pyecharts桑基图节点布局调整
时间: 2023-09-21 17:07:00 浏览: 39
Pyecharts 中的桑基图(Sankey)默认使用 D3.js 的布局算法来排列节点。如果需要调整节点的布局,可以通过以下两种方式实现:
1.手动调整节点位置
可以通过设置节点的 x 和 y 坐标来手动调整节点的位置。例如:
```python
from pyecharts import options as opts
from pyecharts.charts import Sankey
nodes = [
{"name": "A"},
{"name": "B"},
{"name": "C"},
]
links = [
{"source": "A", "target": "B", "value": 100},
{"source": "A", "target": "C", "value": 50},
{"source": "B", "target": "C", "value": 30},
]
sankey = Sankey()
sankey.add(
"sankey",
nodes,
links,
label_opts=opts.LabelOpts(position="right"),
linestyle_opt=opts.LineStyleOpts(opacity=0.2),
)
# 手动调整节点位置
sankey.set_node(
"A", x=10, y=10
).set_node(
"B", x=50, y=50
).set_node(
"C", x=100, y=100
)
sankey.render("sankey.html")
```
2.使用自定义布局算法
可以通过继承 `pyecharts.commons.utils.layout.LayoutBase` 类来实现自定义布局算法。例如:
```python
from pyecharts.commons.utils import JsCode
from pyecharts.charts import Sankey
from pyecharts import options as opts
class CustomLayout:
def __init__(self, node_x, node_y):
self.node_x = node_x
self.node_y = node_y
def layout(self, nodes, links):
for node in nodes:
node['x'] = self.node_x[node['name']]
node['y'] = self.node_y[node['name']]
return nodes, links
nodes = [
{"name": "A"},
{"name": "B"},
{"name": "C"},
]
links = [
{"source": "A", "target": "B", "value": 100},
{"source": "A", "target": "C", "value": 50},
{"source": "B", "target": "C", "value": 30},
]
node_x = {"A": 10, "B": 50, "C": 100}
node_y = {"A": 10, "B": 50, "C": 100}
sankey = Sankey()
sankey.add(
"sankey",
nodes,
links,
label_opts=opts.LabelOpts(position="right"),
linestyle_opt=opts.LineStyleOpts(opacity=0.2),
)
# 使用自定义布局算法
sankey.set_global_opts(
layout=CustomLayout(node_x, node_y),
)
sankey.render("sankey.html")
```
以上代码中,`CustomLayout` 类中的 `layout` 方法会接收到桑基图的节点和边列表,然后对节点进行自定义布局,并返回新的节点和边列表。在 `Sankey` 对象中,可以通过 `set_global_opts` 方法将自定义的布局算法应用到桑基图中。