Feature Hashing in R

featurehashing

#1

Can someone help me what “Hashing Trick” is? Also please direct me to any docs if any.
Thank You


#2

Feature hashing is the encoding of multiple features into a single numeric ‘feature’ of a given range. Not really a feature, but a hash map. It’s particularly useful for compressing sparse matrices (matrices with many 0’s). For more information, read wikipedia’s hash table page and Hash Collision Probabilities.


#3

https://www.quora.com/Can-you-explain-feature-hashing-in-an-easily-understandable-way


#4

Here is a link explaining feature hashing with good example in R code http://amunategui.github.io/feature-hashing/