How is syntactic distance computed when there are missing features

[Genius1237]

The vectors for syntax have missing entries "--" because the WALS database has missing entries for those features.

Could you please let me know how is syntactic distance computed given these missing entries?

[antonisa]

Sorry for the delay in responding, I must have missed the notification email!

The dimensions with missing features are ignored. So if e.g. there are 100 dimensions in each vector, and vector x is missing features 1-20, and vector y is missing features 80-100, then the distance is computed over the features 20-80.