Chart.js 散点图的点格式数据
Chart.js point format data for a scatter plot
Chart.js 散点图只接受点格式 (x, y) 的数据。我正在尝试使用名为 meds.json 的文件中有关药物的信息来填充数据点
更具体地说,x 将是药物最后一次填充日期的月份,y 将是剂量。
如何从 meds.json 文件中获取所有这些数据并将其插入到数据中以创建散点图的点?
如果我尝试获取所有日期并将它们存储在一个数组中,并将所有剂量值存储在另一个数组中,我该如何使用这些数组来填充点数据?
这是使用 Chart.js 制作散点图的方法,我正在尝试填充数据 'data' 下的 x、y 点:
// charts.js
var scatterChart = new Chart(ctx, {
type: 'scatter',
data: {
datasets: [{
label: 'Scatter Dataset',
data: [{
// x = month, y = dose
// fill these in for all meds in the json file
x: -10,
y: 0
}, {
x: 0,
y: 10
}, {
x: 10,
y: 5
}]
}]
},
options: {
scales: {
xAxes: [{
type: 'linear',
position: 'top'
}]
}
}
});
}
meds.json
[
{
"name": "Simvastatin",
"dose": 10,
"dose unit": "mg",
"freq": "qd",
"route": "PO",
"last fill date": "2/15/2020",
"coverage": "100%",
"anticipated remaining fills": 2
},
{
"name": "Lisinopril",
"dose": 5,
"dose unit": "mg",
"freq": "qd",
"route": "PO",
"last fill date": "2/15/2020",
"coverage": "100%",
"anticipated remaining fills": 2
}
...... The list goes on
]
您实际上应该为此使用折线图,这会更合适,并且可以准确显示趋势和月份与剂量之间的关系。
但是既然你要求散点图...你可以这样做:
const data = [{
"name": "Simvastatin",
"dose": 10,
"dose unit": "mg",
"freq": "qd",
"route": "PO",
"last fill date": "2/15/2020",
"coverage": "100%",
"anticipated remaining fills": 2
},
{
"name": "Lisinopril",
"dose": 5,
"dose unit": "mg",
"freq": "qd",
"route": "PO",
"last fill date": "2/15/2020",
"coverage": "100%",
"anticipated remaining fills": 2
}
]
const transformedData = data.map(obj=>{
return {
x:new Date(obj["last fill date"]).getMonth() + 1,
y:obj.dose,
}
})
console.log(transformedData)
然后用作
var scatterChart = new Chart(ctx, {
type: 'scatter',
data: {
datasets: [{
label: 'Scatter Dataset',
data: transformedData
}]
},
options: {
scales: {
xAxes: [{
type: 'linear',
position: 'top'
}]
}
}
});
}
希望对您有所帮助!
Chart.js 散点图只接受点格式 (x, y) 的数据。我正在尝试使用名为 meds.json 的文件中有关药物的信息来填充数据点 更具体地说,x 将是药物最后一次填充日期的月份,y 将是剂量。
如何从 meds.json 文件中获取所有这些数据并将其插入到数据中以创建散点图的点? 如果我尝试获取所有日期并将它们存储在一个数组中,并将所有剂量值存储在另一个数组中,我该如何使用这些数组来填充点数据?
这是使用 Chart.js 制作散点图的方法,我正在尝试填充数据 'data' 下的 x、y 点:
// charts.js
var scatterChart = new Chart(ctx, {
type: 'scatter',
data: {
datasets: [{
label: 'Scatter Dataset',
data: [{
// x = month, y = dose
// fill these in for all meds in the json file
x: -10,
y: 0
}, {
x: 0,
y: 10
}, {
x: 10,
y: 5
}]
}]
},
options: {
scales: {
xAxes: [{
type: 'linear',
position: 'top'
}]
}
}
});
}
meds.json
[
{
"name": "Simvastatin",
"dose": 10,
"dose unit": "mg",
"freq": "qd",
"route": "PO",
"last fill date": "2/15/2020",
"coverage": "100%",
"anticipated remaining fills": 2
},
{
"name": "Lisinopril",
"dose": 5,
"dose unit": "mg",
"freq": "qd",
"route": "PO",
"last fill date": "2/15/2020",
"coverage": "100%",
"anticipated remaining fills": 2
}
...... The list goes on
]
您实际上应该为此使用折线图,这会更合适,并且可以准确显示趋势和月份与剂量之间的关系。
但是既然你要求散点图...你可以这样做:
const data = [{
"name": "Simvastatin",
"dose": 10,
"dose unit": "mg",
"freq": "qd",
"route": "PO",
"last fill date": "2/15/2020",
"coverage": "100%",
"anticipated remaining fills": 2
},
{
"name": "Lisinopril",
"dose": 5,
"dose unit": "mg",
"freq": "qd",
"route": "PO",
"last fill date": "2/15/2020",
"coverage": "100%",
"anticipated remaining fills": 2
}
]
const transformedData = data.map(obj=>{
return {
x:new Date(obj["last fill date"]).getMonth() + 1,
y:obj.dose,
}
})
console.log(transformedData)
然后用作
var scatterChart = new Chart(ctx, {
type: 'scatter',
data: {
datasets: [{
label: 'Scatter Dataset',
data: transformedData
}]
},
options: {
scales: {
xAxes: [{
type: 'linear',
position: 'top'
}]
}
}
});
}
希望对您有所帮助!