Chart.js will plot two json datasets in a line chart
I am trying to figure out how to draw labels in the correct places using Chart.js
var json = {
"competition one": [
{
"date": "2015-05-20",
"position": 37
},
{
"date": "2015-05-21",
"position": 22
}
],
"competition two": [
{
"date": "2015-05-20",
"position": 29
},
{
"date": "2015-05-21",
"position": 19
}
]
}
How can I label the places I want? With dates going to the correct labels so they don't repeat themselves?
Specifically, I am trying to get "competition one"
in label
array dataset
( label: "competition one"
)
I need it to resemble the following data structure that Chart.js requires?
var data = {
labels: ["2015-05-20", "2015-05-21"],
datasets: [
{
label: "competition one",
data: [37, 22]
},
{
label: "Competition two",
data: [29, 19]
}
]
};
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1 answer
As mentioned in the comments, you can get the property names like:
var json = {
"competition one": [
{
"date": "2015-05-20",
"position": 37
},
{
"date": "2015-05-21",
"position": 22
}
],
"competition two": [
{
"date": "2015-05-20",
"position": 29
},
{
"date": "2015-05-21",
"position": 19
}
]
}
var keys = Object.keys(json);
for (var i = 0; i < keys.length; i++)
{
var key = keys[i];
//"competition one", "competition two", etc
console.log(key);
}
Fiddle
you just need to manipulate those values into the desired object structure.
var keys = Object.keys(json);
//set up our object containing an array called datasets
var data = {datasets:[]};
for (var i = 0; i < keys.length; i++)
{
var key = keys[i];
//push the key into the dataset array as an object {}
data.datasets.push({label:key, data:...});
}
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