KNNGraph。根据节点坐标pos,创建一个K邻近图(原图只有点,没有边,相当于自定义边),类似的操作有RadiusGraph(基于半径阈值) ToDense。将一个稀疏的邻接矩阵转换为方阵,大小为[num_nodes, num_nodes, *]; TwoHop。将两条节点关系加入到edge_index中; LineGraph。将一个图转换为线图,新图的节点特征为原图边特征,...
edge_index = knn_graph(x, self.k, batch, loop=False, flow=self.flow) return super(DynamicEdgeConv, self).forward(x, edge_index)
categories=['Airplane'])dataset[0]# Data(pos=[2518, 3], y=[2518])# 2. 基于最近邻的转换dataset=ShapeNet(root='/tmp/ShapeNet',categories=['Airplane'],pre_transform=T.KNNGraph(k=6))dataset[0]# Data(edge_index=[2, 15108], pos=[2518, 3], y=[2518])# 3. 基于最近邻的转换+...
dataset = ShapeNet(root='/tmp/ShapeNet', categories=['Airplane'], pre_transform=T.KNNGraph(k=6), transform=T.RandomTranslate(0.01)) dataset[0] >>> Data(edge_index=[2, 15108], pos=[2518, 3], y=[2518]) 1. 2. 3. 4. 5. 6. 7. 8. 9. 最新版本中是torch_geometric.transforms.R...
import torch_geometric.transforms as T from torch_geometric.datasets import ShapeNet dataset = ShapeNet(root='/tmp/ShapeNet', categories=['Airplane'], pre_transform=T.KNNGraph(k=6)) dataset[0] >>> Data(edge_index=[2, 15108], pos=[2518,3], y=[2518]) 1 2 3 4 5 6 7...
在这里,knn_graph()计算一个最近邻图,该图进一步用于调用EdgeConv的方法。forward() 这给我们留下了一个干净的接口来初始化和调用这个层: conv = DynamicEdgeConv(3, 128, k=6)x = conv(x, batch)
还可以通过transform在一定范围内随机平移每个点,增加坐标上的扰动,做数据增强: import torch_geometric.transforms as Tfrom torch_geometric.datasets import ShapeNetdataset = ShapeNet(root='/tmp/ShapeNet', categories=['Airplane'],pre_transform=T.KNNGraph(k=6),transform=T.RandomTranslate(0.01))# dataset[...
pyggnn 图回归 python knn回归 1.项目背景K近邻算法回归模型则将离待预测样本点最近的K个训练样本点的平均值进行待预测样本点的回归预测。K近邻除了能进行分类分析,还能进行回归分析,即预测连续变量,此时的KNN称为K近邻回归模型。回归问题是一类预测连续值的问题,而能满足这样要求的数学模型称作回归模型,本项目应用K近...
Graph Neural Network Library for PyTorch. Contribute to pyg-team/pytorch_geometric development by creating an account on GitHub.
Added an optional batch_size argument to fps, knn, knn_graph, radius and radius_graph (#7368) Added PrefetchLoader capabilities (#7376, #7378, #7383) Added an example for hierarchical sampling (#7244) Added Kùzu remote backend examples (#7298) Added an optional add_pad_mask argument to ...