Re: [R] Need help in calculating studentized residuals/leverage values of non-linear model [nls()]

er Menne , r-h...@stat.math.ethz.ch Message-ID: <20090406153907.97vpo.402395.r...@mp16> Content-Type: text/plain; charset=utf-8 Is the output of residuals() the studentized residuals or just the residuals? Dieter Menne wrote: > Giam Xingli nus.edu.sg> writes: > > >

Re: [R] Need help in calculating studentized residuals/leverage values of non-linear model [nls()]

Hi Kevin, I need the studentized residuals. In linear models, they can be computed by using rstudent( ) function, but there seems to be no such function for nls( ) output. Alternatively, it'll be helpful if I could compute the leverage values. Best, Xingli __

[R] Need help in calculating studentized residuals/leverage values of non-linear model [nls()]

Hi there, I hope I can get advice regarding the calculation of leverage values or studentized residual values of a non-linear regression model. It seems like rstudent() does not work on a nls object. Many thanks in advance! Best regards, Xingli

[R] Identifying a subset of observations on a 3d-scatter plot using cloud()

Hello everyone, This is my first post to the mailing list, so I hope I am posting my message the correct way. I am trying to present my dataset in a 3d scatterplot using cloud() in the {lattice} package. I hope to explicitly identify a subset of my observations. The observations in this subs