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Thread Subject:
For dissertation

Subject: For dissertation

From: Su Su Khaing

Date: 7 Jul, 2011 17:09:09

Message: 1 of 3

Hello,

I need to use matlab for my dissertation but I am not familiar with matlab.
My dissertation title is "Spherical Parameterization for 3d mesh".
I need to solve two equations by using matlab
1) Lx=0 (L is n by n sparse matrix)
2) xi^2+ yi^2+zi^2=1 , i= 1,2,3....,n (n nonlinear equation)

I'd like to know which matlab function is to be satisfy this two equations.

Subject: For dissertation

From: Matt J

Date: 7 Jul, 2011 17:42:09

Message: 2 of 3

"Su Su Khaing" <susukhaing18@gmail.com> wrote in message <iv4p7l$sd0$1@newscl01ah.mathworks.com>...
> Hello,
>
> I need to use matlab for my dissertation but I am not familiar with matlab.
> My dissertation title is "Spherical Parameterization for 3d mesh".
> I need to solve two equations by using matlab
> 1) Lx=0 (L is n by n sparse matrix)
> 2) xi^2+ yi^2+zi^2=1 , i= 1,2,3....,n (n nonlinear equation)
>
> I'd like to know which matlab function is to be satisfy this two equations.


NULL (or EIG)

Subject: For dissertation

From: Roger Stafford

Date: 7 Jul, 2011 18:09:09

Message: 3 of 3

"Su Su Khaing" <susukhaing18@gmail.com> wrote in message <iv4p7l$sd0$1@newscl01ah.mathworks.com>...
> Hello,
>
> I need to use matlab for my dissertation but I am not familiar with matlab.
> My dissertation title is "Spherical Parameterization for 3d mesh".
> I need to solve two equations by using matlab
> 1) Lx=0 (L is n by n sparse matrix)
> 2) xi^2+ yi^2+zi^2=1 , i= 1,2,3....,n (n nonlinear equation)
>
> I'd like to know which matlab function is to be satisfy this two equations.
- - - - - - - - - -
  You haven't given us enough information. What are the dimensions of 'x' in Lx = 0? Is it n by 3 with its three columns corresponding to the xi, yi, and zi of equations 2)? If so, you would have 4*n equations and only 3*n unknowns which places a serious constraint on matrix L. How do these equations relate to 3D meshes? Please give a lot more information.

Roger Stafford

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