ChartJS Scatter plot with JSON list variable not working - javascript

I want to plot scatter plots from a JSON variable (list of lists; in the format needed for Chart JS scatter plots) that I passed from Flask.
render_template('chart.html',data2 = data2)
The below code when I manually create datasets using jinja variable {{data2}} is working:
var chartData = {
datasets : [{
label: 'Cluster 1',
fill: false,
showLine: false,
lineTension: 0.1,
backgroundColor: "green",
borderColor: "black", // The main line color
borderCapStyle: 'square',
borderDash: [], // try [5, 15] for instance
borderDashOffset: 0.0,
borderJoinStyle: 'miter',
pointBorderColor: "green",
pointBackgroundColor: "green",
pointBorderWidth: 1,
pointHoverRadius: 8,
pointHoverBackgroundColor: "yellow",
pointHoverBorderColor: "brown",
pointHoverBorderWidth: 2,
pointRadius: 4,
pointHitRadius: 10,
// notice the gap in the data and the spanGaps: true
data :{{data2[0]}},
spanGaps: true,
},
{
label: 'Cluster 2',
fill: false,
showLine: false,
lineTension: 0.1,
backgroundColor: "blue",
borderColor: "black", // The main line color
borderCapStyle: 'square',
borderDash: [], // try [5, 15] for instance
borderDashOffset: 0.0,
borderJoinStyle: 'miter',
pointBorderColor: "blue",
pointBackgroundColor: "blue",
pointBorderWidth: 1,
pointHoverRadius: 8,
pointHoverBackgroundColor: "yellow",
pointHoverBorderColor: "brown",
pointHoverBorderWidth: 2,
pointRadius: 4,
pointHitRadius: 10,
// notice the gap in the data and the spanGaps: true
data :{{data2[1]}},
spanGaps: true,
},
{
label: 'Cluster 3',
fill: false,
showLine: false,
lineTension: 0.1,
backgroundColor: "red",
borderColor: "black", // The main line color
borderCapStyle: 'square',
borderDash: [], // try [5, 15] for instance
borderDashOffset: 0.0,
borderJoinStyle: 'miter',
pointBorderColor: "red",
pointBackgroundColor: "red",
pointBorderWidth: 1,
pointHoverRadius: 8,
pointHoverBackgroundColor: "yellow",
pointHoverBorderColor: "brown",
pointHoverBorderWidth: 2,
pointRadius: 4,
pointHitRadius: 10,
// notice the gap in the data and the spanGaps: true
data :{{data2[2]}},
spanGaps: true,
},.....so on
// get chart canvas
var holder = document.getElementById("myChart2");
var ctx = document.getElementById("myChart2").getContext("2d");
// create the chart using the chart canvas
var myChart = new Chart(ctx, {
type: 'scatter',
data: chartData,
options: {
scales: {
xAxes: [{
display: true,
ticks: {
beginAtZero: true,
autoSkip: true,
autoSkipPadding: 30,
stepSize: 500,
maxTicksLimit: 10
},
scaleLabel: {
display: true,
labelString: 'Days',
fontStyle: 'bold'
}
}],
yAxes: [{
display: true,
scaleLabel: {
display: true,
labelString: 'Oil Rate',
fontStyle: 'bold'
}
}]
}
}
});
But when I use tojson and use the same variable in a for loop its not working (Rendering a blank chart):
var ds = []
var d2 = {{data2|tojson}}
for (var j=0; j < {{o}}; j++){
ds.push ({
label: 'Cluster' +j,
fill: false,
showLine: false,
lineTension: 0.1,
backgroundColor: colorlist[j],
borderColor: colorlist[j], // The main line color
borderCapStyle: 'square',
borderDash: [], // try [5, 15] for instance
borderDashOffset: 0.0,
borderJoinStyle: 'miter',
pointBorderColor: "green",
pointBackgroundColor: "green",
pointBorderWidth: 1,
pointHoverRadius: 8,
pointHoverBackgroundColor: "yellow",
pointHoverBorderColor: "brown",
pointHoverBorderWidth: 2,
pointRadius: 4,
pointHitRadius: 10,
// notice the gap in the data and the spanGaps: true
data :d2[j],
spanGaps: true,
});
}
var chartData2 = {
datasets : ds
}
var holder = document.getElementById("myChart2");
var ctx = document.getElementById("myChart2").getContext("2d");
// create the chart using the chart canvas
var myChart2 = new Chart(ctx, {
type: 'scatter',
data: chartData2,
options: {
scales: {
xAxes: [{
display: true,
ticks: {
beginAtZero: true,
autoSkip: true,
autoSkipPadding: 30,
stepSize: 500,
maxTicksLimit: 10
},
scaleLabel: {
display: true,
labelString: 'Days',
fontStyle: 'bold'
}
}],
yAxes: [{
display: true,
scaleLabel: {
display: true,
labelString: 'Oil Rate',
fontStyle: 'bold'
}
}]
}
}
});
For more clarity, this is how my data2 was created for scatter chart js:
x2 = {}
y2 = {}
data = {}
for i in n:
x2[i] = list(df_no_anamolies['Days'[df_no_anamolies["clusters_oilvsDays"]==i])
y2[i] = list(df_no_anamolies['Oil_rate(stb/d)'[df_no_anamolies["clusters_oilvsDays"]==i])
T = []
for j,k in zip(x2[i],y2[i]):
T.append({'x': j, 'y': k})
data[i] = str(T).replace('\'', '')
dt2 = list(data.items())
data2 = []
for i in range(len(dt2)):
data2.append(dt2[i][1])
This how my data2 looks like:
['[{x: 429, y: 21862.782000000003}, {x: 430, y: 21769.1868}]',
'[{x: 431, y: 21752.5183}, {x: 432, y: 21406.0022}]',
'[{x: 433, y: 20823.7369},'[{x: 434, y: 21101.5033}]',
'[{x: 435, y: 22031.354}, {x: 434, y: 21101.5033}]'....]
Can someone help me with how to do this with a loop.


