Re: [R] Coefficient of Determination for nonlinear function

2011-03-05 Thread Uwe Wolfram
gful in nonlinear modeling. > > > > Yet another way in which linear and nonlinear models > > fundamentally differ. > > > > -- Bert > > > > On Fri, Mar 4, 2011 at 5:40 AM, Uwe Wolfram > > wrote: > > > Dear Subscribers, > >

[R] Coefficient of Determination for nonlinear function

2011-03-04 Thread Uwe Wolfram
but how can I compute sstot when there is no such thing than differing y_i. These are all one. Thus mean(y)=1. Therefore, sstot is 0. Thank you very much for your efforts, Uwe -- Uwe Wolfram Dipl.-Ing. (Ph.D Student) __ Institute of Orthopaedic

[R] Coefficient of Determination for nonlinear function

2011-03-04 Thread Uwe Wolfram
but how can I compute sstot when there is no such thing than differing y_i. These are all one. Thus mean(y)=1. Therefore, sstot is 0. Thank you very much for your efforts, Uwe -- Uwe Wolfram Dipl.-Ing. (Ph.D Student) __ Institute of Orthopaedic

Re: [R] How to plot Ellipsoid like function

2010-12-14 Thread Uwe Wolfram
with tics and such as usual R plots? 3. How can I save the scene to an image? pdf(...) ... dev.off() seems not to work on my machine. I am using Ubuntu on a 32 Bit Laptop. Thanks a million for your help! Uwe Am Montag, den 13.12.2010, 10:20 -0500 schrieb Duncan Mu

[R] How to plot Ellipsoid like function

2010-12-13 Thread Uwe Wolfram
olve the problem. Is there any function that can generate the surface for the given function such as ContourPlot3D in Mathematica. Thanks a million! Uwe -- Uwe Wolfram Dipl.-Ing. (Ph.D Student) __ Institute of Orthopaedic Research and Biomecha

[R] Plotting 3d surfaces

2010-12-09 Thread Uwe Wolfram
ContourPlot3D function. I would love to be able to plot this in R. However, I could not find something which could this. Thanks a million for the help! Uwe -- Uwe Wolfram Dipl.-Ing. (Ph.D Student) __ Institute of Orthopaedic Research and