Updates to R Packages

I’ve uploaded a new version of fingerprint (v 3.4) which now supports feature fingerprints – fingerprints that are represented as variable length vectors of numbers or strings. An example would be circular fingerprints. Now, when reading fingerprints you have to indicate whether you’re loading binary fingerprints or not (via the binary argument in fp.read). A […]

Path Fingerprints and Hash Quality

Recently, on an email thread I was involved in, Egon mentioned that the CDK hashed fingerprints were probably being penalized by the poor hashing provided by Java’s hashCode method. Essentially, he suspected that the collision rate was high and so that the many bits were being set multiple times by different paths and that a fraction of bits were not […]