Timezone: »

On the Unreasonable Effectiveness of Feature Propagation in Learning on Graphs with Missing Node Features
Emanuele Rossi · Henry Kenlay · Maria Gorinova · Benjamin Chamberlain · Xiaowen Dong · Michael Bronstein
Event URL: https://openreview.net/forum?id=TXwmT1-5Ego »

While Graph Neural Networks (GNNs) have recently become the de facto standard for modeling relational data, they impose a strong assumption on the availability of the node or edge features of the graph. In many real-world applications, however, features are only partially available; for example, in social networks, age and gender are available only for a small subset of users. We present a general approach for handling missing features in graph machine learning applications that is based on minimization of the Dirichlet energy and leads to a diffusion-type differential equation on the graph. The discretization of this equation produces a simple, fast and scalable algorithm which we call Feature Propagation. We experimentally show that the proposed approach outperforms previous methods on seven common node-classification benchmarks and can withstand surprisingly high rates of missing features: on average we observe only around 4% relative accuracy drop when 99% of the features are missing. Moreover, it takes only 10 seconds to run on a graph with ~2.5M nodes and ~23M edges on a single GPU.

Author Information

Emanuele Rossi (Imperial College London)
Henry Kenlay (University of Oxford)
Maria Gorinova (University of Edinburgh)
Benjamin Chamberlain (Twitter)
Xiaowen Dong (Oxford)
Michael Bronstein (USI)

More from the Same Authors