Your "Y" objects are Decimal objects and the JsonEnconder doesn't accept Decimal objects. I usually just create a subclass of the json.JSONEncoder.
class DecimalEncoder(json.JSONEncoder):
def _iterencode(self, o, markers=None):
if isinstance(o, decimal.Decimal):
return (str(o) for o in [o])
return super(DecimalEncoder, self)._iterencode(o, markers)
then you can use it as
json.dumps({'Y': decimal.Decimal('21769.1868')}, cls=DecimalEncoder)


I think you'll need to parse those json strings before passing them to chart.js
var chartData2 = {
datasets : [{label: 'Cluster 1',
fill: false,
showLine: false,
lineTension: 0.1,
backgroundColor: "green",
borderColor: "black",
borderCapStyle: 'square',
borderDash: [],
borderDashOffset: 0.0,
borderJoinStyle: 'miter',
pointBorderColor: "green",
pointBackgroundColor: "green",
pointBorderWidth: 1,
pointHoverRadius: 8,
pointHoverBackgroundColor: "yellow",
pointHoverBorderColor: "brown",
pointHoverBorderWidth: 2,
pointRadius: 4,
pointHitRadius: 10,
data : JSON.parse( {{ data[1] }} ),
spanGaps: true,
}]
}

Related

Sum of results filtered by month in a chart [LARAVEL]

