In my work I would like to use SymPy Matrices to represent matrices before I turn them into large numeric matrices for computation. I.e. I probably wouldn't use symbolic matrices for actual computation, I would love to use them to manipulate the math as much as possible beforehand.
To this end I would like to see SymPy matrices implement pluggable backends. It would be nice to be able to represent mathematical matrices and then, once everything has been optimized, to substitute in a Numpy Matrix, Sparse Matrix, Linear Operator, C-Code, External program, etc.... Others will certainly want to substitute in pure SymPy matrices or pure SymPy sparse matrices. Regarding your previous post about Sparse matrix algorithms I think the same thinking could apply. It would be nice to have the algorithms be backend-agnostic. I'm sure some people will want sparse matrices of pure SymPy objects, others might want speed. Others might have a new datatype that you haven't anticipated. If it's possible it would be nice to let the type of the elements be switchable. -matt On Sat, May 28, 2011 at 8:56 AM, SherjilOzair <sherjiloz...@gmail.com>wrote: > I would like to know how and where Sympy's matrices are used. > Is Sympy matrices used for numeric computing anywhere ? > Are Sympy Matrices expected to offer any advantage that matrices in > numpy/scipy or other libraries cannot offer ? > > Is its use limited to symbolic ? What size of Matrices with symbolic > content is used ? > Operations on Expr are way costlier than operations on numerics. So, > knowing the size of the symbolic matrices that are required would help > me in optimization when writing algorithms for sparse matrices, and > also when refactoring Matrix. > > I expect that one cannot use too large symbolic matrices, as solving/ > inversing/etc. would result in expression blowup. > > I would be glad if you could also tell what running time you would > expect from the matrices that you use. > > -- > You received this message because you are subscribed to the Google Groups > "sympy" group. > To post to this group, send email to sympy@googlegroups.com. > To unsubscribe from this group, send email to > sympy+unsubscr...@googlegroups.com. > For more options, visit this group at > http://groups.google.com/group/sympy?hl=en. > > -- You received this message because you are subscribed to the Google Groups "sympy" group. To post to this group, send email to sympy@googlegroups.com. To unsubscribe from this group, send email to sympy+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/sympy?hl=en.
