在eCharts中,如何修改以下
option
以在图表中显示多条线?我想要的是一条生产“抹茶拿铁”的生产线和一条生产“奶酪可可”的生产线?如果可能的话,我想保持数据集不变。
option = {
legend: {},
tooltip: {},
dataset: {
dimensions: [{name:'product', type:'ordinal'}, {name:'date'},
{name:'value'}],
source: [
{product: 'Matcha Latte', 'date': 2016, 'value': 85.8},
{product: 'Matcha Latte', 'date': 2017, 'value': 73.4},
{product: 'Cheese Cocoa', 'date': 2016, 'value': 65.2},
{product: 'Cheese Cocoa', 'date': 2017, 'value': 53.9}
]
},
xAxis: {type: 'category', name: 'date'},
yAxis: {type: 'value', name: 'value'},
series: [
{type: 'line', encode: {x: 'date', y:'value'}},
]
};
您可以使用过滤器转换数据集:
option = {
legend: {},
tooltip: {},
dataset: [
{
dimensions: [
{ name: 'product', type: 'ordinal' },
{ name: 'date' },
{ name: 'value' }
],
source: [
{ product: 'Matcha Latte', date: 2016, value: 85.8 },
{ product: 'Matcha Latte', date: 2017, value: 73.4 },
{ product: 'Cheese Cocoa', date: 2016, value: 65.2 },
{ product: 'Cheese Cocoa', date: 2017, value: 53.9 }
]
},
{
fromDatasetIndex: 0,
transform: [
{
type: 'filter',
config: {
dimension: 'product',
value: 'Matcha Latte'
}
}
]
},
{
fromDatasetIndex: 0,
transform: [
{
type: 'filter',
config: {
dimension: 'product',
value: 'Cheese Cocoa'
}
}
]
}
],
xAxis: { type: 'category', name: 'date' },
yAxis: { type: 'value', name: 'value' },
series: [
{ datasetIndex: 1, type: 'line', encode: { x: 'date', y: 'value' } },
{ datasetIndex: 2, type: 'line', encode: { x: 'date', y: 'value' } }
]
};
通过更改来源(是的,抱歉),你可以这样做:
option = {
legend: {},
tooltip: {},
dataset: {
dimensions: [{name:'product', type:'ordinal'}, {name:'date'},
{name:'value'}],
source: [ // Sorry for your dataset :'(
{ 'date': 2016, 'Matcha Latte': 85.8, 'Cheese Cocoa': 65.2 },
{ 'date': 2017, 'Matcha Latte': 73.4, 'Cheese Cocoa': 53.9 },
]
},
xAxis: {type: 'category', name: 'date'},
yAxis: {type: 'value', name: 'value'},
series: [
{type: 'line', encode: {x: 'date', y: 'Matcha Latte' }}, // First chart with Matcha Latte values as y and date as x
{type: 'line', encode: {x: 'date', y: 'Cheese Cocoa' }}, // Second chart with date and Cheese Cocoa values
]
};
``