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Re: Queries: notebook, matrices

• To: mathgroup at smc.vnet.net
• Subject: [mg26991] Re: [mg26975] Queries: notebook, matrices
• From: maarten.vanderburgt at icos.be
• Date: Tue, 30 Jan 2001 23:22:14 -0500 (EST)
• Sender: owner-wri-mathgroup at wolfram.com

Hi,

1. you can speed this up if you select all cells by Ctrl+A and then execute
everything by Shift+Enter
2. do (B = A.A)//MatrixForm, then B is again a matrix
3. Look in the help for Export [ ]. You can export the matrix as a list or
a table, which you can import in Exell. I believe in Mathematica 4.1 the
Export and Import functions support  more types of import/export.

Maarten van der Burgt
Icos Vision Systems
Leuven, Belgium





"M. Damerell" <uhah208 at rhbnc.ac.uk> on 30-01-2001 09:38:24 AM

cc:

Subject: [mg26991]  [mg26975] Queries: notebook, matrices




Sorry if these are answered in a FAQ file, I could not
find any FAq file for this group. Math. 4.0,  windows95.

1. I do a lot of calculation in a notebook, save it,
then when I restart Math & open the file I have to
recalculate each item before I can resume where I
left off.  Is there any way to tell Math to recalculate
everything when the file is reopened?

2. I enter a matrix as (say)  A={{1,2,3},{4,5,6} etc
and it displays in that form. Is there any way to make
Math display matrices as matrices? I know you can do

B=A.A//MatrixForm

this looks right but Math doesnt know this is a matrix.
So I would like matrices to be held internally in list
form but displayed in matrix form.

3. and finally, is there any way to export the matrix
into  Excel?