  The kappa_SQ software package is designed to assist researchers working on
randomized row sampling. The package contains a collection of Matlab functions
along with a GUI that ties them all together and provides a platform for the
user to perform experiments. In particular, kappa_SQ is designed to do
experiments related to the two-norm condition number of a sampled matrix,
$\kappa(SQ)$, where $S$ is a row sampling matrix and $Q$ is a tall and skinny
matrix with orthonormal columns. Via a simple GUI, kappa_SQ can generate test
matrices, perform various types of row sampling, measure $\kappa(SQ)$,
calculate bounds and produce high quality plots of the results. All of the
important codes are written in separate Matlab function files in a standard
format which makes it easy for a user to either use the codes by themselves or
incorporate their own codes into the kappa_SQ package.
