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Re: Queries: notebook, matrices

• To: mathgroup at smc.vnet.net
• Subject: [mg27028] Re: Queries: notebook, matrices
• From: "Allan Hayes" <hay at haystack.demon.co.uk>
• Date: Tue, 30 Jan 2001 23:22:44 -0500 (EST)
• References: <9562tq$6q@smc.vnet.net>
• Sender: owner-wri-mathgroup at wolfram.com

"M. Damerell" <uhah208 at rhbnc.ac.uk> wrote in message
news:9562tq$6q at smc.vnet.net...
 ---- Snip -------
> 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?

There is a menu command:  Kernel > Evaluation > Evaluate Notebook

If your calculations take a lot of time then you might consider using Save
to save definitions in a file

> 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.

Use
(B=A)//MatrixForm
 or
Set menu > Default Output Format Type > TraditionalForm
or
convert appropriate output cells to TraditionalForm using menu > Cell >
Convert To > TraditionalForm

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

I guess

Mathematica Link for Excel:
http://www.wolfram.com/products/applications/excel_link/
or
Database Access Kit  http://www.wolfram.com/products/applications/dbak/



--
Allan
---------------------
Allan Hayes
Mathematica Training and Consulting
Leicester UK
www.haystack.demon.co.uk
hay at haystack.demon.co.uk
Voice: +44 (0)116 271 4198
Fax: +44 (0)870 164 0565