BibTeX
@INCOLLECTION{
         Willkomm2012TIo,
       title = "The Impact of Dynamic Data Reshaping on Adjoint Code Generation for Weakly-Typed
         Languages Such as {M}atlab",
       doi = "10.1007/978-3-642-30023-3_12",
       author = "Johannes Willkomm and Christian H. Bischof and H. Martin B{\"u}cker",
       abstract = "Productivity-oriented programming languages typically emphasize convenience over
         syntactic rigor. A well-known example is Matlab, which employs a weak type system to allow the user
         to assign arbitrary types and shapes to a variable, and it provides various shortcuts in programming
         that result in implicit data reshapings. Examples are scalar expansion, where a scalar is implicitly
         expanded to a matrix of the appropriate size filled with copies of the scalar value, the use of row
         vectors in place of column vectors and vice versa, and the automatic expansion of arrays when
         indices outside of the previously allocated range are referenced. These features need to be
         addressed at runtime when generating adjoint code, as Matlab does not provide required information
         about types, shapes and conversions at compile time. This fact, and the greater scope of reshaping
         possible, is a main distinguishing feature of Matlab compared to traditional programming languages,
         some of which, e.g. Fortran 90, also support vector expressions. In this paper, in the context of
         the AdiMAT source transformation tool for Matlab, we develop techniques generally applicable for
         adjoint code generation in the face of dynamic data reshapings occurring both on the left- and
         right-hand side of assignments. Experiments show that in this fashion correct adjoint code can be
         generated also for very dynamic language scenarios at moderate additional cost.",
       pages = "127--138",
       crossref = "Forth2012RAi",
       booktitle = "Recent Advances in Algorithmic Differentiation",
       series = "Lecture Notes in Computational Science and Engineering",
       publisher = "Springer",
       address = "Berlin",
       volume = "87",
       editor = "Shaun Forth and Paul Hovland and Eric Phipps and Jean Utke and Andrea Walther",
       isbn = "978-3-540-68935-5",
       issn = "1439-7358",
       year = "2012",
       ad_tools = "ADiMat"
}