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Re: Matrix questions

  • To: mathgroup at smc.vnet.net
  • Subject: [mg109453] Re: Matrix questions
  • From: Bob Hanlon <hanlonr at cox.net>
  • Date: Tue, 27 Apr 2010 08:28:31 -0400 (EDT)
  • Reply-to: hanlonr at cox.net

1. Control+Return adds a row (or Menu: Insert / Table/Matrix / Add Row), 
Control +comma (or Menu: Insert / Table/Matrix / Add Column) adds a column

2. Menu :  Mathematica / Preferences ... / Appearance / Syntax Coloring / Other / Comments

3. 

mff = Array[Subscript[a, ##] &, {3, 3}];

(mfg = mff) // MatrixForm

Det[mff] == Det[mfg]

True


Bob Hanlon

---- "S. B. Gray" <stevebg at ROADRUNNER.COM> wrote: 

=============
1. I don't get how to use AddRow. I think I remember that there was a 
one-key way to add a row or column.

2. How do I change the color of comments?

3. How can I make Det[mfg] appear in expanded form like Det[mff] does?

mff = Array[Subscript[a, ##] &, {3, 3}];
mfg = MatrixForm[mff];
Det[mff]
Det[mfg]

I haven't used Mathematica for several years and am using it again.
Thanks for any tips.

Steve Gray




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