document).ready(function() {
var chart = new ApexCharts(
document.getElementById('chart'),
{
chart: {
type: 'area',
height: 200,
toolbar: { show: false },
zoom: { enabled: false },
},
colors: ["#01c40e"],
grid: { show: false},
dataLabels: { enabled: false },
legend: { show: false },
stroke: {
curve: 'straight',
width: 2,
},
xaxis: {
type: 'numeric',
labels: {show: false},
axisBorder: {show:false},
axisTicks: {show:false},
},
yaxis: {
type: 'numeric',
labels: {show: false},
axisBorder: {show:false},
axisTicks: {show:false},
},
fill: {
type: "gradient",
gradient: {
shade: "light",
type: "vertical",
shadeIntensity: 0,
opacityFrom: 0.7,
opacityTo: 0.2
}
},
tooltip: { enabled: false},
series: [{
name: 'Series A',
type: "area", // this is not in documentation but without it i get line, not area
data: [4852, 4840, 4845, 4859, 4862, 4852]
}]
}
);
chart.render();
});
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<script src="https://cdn.jsdelivr.net/npm/apexcharts"></script>
<div id="chart"></div>
I'm trying to get chartjs to show a specific label next to each point, for example in this script it should display "TRALALA" in the label as well as mouse hover, but instead it shows the coordinates.
How to have the specific label instead ?
https://jsfiddle.net/z0eLygwx/
thanks
var valuedata = [{
x: 3,
y: 5
}];
var valuelabel = ['TRALALA'];
var chartData = {
labels: valuelabel,
datasets: [{
label: 'Distance',
borderColor: '#2196f3', // Add custom color border
backgroundColor: '#2196f3', // Add custom color background (Points and Fill)
data: valuedata,
pointRadius: 10,
pointHoverRadius: 12
}]
};
var myBarChart = new Chart(document.getElementById("myChart1"), {
type: 'scatter',
data: {
labels: valuelabel,
datasets: [{
label: 'Distance',
borderColor: '#2196f3', // Add custom color border
backgroundColor: '#2196f3', // Add custom color background (Points and Fill)
data: valuedata,
pointRadius: 10,
pointHoverRadius: 12
}]
},
options: {
legend: {
display: true
},
title: {
display: true,
text: 'Distance of JDPT kanji compared to the equivalent JLPT level'
},
scales: {
yAxes: [{
type: 'logarithmic',
display: true,
scaleLabel: {
display: true,
labelString: 'Count',
fontSize: 16
}
}],
xAxes: [{
type: 'linear',
position: 'bottom',
display: true,
scaleLabel: {
display: true,
labelString: 'Distance',
fontSize: 16
},
gridLines: {
display: true
}
}]
},
plugins: {
datalabels: {
color: '#d6621e',
align: 'right',
offset: 16,
font: {
weight: 'bold'
}
}
}
}
});
myBarChart.update();
Ok I got it with
formatter: function(value, context) {
context.chart.data.labels[context.dataIndex];
}
For example
var myBarChart = new Chart(document.getElementById("bar-chart"), {
type: 'line',
data: {
labels: ['a', 'b'],
datasets: [{
data: [10, 20]
}]
},
options: {
plugins: {
datalabels: {
formatter: function(value, context) {
return context.chart.data.labels[context.dataIndex];
}
}
}
}
});
I am trying to create a chart with chart.js and i am using this plugin for showing some labels. But when most value on top, it not showing. Check first value (5), it not showing. Is any way to show it?
I tried padding for <canvas> but not work.
var ver = document.getElementById("chart").getContext('2d');
var chart = new Chart(ver, {
type: 'bar',
data: {
labels: ['Val1', 'Val2', 'Val3', 'Val4'],
datasets: [{
label: "Value",
borderColor: "#fff",
backgroundColor: "rgba(248,66,113,.85)",
hoverBackgroundColor: "#f84271",
data: [5,3,1,2]
}]
},
options: {
legend: {
display: false,
},
tooltips: {
backgroundColor: 'rgba(47, 49, 66, 0.8)',
titleFontSize: 13,
titleFontColor: '#fff',
caretSize: 0,
cornerRadius: 4,
xPadding: 10,
displayColors: false,
yPadding: 10
},
animation: {
"duration": "1000"
},
scales: {
xAxes: [{
stacked: false,
gridLines: {
drawBorder: true,
display: true
},
ticks: {
display: true
}
}],
yAxes: [{
stacked: false,
gridLines: {
drawBorder: true,
display: true
},
ticks: {
display: true
}
}]
},
plugins: {
labels: {
render: 'value',
}
},
}
});
<script type="text/javascript" src="https://cdn.jsdelivr.net/npm/chart.js"></script>
<script type="text/javascript" src="https://cdn.jsdelivr.net/gh/emn178/chartjs-plugin-labels/src/chartjs-plugin-labels.js"></script>
<canvas id="chart"></canvas>
Also fiddle here: https://jsfiddle.net/9o84ucny/
https://www.chartjs.org/docs/latest/configuration/layout.html
Use the layout property to options object:
layout: {
padding: {
top: 20
}
}
chart var should be like that:
var chart = new Chart(ver, {
type: 'bar',
data: {
labels: ['Val1', 'Val2', 'Val3', 'Val4'],
datasets: [{
label: "Value",
borderColor: "#fff",
backgroundColor: "rgba(248,66,113,.85)",
hoverBackgroundColor: "#f84271",
data: [5,10,1,2]
}]
},
options: {
layout: {
padding: {
top: 20
}
},
legend: {
display: false,
},
tooltips: {
backgroundColor: 'rgba(47, 49, 66, 0.8)',
titleFontSize: 13,
titleFontColor: '#fff',
caretSize: 0,
cornerRadius: 4,
xPadding: 10,
displayColors: false,
yPadding: 10
},
animation: {
"duration": "1000"
},
scales: {
xAxes: [{
stacked: false,
gridLines: {
drawBorder: true,
display: true
},
ticks: {
display: true
}
}],
yAxes: [{
stacked: false,
gridLines: {
drawBorder: true,
display: true
},
ticks: {
display: true
}
}]
},
plugins: {
labels: {
render: 'value',
}
},
}
});
It also show clear when you use title display true put this inside option
options: {
plugins: {
labels: {
render: 'value',
}
},
title: {
display: true,
},
scales: {
yAxes: [{
ticks: {
beginAtZero: true,
callback: function (value) { if (value % 1 === 0) { return value; } }
}
}]
}
}
So I have a chart.js chart with two series. One is a bar chart and the other is a line graph.
