[Blindmath] matricies.

[Sabra Ewing]

I agree that XL is very good at matrices and it's much easier to navigate one on the computer because you can go to the exact row column and sell you want to without getting all confused and lost on the page.and if you're going to have a really big one, the computer will also make more sense so that your matrix won't take up several brill pages.Plus, you probably wouldn't want to solve a really big one by hand.

Sabra Ewing

> On Dec 17, 2014, at 3:39 AM, Joseph C. Lininger via Blindmath <blindmath at nfbnet.org> wrote:
> 
> Derek
> Let me answer your first question first. Navigating matrices depends on how you want to do it. If you're talking on the computer, using a combination of the LaTeX representation and sometimes placing elements of the matrix in excel to work with them worked for me. Annoying sometimes, but doable. I also recommend you obtain a copy of the Octive (might be spelled Octave, I don't remember) software; it's an open source package that is very good at Matrix operations. It's similar to matlab in a lot of ways, or used to be anyway. You'll be wanting that after about the hundrith reduce operation. LOL Probably you can't use it on a test, but it helps to check your work and such for homework.
> 
> Now, to answer your representation questions. In LaTeX, you can write matrices as follows. Assume you're already in math mode, then you would do something like this. Please note that the B's are capitalized; you want them to be in order to have the braces typeset right.
> 
> \begin{Bmatrix}
> 1 & 2 & 3\\
> 4 & 5 & 6\\
> 7 & 8 & 9
> \end{Bmatrix}
> 
> This creates a 3 by three matrix. The first row reads "1, 2, 3". It is obvious how the rest read. The Bmatrix tells LaTeX to surround the entire group with square braces, which is the standard.
> 
> In Nemeth, the syntax is as follows. dot four, then a left paren symbol. (the nemeth one, which is an "of" sign). Then write the first row of elements, each separated with a space. Then do a dot four, followed by a right paren. (The "with" sign) Do the same for subsequent rows.
> 
> Hope this helps
> Joe
> 
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