Here is a list of all documented files with brief descriptions:

array_ops.sql_in [code]	Implementation of array operations in SQL
assoc_rules.sql_in [code]	The assoc_rules function computes association rules for a given set of data. The data is assumed to have two dimensions; items (between which we are trying to discover associations), and a transaction id. This tranaction id groups the items by event and could also be a user id, date, etc. depending on the context of the data. This function assumes the data is stored in two columns with one transaction id and one item per row
bayes.sql_in [code]	SQL functions for naive Bayes
c45.sql_in [code]	C4.5 APIs and main controller written in PL/PGSQL
compatibility.sql_in [code]	Compatibility SQL functions
conjugate_gradient.sql_in [code]	SQL function computing Conjugate Gradient
correlation.sql_in [code]	SQL functions for correlation computation
cox_prop_hazards.sql_in [code]	SQL functions for cox proportional hazards
crf.sql_in [code]	SQL functions for conditional random field
crf_data_loader.sql_in [code]	Create database tables and import POS/NER training/testing data to the database
crf_feature_gen.sql_in [code]	SQL function for POS/NER feature extraction
cross_validation.sql_in [code]	SQL functions for cross validation
dt.sql_in [code]	Common functions written in PL/PGSQL shared by C4.5 and RF
dt_preproc.sql_in [code]	Functions used in C4.5 and random forest for data preprocessing
dt_utility.sql_in [code]	Utility functions widely used in C4.5 and random forest
elastic_net.sql_in [code]	SQL functions for elastic net regularization
hypothesis_tests.sql_in [code]	SQL functions for statistical hypothesis tests
kmeans.sql_in [code]	Set of functions for k-means clustering
lda.sql_in [code]	SQL functions for Latent Dirichlet Allocation
linalg.sql_in [code]	SQL functions for linear algebra
linear.sql_in [code]	SQL functions for linear regression
lmf.sql_in [code]	SQL functions for low-rank matrix factorization
logistic.sql_in [code]	SQL functions for logistic regression
multilogistic.sql_in [code]	SQL functions for multinomial logistic regression
online_sv.sql_in [code]	SQL functions for support vector machines
prob.sql_in [code]	SQL functions for evaluating probability functions
profile.sql_in [code]	SQL function for single-pass table profiles
quantile.sql_in [code]	SQL function for Quantile
rf.sql_in [code]	Random forest APIs and main control logic written in PL/PGSQL
sample.sql_in [code]	SQL functions for random sampling
sketch.sql_in [code]	SQL functions for sketch-based approximations of descriptive statistics
summary.sql_in [code]	Summary function for descriptive statistics
svdmf.sql_in [code]	SQL functions for SVD Matrix Factorization
svec.sql_in [code]	SQL type definitions and functions for sparse vector data type `svec`
utilities.sql_in [code]	SQL functions for carrying out routine tasks
utils_regularization.sql_in [code]
viterbi.sql_in [code]	Concatenate a set of input values into arrays to feed into viterbi c function and create a human readable view of the output