S1 = 71,166,2,6,8
S2 = 6,2,4,8,5
When I plot them, they both appear on their own scales which makes the bar and line graphs kinda pointless.
I need a way to plot both charts on the same scale.
Is there a way to do this within chart.js? If not, how would you do it?
thanks.
var barChartData = {
labels: dataLabels,
datasets: [{
type: 'bar',
label: "Actual",
data: dataActual,
fill: false,
backgroundColor: '#71B37C',
borderColor: '#71B37C',
hoverBackgroundColor: '#71B37C',
hoverBorderColor: '#71B37C',
yAxisID: 'y-axis-2'
}, {
label: "Maximum",
type:'line',
data: dataMaximum,
fill: false,
borderColor: '#EC932F',
backgroundColor: '#EC932F',
pointBorderColor: '#EC932F',
pointBackgroundColor: '#EC932F',
pointHoverBackgroundColor: '#EC932F',
pointHoverBorderColor: '#EC932F',
yAxisID: 'y-axis-1'
} ]
};
$(function () {
if (theChart !== undefined) {
theChart.destroy();
}
var ctxActualVsMax = document.getElementById("myChart2").getContext("2d");
theChart = new Chart(ctxActualVsMax, {
type: 'bar',
data: barChartData,
options: {
responsive: true,
tooltips: {
mode: 'label'
},
elements: {
line: {
fill: false
}
},
scales: {
xAxes: [{
display: true,
gridLines: {
display: false
},
labels: {
show: true,
}
}],
yAxes: [{
type: "linear",
display: true,
position: "left",
id: "y-axis-1",
gridLines:{
display: false
},
labels: {
show:true,
}
}, {
type: "linear",
display: false,
position: "right",
id: "y-axis-2",
gridLines:{
display: false
},
labels: {
show:true,
}
}]
}
}
});
});
In your code you have specified your two datasets to use different yAxisId's. Just set them both to the same, you can also remove the unused yAxes object from the options
fiddle
I'm using HighCharts to display charts on my site.
What I'd like to achieve is just a line chart with (zoomable) Date-Time X-Axis and numbers in Y-Axis.
But the result is messed up:
I load data by an ajax call, create an array and use chart.series[0].setData(chartData); to set the chart's data. Below is a sample for chartData:
[[1343071800000, 17], [1343158200000, 171], [1343244600000, 291], [1343075400000, 18],
[1343161800000, 74], [1343248200000, 293], [1343165400000, 183], [1343251800000, 296]]
Also, I use DotNetHighCharts since I'm using ASP.NET MVC 3, but the generated javascript to create the chart is as follows:
chart = new Highcharts.Chart({
chart: { renderTo:'chart_container' },
legend: { align: 'left', borderWidth: 0, floating: true, layout: 'horizontal', verticalAlign: 'top', y: 20 },
plotOptions: { series: { cursor: 'pointer', marker: { lineWidth: 1 }, point: { events: { click: function() { alert(Highcharts.dateFormat('%A, %b %e, %Y', this.x) +': '+ this.y +' visits'); } } } } },
subtitle: { text: 'Source: Google Analytics' },
title: { text: 'Daily visits at www.highcharts.com' },
tooltip: { crosshairs: true, shared: true },
xAxis: { gridLineWidth: 1, labels: { align: 'left', x: 3, y: -3 }, tickInterval: 604800000, tickWidth: 0, type: 'datetime' },
yAxis: [{ labels: { align: 'left', x: 3, y: 16, formatter: function() { return Highcharts.numberFormat(this.value, 0); } }, showFirstLabel: false, title: { text: '' } }, { gridLineWidth: 0, labels: { align: 'right', x: -3, y: 16, formatter: function() { return Highcharts.numberFormat(this.value, 0); } }, linkedTo: 0, opposite: true, showFirstLabel: false, title: { text: '' } }],
series: [{ name: 'All visits' }]
Your dataset is not in chronological order. So the charting system is joining all the points as best it can.
For time-based series it is always best to sort your time from earliest to latest.