I am currently trying to do a chart with chart.js, and I would like to get the total number of sales over a year in 1 month increments. I'm currently wondering how to break down the number of sales I make every month knowing that I have the "created_at" column for each order. I know how to do the total for each month with a foreach loop, but to cut out the sales and put the total in a table, I don't see how I could do it.
This is what my table looks like:
This is what my chart looks like:
moment().locale('fr');
var canvas = document.getElementById("bellegaiaChart");
var ctx = canvas.getContext('2d');
// Global Options:
Chart.defaults.global.defaultFontColor = 'black';
Chart.defaults.global.defaultFontSize = 16;
var data = {
labels: ["Jan", "Fev", "Mar", "Avr", "Mai", "Juin", "Jui", "Aoû", "Sep", "Oct", "Nov", "Dec"],
datasets: [{
label: "Ventes",
fill: false,
lineTension: 0.1,
backgroundColor: "rgba(225,0,0,0.4)",
borderColor: "red", // The main line color
borderCapStyle: 'square',
borderDash: [], // try [5, 15] for instance
borderDashOffset: 0.0,
borderJoinStyle: 'miter',
pointBorderColor: "black",
pointBackgroundColor: "white",
pointBorderWidth: 1,
pointHoverRadius: 8,
pointHoverBackgroundColor: "yellow",
pointHoverBorderColor: "brown",
pointHoverBorderWidth: 2,
pointRadius: 4,
pointHitRadius: 10,
// notice the gap in the data and the spanGaps: true
data: [65, 59, 80, 81, 56, 110, 40 ,60,55,30,78],
spanGaps: false,
}, {
label: "Nouveaux Clients",
fill: false,
lineTension: 0.1,
backgroundColor: "rgba(167,105,0,0.4)",
borderColor: "rgb(167, 105, 0)",
borderCapStyle: 'butt',
borderDash: [],
borderDashOffset: 0.0,
borderJoinStyle: 'miter',
pointBorderColor: "white",
pointBackgroundColor: "black",
pointBorderWidth: 1,
pointHoverRadius: 8,
pointHoverBackgroundColor: "brown",
pointHoverBorderColor: "yellow",
pointHoverBorderWidth: 2,
pointRadius: 4,
pointHitRadius: 10,
// notice the gap in the data and the spanGaps: false
data: [10, 20, 60, 95, 64, 78, 90,70,40,70,89, 73],
spanGaps: false,
}
]
};
// Notice the scaleLabel at the same level as Ticks
var options = {
scales: {
yAxes: [{
ticks: {
beginAtZero:true
},
scaleLabel: {
display: true,
labelString: 'Moola',
fontSize: 20
}
}]
}
};
// Chart declaration:
var myBarChart = new Chart(ctx, {
type: 'line',
data: data,
options: options
});
This chart is currently integrated in my blade view.
The goal would be to have a table containing all the sales totals per month (so 12 entries in the table) in order to be able to specify it in the data of my chart.

