Re: symbolic computation

Nasser Abbasi wrote:



"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
-----------
Sir Nasser,
thank you very mach again. Then I want ask you, possible I send you
by mail, matrix A, and to make answer with mathematica and send
matrix Q ?
Are you possible in .doc format?
.

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