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Command Line Tools
==================
This directory contains command line tools for RAPPOR analysis.
Analysis Tools
--------------
### decode-dist
Decode a distribution -- requires a "counts" file (summed bits from reports),
map file, and a params file. See `test.sh decode-dist` in this dir for an
example.
### decode-assoc
Decode a joint distribution between 2 variables ("association analysis"). See
`test.sh decode-assoc-R` or `test.sh decode-assoc-cpp` in this dir for an
example.
Currently it only supports associating strings vs. booleans.
### Setup
Both of these tools are written in R, and require several R libraries to be
installed (see `../setup.sh r-packages`).
`decode-assoc` also shells out to a native binary written in C++ if
`--em-executable` is passed. This requires a C++ compiler (see
`analysis/cpp/run.sh`). You can run `test.sh decode-assoc-cpp` to test it.
Helper Tools
------------
These are simple Python implementations of tools needed for analysis. At
Google, Chrome uses alternative C++/Go implementations of these tools.
### sum-bits
Given a CSV file with RAPPOR reports (IRRs), produce a "counts" CSV file on
stdout. This is the `m x (k+1)` matrix that is used in the R analysis (where m
= #cohorts and k = report width in bits).
### hash-candidates
Given a list of candidates on stdin, produce a CSV file of hashes (the "map
file"). Each row has `m x h` cells (where m = #cohorts and h = #hashes)
See the `regtest.sh` script for examples of how these tools are invoked.
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