DbAccess: interactive statistics and graphics for plasma physics databases

DbAccess is an X-windows application, written in IDL®, meeting many specialized statistical and graphical needs of NSTX Plasma Physicists, such as regression statistics and the analysis of variance. Flexible “views” and “joins,” which include options for complex SQL expressions, facilitate mixing data from different database tables. General Atomics Plot Objects add extensive graphical and interactive capabilities. An example is included for plasma confinement-time scaling analysis using a multiple linear regression least-squares power fit.