Chart JS - Grid colors and gradient fill not showing

I have the following chart:
var canvas = document.getElementById('chart');
var data = {
labels: ["Q1","Q2","Q3","Q4","Q5"],
datasets: [
{
label: "Your answers",
fill: false,
lineTension: 0.1,
backgroundColor: "rgba(75,192,192,0.4)",
borderColor: "rgba(75,192,192,1)",
borderCapStyle: 'butt',
borderDash: [],
borderDashOffset: 0.0,
borderJoinStyle: 'miter',
pointBorderColor: "rgba(75,192,192,1)",
pointBackgroundColor: "rgba(75,192,192,1)",
pointBorderWidth: 1,
pointHoverRadius: 5,
pointHoverBackgroundColor: "rgba(75,192,192,1)",
pointHoverBorderColor: "rgba(220,220,220,1)",
pointHoverBorderWidth: 2,
pointRadius: 5,
decimals : false,
pointHitRadius: 10,
data: [3,5,6,3,7],
stack: 4
},
{
label: "Average answers",
fill: false,
lineTension: 0.1,
borderColor: "rgba(79,104,241,1)",
borderCapStyle: 'butt',
borderDash: [],
borderDashOffset: 0.0,
borderJoinStyle: 'miter',
pointBorderColor: "rgba(75,192,192,1)",
pointBackgroundColor: "rgba(79,104,241,1)",
pointBorderWidth: 1,
pointHoverRadius: 5,
pointHoverBackgroundColor: "rgba(79,104,241,1)",
pointHoverBorderColor: "rgba(220,220,220,1)",
pointHoverBorderWidth: 2,
pointRadius: 5,
decimals : false,
pointHitRadius: 10,
data: [2,7,5,10,3],
stack: 5
},
{
label: "Your average",
pointStyle: 'line',
fill: false,
borderColor: "#ffffff",
borderCapStyle: 'round',
borderDash: [0.5,5],
borderDashOffset: 1,
lineTension: 0.1,
data: [5,5,5,5,5],
},
{
label: "Audit average",
pointStyle: 'line',
fill: false,
borderColor: "#ffffff",
borderCapStyle: 'round',
borderDash: [5,8],
borderDashOffset: 0.6,
lineTension: 0.1,
data: [7,7,7,7,7],
},
]
};
var option = {
plugins: {
filler: {
propagate: true
}
},
legend : {
display:false
},
showLines: true,
scales: {
yAxes: [{
gridLines: {
color: 'rgb(255, 255, 255)',
display: true,
},
scaleLabel: {
display: true,
labelString: 'Scores'
},
stacked: false,
ticks: {
beginAtZero: 0,
suggestedMin: 1,
suggestedMax: 10,
stepSize: 2,
userCallback: function(label, index, labels) {
// when the floored value is the same as the value we have a whole number
if (Math.floor(label) === label) {
return label;
}
},
}
}],
xAxes: [{
gridLines: {
color: 'rgb(255, 255, 255)',
display: true,
},
scaleLabel: {
display: true,
labelString: 'Questions'
},
}]
},
annotation: {
annotations: [
{
drawTime: "beforeDatasetsDraw",
type: "box",
id: "n",
xScaleID: "x-axis-0",
yScaleID: "y-axis-0",
xMin: "Q1",
xMax: "Q5",
yMin: 0,
yMax: 3.7,
backgroundColor: "rgba(26,26,26,0.6)",
borderColor: "rgba(26,26,26,0.6)",
borderWidth: 1,
},
{
drawTime: "beforeDatasetsDraw",
type: "box",
xScaleID: "x-axis-0",
yScaleID: "y-axis-0",
xMin: "Q1",
xMax: "Q5",
yMin: 3.7,
yMax: 7,
backgroundColor: 'rgba(88,88,88,0.6)',
borderColor: 'rgba(88,88,88,0.6)',
borderWidth: 1,
},
{
drawTime: "beforeDatasetsDraw",
type: "box",
xScaleID: "x-axis-0",
yScaleID: "y-axis-0",
xMin: "Q1",
xMax: "Q5",
yMin: 7,
yMax: 10,
backgroundColor: 'rgba(31,42,97,0.6)',
borderColor: 'rgba(88,88,88,0.6)',
borderWidth: 0,
}
]
}
};
var myLineChart = Chart.Line(canvas,{
data:data,
options: {
responsive: true,
maintainAspectRatio: false,
tooltips: {
mode: 'index'
},
scales: {
yAxes: [{
ticks: {
beginAtZero: true
}
}]
}
}
});
.wrap { background-color:#000; }
<script src="https://cdnjs.cloudflare.com/ajax/libs/Chart.js/2.5.0/Chart.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/chartjs-plugin-annotation/0.5.5/chartjs-plugin-annotation.js"></script>
<div class="wrap">
<canvas id="chart" width="400" height="250"></canvas>
</div>
I'm trying to achieve two things:
Change border and gridline colour to white.
Change the gradient fill.
For 1. I have the following code added to the x and y:
gridLines: {
color: 'rgb(255, 255, 255)',
display: true,
}
For 2, I have background colour defined under annotation: {
Why is neither of it working?
Here's a visual of what I'm trying to achieve:
Edit:
I have changed to the following:
var myLineChart = Chart.Line(document.getElementById('chart'), {
data: data,
options: options
});
With the above, the grids and background colors appear as I wanted (thanks to uminders answer). However, the label / key now is not there.
With the following:
var myLineChart = Chart.Line(document.getElementById('chart'), {
data: data,
options: {
responsive: true,
maintainAspectRatio: false
tooltips: {
mode: 'index'
}
}
});
With the above, the key now appears, but the gridlines and background colours do not.
Is there a middle ground I can reach here? I want both, the key and colors.

