Re: symbolic computation


"dimitur" <sypermen2000@xxxxxxxxx> wrote in message
news:ef55e54.6@xxxxxxxxxxxxxxxxxxxxxxxxxx

Matrix Q form [Q,R]=qr(A), have important properties im my task. By
symbolic decomposition I can see feature of matrix Q. For this I need
symbolic presentation of matrix Q.
Are exist presentation by "pretty" of matrix Q (result from
maple('linalg[QRdecomp](A)')?

I could NOT find one. output of the above is in Maple full matrix format,
which Matlab does not know how to 'pretty'

When decomposition matrix A
A=[0.907/z -0.106/z;
-0.041+0.345/z 0.005-0.1/z;
0.087+0.167/z -0.103+0.84/z;
-0.148 0.017+0.527/z].
with
maple('linalg[QRdecomp](A)')
obtained error!!
May be I missing anything ?

I got the same error:

maple('A:=Matrix([ [0.907/z, -0.106/z], [-0.041+0.345/z,
0.005-0.1/z], [0.087+0.167/z, -0.103+0.84/z], [-0.148,
0.017+0.527/z] ])');
maple('linalg[QRdecomp](A)')
??? Error using ==> maple
Error, (in linalg[QRdecomp]) matrix entries must all evaluate to complex
floats

linalg is old maple linear algebra package any way, one should use
LinearAlgebra package instead.
Try to enter the above using LinearAlgebra package.

(if you want to do lots of symbolic stuff you should get Maple or
Mathematica), I did the above in Mathematica 6 and got the answer right
away.(too large to post here)

Nasser









.

Relevant Pages

  • Re: symbolic computation
    ... Nasser Abbasi wrote: ... linalg is old maple linear algebra package any way, ... Try to enter the above using LinearAlgebra package. ... Mathematica), I did the above in Mathematica 6 and got the answer ...
    (comp.soft-sys.matlab)
  • Re: Maple 8 | subs and matrices
    ... >LinearAlgebra package. ... >it is specific to maple. ... as for the appropriate forum - good point. ... on the larger topic - I wonder if there is a 'rationale' reason ...
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