15 Aug
2009
15 Aug
'09
10 a.m.
Edward Grace wrote: > Hmm, is the 'vector' and 'matrix' paradime you have in mind in the > same manner as MATLAB? Yes, NT2 is no more no less than a copycat of Matlab in C++ > There they seem to be two-faced, they are mathematical vectors and > matricies but also just collections of values. They are. nt2::matrix acts a s multi-dimensional collection of numerical values that supports large nbr of functions and methods. > Perhaps there needs to be a reasonable distinction between element > wise operations and global operations on the object, for instance all > the different types of product > > - Matrix product (* in MATLAB) > - Hadamard product (.* in MATLAB) > - Kronecker product (kron(A,B) in MATLAB) > - Tensor product (tprod MATLAB Mex > http://www.mathworks.com/matlabcentral/fileexchange/16275) What I do now is having : - * being matrix product - mul() beign Hadamard - kron and tprod bieng what they are. Of course matrix * scalar falls back to Hadamard. The underlying principles of NT2 is that matrix is the common representation for all domain-specific entities. So we have a polynom, image and even transform object that reuse components of matrix to perform their computation but with a stricter semantic. Matrix also play the role of Lin. Alg. matrix and vector. -- ___________________________________________ Joel Falcou - Assistant Professor PARALL Team - LRI - Universite Paris Sud XI Tel : (+33)1 69 15 66 35