To show gridlines as expected, define a positive z-index of gridline layer as follows (see Grid Line Configuration).
gridLines: {
color: 'rgb(255, 255, 255)',
z: 2
},
To show gradient fill, use the previously defined options object (renamed from option) when you create the chart.
var myLineChart = Chart.Line(document.getElementById('chart'), {
data: data,
options: options
});
var data = {
labels: ["Q1", "Q2", "Q3", "Q4", "Q5"],
datasets: [{
label: "Your answers",
fill: false,
lineTension: 0.1,
backgroundColor: "rgba(75,192,192,0.4)",
borderColor: "rgba(75,192,192,1)",
borderCapStyle: 'butt',
borderDash: [],
borderDashOffset: 0.0,
borderJoinStyle: 'miter',
pointBorderColor: "rgba(75,192,192,1)",
pointBackgroundColor: "rgba(75,192,192,1)",
pointBorderWidth: 1,
pointHoverRadius: 5,
pointHoverBackgroundColor: "rgba(75,192,192,1)",
pointHoverBorderColor: "rgba(220,220,220,1)",
pointHoverBorderWidth: 2,
pointRadius: 5,
decimals: false,
pointHitRadius: 10,
data: [3, 5, 6, 3, 7],
stack: 4
},
{
label: "Average answers",
fill: false,
lineTension: 0.1,
borderColor: "rgba(79,104,241,1)",
borderCapStyle: 'butt',
borderDash: [],
borderDashOffset: 0.0,
borderJoinStyle: 'miter',
pointBorderColor: "rgba(75,192,192,1)",
pointBackgroundColor: "rgba(79,104,241,1)",
pointBorderWidth: 1,
pointHoverRadius: 5,
pointHoverBackgroundColor: "rgba(79,104,241,1)",
pointHoverBorderColor: "rgba(220,220,220,1)",
pointHoverBorderWidth: 2,
pointRadius: 5,
decimals: false,
pointHitRadius: 10,
data: [2, 7, 5, 10, 3],
stack: 5
},
{
label: "Your average",
pointStyle: 'line',
fill: false,
borderColor: "#ffffff",
borderCapStyle: 'round',
borderDash: [0.5, 5],
borderDashOffset: 1,
lineTension: 0.1,
data: [5, 5, 5, 5, 5],
},
{
label: "Audit average",
pointStyle: 'line',
fill: false,
borderColor: "#ffffff",
borderCapStyle: 'round',
borderDash: [5, 8],
borderDashOffset: 0.6,
lineTension: 0.1,
data: [7, 7, 7, 7, 7],
},
]
};
var options = {
plugins: {
filler: {
propagate: true
}
},
responsive: true,
maintainAspectRatio: false,
tooltips: {
mode: 'index'
},
showLines: true,
scales: {
yAxes: [{
gridLines: {
color: 'rgb(255, 255, 255)',
z: 2
},
scaleLabel: {
display: true,
labelString: 'Scores'
},
stacked: false,
ticks: {
beginAtZero: 0,
suggestedMin: 1,
suggestedMax: 10,
stepSize: 2,
userCallback: function(label, index, labels) {
// when the floored value is the same as the value we have a whole number
if (Math.floor(label) === label) {
return label;
}
},
}
}],
xAxes: [{
gridLines: {
color: 'rgb(255, 255, 255)',
z: 2
},
scaleLabel: {
display: true,
labelString: 'Questions'
},
}]
},
annotation: {
annotations: [
{
drawTime: "beforeDatasetsDraw",
type: "box",
id: "n",
xScaleID: "x-axis-0",
yScaleID: "y-axis-0",
xMin: "Q1",
xMax: "Q5",
yMin: 0,
yMax: 3.7,
backgroundColor: "rgba(26,26,26,0.6)",
borderColor: "rgba(26,26,26,0.6)",
borderWidth: 1,
},
{
drawTime: "beforeDatasetsDraw",
type: "box",
xScaleID: "x-axis-0",
yScaleID: "y-axis-0",
xMin: "Q1",
xMax: "Q5",
yMin: 3.7,
yMax: 7,
backgroundColor: 'rgba(88,88,88,0.6)',
borderColor: 'rgba(88,88,88,0.6)',
borderWidth: 1,
},
{
drawTime: "beforeDatasetsDraw",
type: "box",
xScaleID: "x-axis-0",
yScaleID: "y-axis-0",
xMin: "Q1",
xMax: "Q5",
yMin: 7,
yMax: 10,
backgroundColor: 'rgba(31,42,97,0.6)',
borderColor: 'rgba(88,88,88,0.6)',
borderWidth: 0
}
]
}
};
var myLineChart = Chart.Line(document.getElementById('chart'), {
data: data,
options: options
});
canvas { background-color:#000; }
<script src="https://cdnjs.cloudflare.com/ajax/libs/Chart.js/2.9.3/Chart.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/chartjs-plugin-annotation/0.5.7/chartjs-plugin-annotation.js"></script>
<canvas id="chart" width="400" height="250"></canvas>

