What it does, what it means, and how it works

A central theme of this book is to merge the abstract with the concrete by linking mathematics to runnable computer codes. The codes are in a consistent style using nomenclature that resembles the accompanying mathematics so the two illuminate each other. The code shown is exactly that used to generate the illustrations. There is little or no mathematics or code that is not carried through with examples using both synthetic and real data. The code itself is in a dialect of Fortran more suitable for exposition than standard Fortran. (This "ratfor" dialect easily translates to standard Fortran). Some codes have been heavily tested while others have only been tested by the preparation of the illustrations.