Hello, > De : users [mailto:users-boun...@lists.scilab.org] De la part de Rafael Guerra > Envoyé : mardi 5 juin 2018 23:42 > > Fyi, the following reference on empty matrices algebra is extremelly good > [...] > Nett, C. N. and W. M. Haddad [1993] "A system-theoretic appropriate > realization of the empty matrix concept," > IEEE Transactions on Automatic Control, vol. 38, no. 5, pp. 771-775
Thanks for this reference. It can be found here: https://haddad.gatech.edu/journal/00277245.pdf Some quotations: "The elegance afforded by the empty matrix approach can potentially be exploited to great advantage in the context of large-scale software development. Indeed, the traditional approach to special cases one must include in the software explicit checks for special cases along with appropriate provisions for each special case. This would be done for each matrix formula implemented in the software with potential for special cases of the type described above. Using the empty matrix approach, one would simply introduce the empty matrix as an object, or data type, and then code its algebraic realization. This would be done only once. Subsequent code would then be devoid of cumbersome explicit checks and provisions for special cases of the type described above." " Additionally, the examples are used to show how the empty matrix concept can be utilized to transparently handle static and/or single vector input, single vector output (SVISVO) systems within the more general context of dynamic, two vector input, two vector output (TVITVO) systems" So, it seems that having a correct algebraic handling of the empty matrixes could be of great interest for some users. I might post a wish on Bugzilla but not right now, so if someone else is willing to do this... -- Christophe Dang Ngoc Chan Mechanical calculation engineer This e-mail may contain confidential and/or privileged information. If you are not the intended recipient (or have received this e-mail in error), please notify the sender immediately and destroy this e-mail. Any unauthorized copying, disclosure or distribution of the material in this e-mail is strictly forbidden. _______________________________________________ users mailing list users@lists.scilab.org http://lists.scilab.org/mailman/listinfo/users