Why don't you use var option variable in the declarations? for example:
var myLineChart = Chart.Line(canvas,{
data:data,
options: option
});

Chart.JS Multiline Chart with unknown numbers of Lines from JSON

I try do to a Multi - Linechart with chart.js. I have a json dataset from a database. The number of dataset can be different. Here is a example (x can be more) with JSON Data.
[{"name":"name1","jan":4067.5,"feb":1647,
"mrz":1375,"apr":10191,"mai":0,"jun":28679,"jul":59502},
{"name":"name2","jan":47548,"feb":63280.5,
"mrz":51640.26,"apr":75029,"mai":41137,"jun":89114.26,"jul":77332},
{"name":"name3","jan":38099,"feb":55023.5,
"mrz":62668,"apr":39482,"mai":44193.3,"jun":52826.5,"jul":77072},
{"name":"namex","jan":34930.5,"feb":36831.5,
"mrz":24391,"apr":35051,"mai":38038,"jun":12700,"jul":51080}]
I have abbreviated the example, in reality it is until December.
I try to do a chart with a line for every name. The X-axis should be the months of January to December and the Y-axis sales.
34/5000

From what I understand, your dataset will get dynamically updated.
You can just change your dataset then call the update() function.
For example:
First initialize your chart with all the data using:
var canvas = document.getElementById("barChart");
var ctx = canvas.getContext('2d');
var data = {
labels: ["Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"],
datasets: [{
label: "name 1",
fill: false,
lineTension: 0.1,
backgroundColor: "rgba(225,0,0,0.4)",
borderColor: "red",
borderCapStyle: 'square',
borderDash: [],
borderDashOffset: 0.0,
borderJoinStyle: 'miter',
pointBorderColor: "black",
pointBackgroundColor: "white",
pointBorderWidth: 1,
pointHoverRadius: 8,
pointHoverBackgroundColor: "yellow",
pointHoverBorderColor: "brown",
pointHoverBorderWidth: 2,
pointRadius: 4,
pointHitRadius: 10,
data: [65, 59, 80, 81, 56, 55, 40, ,60,55,30,78]
}, {
label: "name 2",
fill: true,
lineTension: 0.1,
backgroundColor: "rgba(167,105,0,0.4)",
borderColor: "rgb(167, 105, 0)",
borderCapStyle: 'butt',
borderDash: [],
borderDashOffset: 0.0,
borderJoinStyle: 'miter',
pointBorderColor: "white",
pointBackgroundColor: "black",
pointBorderWidth: 1,
pointHoverRadius: 8,
pointHoverBackgroundColor: "brown",
pointHoverBorderColor: "yellow",
pointHoverBorderWidth: 2,
pointRadius: 4,
pointHitRadius: 10,
data: [10, 20, 60, 95, 64, 78, 90,,70,40,70,89]
}
]
};
var options = {
scales: {
yAxes: [{
ticks: {
beginAtZero:true
},
scaleLabel: {
display: true,
labelString: 'Moola',
fontSize: 20
}
}]
}
};
// Chart declaration:
var myBarChart = new Chart(ctx, {
type: 'line',
data: data,
options: options
});
Then if you later want to update your data, you can just:
myBarChart.data.datasets = [{
label: "name 3",
fill: true,
lineTension: 0.1,
backgroundColor: "rgba(167,105,0,0.4)",
borderColor: "rgb(167, 105, 0)",
borderCapStyle: 'butt',
borderDash: [],
borderDashOffset: 0.0,
borderJoinStyle: 'miter',
pointBorderColor: "white",
pointBackgroundColor: "black",
pointBorderWidth: 1,
pointHoverRadius: 8,
pointHoverBackgroundColor: "brown",
pointHoverBorderColor: "yellow",
pointHoverBorderWidth: 2,
pointRadius: 4,
pointHitRadius: 10,
data: [10, 20, 60, 95, 64, 78, 90,,70,40,70,89]
},
...............
];
myBarChart.update();
Also, you will need to format your data in a way that can be used with the charts.
Format your data so that you can create a proper dataset.

