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Matrix questions

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  • Subject: [mg109431] Matrix questions
  • From: "S. B. Gray" <stevebg at ROADRUNNER.COM>
  • Date: Tue, 27 Apr 2010 04:05:05 -0400 (EDT)
  • Reply-to: stevebg at ROADRUNNER.COM

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];

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

Steve Gray

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