I'll get in contact with him. I might just build a new object for them. On Friday, March 8, 2013 4:58:17 AM UTC-5, Ben Fishbein wrote: > > I want to add a few things to sympy's matrices class such as image > and kernel of a matrix. Both of these are represented as the span of a set > of vectors. > Spans will normally take the form of span(v1,v2,v3...,vx) where all vs are > vectors of equal length. > I'm not exactly sure how to represent these in python. Initially I was > planning on a single vector with multiple variables > for example > m = Matrix([1, 2], [3, 4]) > print m.image() #probably also implement a pretty print > [x+2y, 3x+4y] > # [x + 2y] > # [3x + 4y] ## pprint possibility > ## I'm not sure if x,y = real is implied or not > However, it also could be implemented like > print m.image() > span([1, 3], [2, 4]) > # / [1] [2] \ > # span| [ ] [ ] | #pprint possibility > # \ [3] , [4] / > It could also be a regular matrix with a special property such as > span = true > m = Matrix([1, 2], [3, 4]) > m.setSpan() = true > Though admittedly I haven't completely worked out how this would > work/be implemented with out making the syntax inconsistent between > multiple matrices. > > I'm just looking for some 2 cents about what you think would be best/most > consistent with the rest of sympy >
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