Change legend style from bar to line chart.js 2.4.0

I am using chart.js(2.4.0) for graph and i need to change the legend style from bar to line I am unable to do that.
How can i change legend from bar to line.
Following is my code
renderChart(id, labels, label1, label2, data1, data2, borderDash = [], pointRadius = 3, backgroundColor = '#36a1eb') {
data2 = data2 || [];
const options = {
type: 'line',
data: {
labels: labels,
datasets: [{
fill: false,
lineTension: 0.1,
backgroundColor: backgroundColor,
borderColor: '#36a1eb',
lineColor: '#36a1eb',
strokeColor: '#36a1eb',
borderCapStyle: 'butt',
borderDash: borderDash,
borderDashOffset: 0.0,
borderJoinStyle: 'miter',
pointBorderColor: '#36a1eb',
pointBackgroundColor: '#36a1eb',
pointBorderWidth: 1,
pointHoverRadius: 5,
pointHoverBackgroundColor: '#36a1eb',
pointHoverBorderColor: '#36a1eb',
pointHoverBorderWidth: 2,
pointRadius: pointRadius,
pointHitRadius: 10,
label: label2,
data: data2,
borderWidth: 2
}
]
},
options: {
scales: {
yAxes: [{
ticks: {
reverse: false,
beginAtZero: false
},
scaleLabel: {
display: true,
labelString: 'Value'
}
}],
xAxes: [{
ticks: {
reverse: false,
beginAtZero: false
},
scaleLabel: {
display: true,
labelString: 'Date'
}
}],
}
}
};
How can i do this?
I searched all of the documentation of the chart.js but still unable to modify it to line.

The configuration options are available at
https://www.chartjs.org/docs/latest/configuration/legend.html#legend-label-configuration
Have you tried boxWidth or usePointStyle?

Chartjs Linechart label in wrong position

I'm using chartjs2 and I have 2 charts on a page. The first have a bar and a line chart. There the position of the label on the X axis are good.
But with chart 2, where I have 2 line charts the label are at the wrong position. I want to add some padding either for the labels or for the lines.
Here the numbers should exactly under the points, so I would preffer to push the linecharts to the right side, as it's on the first picture.
Update: Fiddle example
var ctx = document.getElementById("compare");
new Chart(ctx, {
type: 'bar',
data: {
labels: [1, 2, 3, 4],
datasets: [
{
type: 'line',
label: 'First',
data: [0, 0, 0, 0, 0],
fill: true,
lineTension: 0.1,
backgroundColor: "rgba(254, 241, 231, 0.6)",
borderColor: "#ff6600",
pointBackgroundColor: "#f76420",
pointBorderColor: "#f5c09e",
pointBorderWidth: 2,
pointHoverRadius: 5,
pointHoverBackgroundColor: "#f76420",
pointHoverBorderColor: "#f5c09e",
pointHoverBorderWidth: 2,
pointRadius: 4,
pointHitRadius: 10
},
{
type: 'line',
label: 'Second',
data: [0, 8, 12, 6, 0],
fill: true,
lineTension: 0.1,
backgroundColor: "rgba(224, 224, 224, 0.6)",
borderColor: "#e0e0e0",
pointBackgroundColor: "#e0e0e0",
pointBorderColor: "#f5c09e",
pointBorderWidth: 2,
pointHoverRadius: 5,
pointHoverBackgroundColor: "#f76420",
pointHoverBorderColor: "#f5c09e",
pointHoverBorderWidth: 2,
pointRadius: 4,
pointHitRadius: 10
}
]
},
options: {
legend: {
display: false
},
tooltips: {
mode: 'label'
},
scales: {
yAxes: [{
ticks: {
max: 13,
min: 0,
stepSize: 4,
fontColor: '#e0e0e0'
}
}],
xAxes: [{
gridLines: {
display: false,
drawBorder: false
}
}]
}
}
});

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