[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: Easy tutorial on how to make 3-dimensional graphics
From: |
Tetsuji \"Maverick\" Rai |
Subject: |
Re: Easy tutorial on how to make 3-dimensional graphics |
Date: |
Fri, 13 Jan 2006 00:55:32 +0900 |
User-agent: |
Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.9a1) Gecko/20060101 SeaMonkey/1.5a |
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1
Quentin Spencer wrote:
> Tetsuji "Maverick" Rai wrote:
>
>> Thank you for your help...
>>
>> I'm a newbie on octave.
>>
>> Now I've begun writing a small function to make a 3-d plot, but I'm
>> stuck at linspace(,,). Following function fails like
>> snip....
>
> The last argument to the linspace function must be >1. Type help
> linspace to learn why.
>
Thanks. I've got it to work w/o any modifications. It worked like a
charm (yes, it's like a charm to the "current" me :) ). I forgot I used
sombrero(32) or larger to test sombrero(n)....
>> Apparently x and z has a problem (I think I just borrowed this line from
>> sombrero(n)). I must be doing something wrong, but don't know what's
>> wrong.. Looking at sombrero(n), I see a single quote after
>> linspace(-8,8,n) and a period before slash '/' or hat '^'..... What are
>> they?? As for math, C++ is much easier to me... very unusual :(
>>
>>
>
> In octave, a*b represents a matrix multiplication of matrices a and b
> (which requires that they have the correct dimensions). That is
> different than element-wise multiplication of a and b, so that is
> represented with the symbol ".*". Since the operators / and ^ also have
> special meanings for matrix operations, if you want to divide all of the
> elements in one vector or matrix by all of the elements in another of
> the same dimensions, you use "./"; the same is true for exponents and
> the ".^" operator. The single quote represents the transpose of a matrix.
>
Thank you for your help! It's very clear! Then I need to read "375
page manual" online and ask here when necessary...
- -Tetsuji
- --
Tetsuji 'Maverick' Rai
main page http://maverick6664.bravehost.com/
PGP pubkey http://mav.atspace.com/maverick31337_at_gmail_dot_com.txt
PGP Key ID: 0x971E57CA
Key fingerprint: F790 28AF E95B 48C9 19AB 71FD 50B5 3572 971E 57CA
Aviation Jokes: http://www.geocities.com/tetsuji_rai/
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.2 (GNU/Linux)
Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org
iD8DBQFDxnvnULU1cpceV8oRAiGpAJwLH0Fg0NUwf9ZE7xB6OYyvNtiQpgCeIPsn
0dzJ0AXB5++9QttI+U7LvSk=
=cM8P
-----END PGP SIGNATURE-----
-------------------------------------------------------------
Octave is freely available under the terms of the GNU GPL.
Octave's home on the web: http://www.octave.org
How to fund new projects: http://www.octave.org/funding.html
Subscription information: http://www.octave.org/archive.html
-------------------------------------------------------------