# Re: hard-coded program for 3x3 matrix square root?

*From*: Zara <yozara@xxxxxxxx>*Date*: Wed, 26 Mar 2008 07:27:58 +0100

On Tue, 25 Mar 2008 21:32:52 -0700, "huhua" <lunamoonmoon@xxxxxxxxx>

wrote:

Hi all,

I need a matrix square root function in C/C++.

I only need it for 3x3 matrix, so I decide to find some hard-coded piece of

program, instead of using some numerical library, because then I have to

learn some new API and how to link and how to use stuff.

To avoid the trouble, I think a 3x3 hard-coded program is sufficient for me.

That's to say, given M a 3x3 matrix, I want to find M^(0.5) in C/C++.

Any place I can find some simple matrix square root function? I don't want

to use those huge library, because compiling them and try to make them work

will talke a while... for example, I have tried compiling CALAPACK... it

seemed very complicated...

Any thoughts on that?

How about using a nested loop and sqrt function?

.

**Follow-Ups**:**Re: hard-coded program for 3x3 matrix square root?***From:*Zeljko Vrba

**References**:**hard-coded program for 3x3 matrix square root?***From:*huhua

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