|
From: | Gene Partlow |
Subject: | Unable to write algebraic equations in correct Oct. syntax |
Date: | Wed, 7 Jan 2009 00:25:35 -0800 |
Hi all... I am having terrible trouble forming correct Octave syntax. I am sending this to you in hopes that someone might help me with re- phrasing rather standard nonlinear algebraic equations into a form suitable for the online Octave solver website at http://www.online-utility.org/math/math_calculator.jsp [Yes... I know that many of you would urge that I get hold of the new Octave 3.0.3 instead of using the old on-line site... but regardless, when I try to put the equations in 0 = f(x,y,v) form, whatever I do results in "errors".] I need Octave to do a numerical analysis on a block of equations. My problem is that so far I've been unable to translate the block of ten such equations into a form which is 'digestible' for the Octave calculator on that site. For myself, the Octave Tutorial has been very limited. I am at my wit's end and my brain is going Ffssszzt! BelowI include just a few equations (involving gravitational field potentials)
in the hope that someone might take pity and translate one or more of them into Octave compatible form. Then I would just analyze how you wrote it and then apply that lesson to the rest of the block of equations. Perhaps then Octave could solve them. My equations are in LaTeXiT, using a MacTex.dmg software. In case this website does not support LaTeXiT, I also include the clumsier ASC II version for each one. (1)
pastedGraphic40.pdf
Description: Adobe PDF document
or equivalently... (v_1d)^2 = [ (Fy)^2 / (Ex+Fy) ] [ C / (D+Gx^3 + Hy^3) ] (2)
pastedGraphic46.pdf
Description: Adobe PDF document
pastedGraphic48.pdf
Description: Adobe PDF document
or... B*sqrt | (v_1a)^2 + (v_1b)^2 + (v_1c)^2 - (v_1d)^2 | = A*sqrt | (v_2a)^2 + (v_2b)^2 + (v_2c)^2 - (v_2d)^2 | where |...| = absolute value, and *= 'times' . (3)
pastedGraphic38.pdf
Description: Adobe PDF document
or... (v_1c)^2 = [ A^2 / (A + Ex) ] [ C / ( D + Gx^3 ) ] x, y and the various v's are the unknowns. The capital letters are just large coefficients (eg: C = 6.67428*10^-11 , the Newtonian gravitational constant.) The others are mainly astronomical masses and distances. Even if you can only translate just one of these into compatible form, it would help me very much to study it. Feel free to email me at address@hidden Thanks for your time, Gene Partlow Ben Lomond, Calif.
[Prev in Thread] | Current Thread | [Next in Thread] |