## General programming

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How can I divide matrixes? Is it even possible? Posted by dj jukkis on 30 Oct 2000 at 9:20 AM
How can I divide matrixes? Is it even possible?<br>
I mean, like: <br>
<br>
[x y n] / [[a b c]<br>
[d e f]<br>
[g h i]]<br>
<br>
is this possible to count?<br>
is it like multiplying matrixes?<br>
if this sounds stupid, please note that I'm only 16 years old, and a beginning programmer...

sorry, the matrixes were messed up... Posted by dj jukkis on 30 Oct 2000 at 9:22 AM
sorry, the matrixes are a bit messed up in my earlier message...<br>
here they are:<br>
<br>
[x y n] / [[a b c][d e f][g h i]]<br>
(3x1) and (3x3)<br>

Re: sorry, the matrixes were messed up... Posted by Unknown on 30 Oct 2000 at 5:58 PM
: sorry, the matrixes are a bit messed up in my earlier message...<br>
: here they are:<br>
: <br>
: [x y n] / [[a b c][d e f][g h i]]<br>
: (3x1) and (3x3)<br>
: <br>
: <br>
<br>
I'm 16 and I learned this years ago. <br>
<br>
First the basic concept you should have learn even more years ago than I was talking about in my last sentence. <br>
<br>
To divide you multiply by the reciprocal, or the inverse.<br>
<br>
The same applies to matrices. You simply find the inverse matrix and multiply. This isn't a programming question, it's an algebra one.<br>
<br>
http://www.iln.net/html_p/c/53785/53786/53801/53874/55269_55318.asp<br>
<br>
this site has an example of finding an inverse matrix of a 3x3 matrix.<br>
<br>
While it has it under Pre-Calculus, I learned it in Algebra 2. <br>
<br>
I didn't learn their way of finding the inverse, but whatever, it's just quicker to point you in that direction. You should be able to form an algorithm from that.<br>
<br>
There's definitely a more straightforward computational way to find it, and the way I was taught is nicer on algorithms, but like I said, whatever.

which country are you from? Posted by dj on 30 Oct 2000 at 11:12 PM
I was just wondering... my father is a dimplom engineer (I don't know if the translation is correct) systems developer and he doesn't know nothing about matrixes. In finland where i live, they don't teach us matrixes until we get to the university...

Thanks anyway... Posted by Unknown on 30 Oct 2000 at 11:13 PM
: : sorry, the matrixes are a bit messed up in my earlier message...<br>
: : here they are:<br>
: : <br>
: : [x y n] / [[a b c][d e f][g h i]]<br>
: : (3x1) and (3x3)<br>
: : <br>
: : <br>
: <br>
: I'm 16 and I learned this years ago. <br>
: <br>
: First the basic concept you should have learn even more years ago than I was talking about in my last sentence. <br>
: <br>
: To divide you multiply by the reciprocal, or the inverse.<br>
: <br>
: The same applies to matrices. You simply find the inverse matrix and multiply. This isn't a programming question, it's an algebra one.<br>
: <br>
: http://www.iln.net/html_p/c/53785/53786/53801/53874/55269_55318.asp<br>
: <br>
: this site has an example of finding an inverse matrix of a 3x3 matrix.<br>
: <br>
: While it has it under Pre-Calculus, I learned it in Algebra 2. <br>
: <br>
: I didn't learn their way of finding the inverse, but whatever, it's just quicker to point you in that direction. You should be able to form an algorithm from that.<br>
: <br>
: There's definitely a more straightforward computational way to find it, and the way I was taught is nicer on algorithms, but like I said, whatever.<br>
: <br>
<br>

Re: Thanks anyway... Posted by eric mantz on 31 Oct 2000 at 12:00 PM
<br>
: : <br>
: : I'm 16 and I learned this years ago. <br>
: : <br>
: : First the basic concept you should have learn even more years ago than I was talking about in my last sentence. <br>
: : <br>
<br>
Well bully for you! Some of us didn't do this at school and others may have forgotten it!<br>
Your reply works on the asumption that you're clever minded, but you're a dork! Get a life!

Re: Re: Thanks anyway... Posted by Unknown on 1 Nov 2000 at 7:27 PM
: <br>
: : : <br>
: : : I'm 16 and I learned this years ago. <br>
: : : <br>
: : : First the basic concept you should have learn even more years ago than I was talking about in my last sentence. <br>
: : : <br>
: <br>
: Well bully for you! Some of us didn't do this at school and others may have forgotten it!<br>
: Your reply works on the asumption that you're clever minded, but you're a dork! Get a life!<br>
: <br>
<br>
1. I did forget how to make inverse matrices, but I'm not stupid enough not to know how to use a search engine.<br>
<br>
2. Are you saying you are a moron?<br>
<br>
3. My reply works on the assumption that you aren't a moron. I just thought that that was a pre-requisite for programming (with the exception of VB).<br>
<br>
4. Your the one interested in dividing matrices, not me.<br>
<br>
5. If you are a moron, then what the hell are you doing programming?<br>
<br>
6. If you didn't do it in school, see reply 1 and this. It's not my problem, it's yours.<br>
<br>
7. Finally, programming REQUIRES clever thinking and math helps a lot.<br>
<br>
And just to ease my curiousity, do you program in VB? 'Cause that would explain a lot.

Re: Re: Re: Thanks anyway... Posted by Unknown on 2 Nov 2000 at 11:01 AM
<br>
: 1. I did forget how to make inverse matrices, but I'm not stupid enough not to know how to use a search engine.<br>
: <br>
: 2. Are you saying you are a moron?<br>
etc<br>
<br>
<br>
<br>
If you read the replies to your question carefully I think you'll see that E.Mantz was actually defending you!!<br>

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