search for: supersmoother

I used the supersmoother function in the modreg package as follows: super <- supsmu(ilogemp,award) Then I decided that I might want additional explanatory variables (other than ilogemp) in my model. The ppr function in modreg seemed a logical extension of supsmu from univariate to multidimensional explanatory variabl...

...AMMA / (XVAR^GAMMA + C50^GAMMA)) ## alternate version of formula FORMULA <- as.formula(YVAR ~ EMAX - EFFECT / (1 + (C50/XVAR)^GAMMA)) FIT <- nls(FORMULA, start=START, control=CONTROL, trace=T) If GAMMA equals 10-80, nls converges successfully and the fit tracks the fit from a smoother (Supersmoother). However, if I attempt to estimate GAMMA using: START <- list(EMAX=INITEMAX, EFFECT=INITEFFECT, C50=INITC50, GAMMA=INITGAMMA) GAMMA increases rapidly to > 500 and nls terminates with: Error in chol2inv(object$m$Rmat()) : element (4, 4) is zero, so the inverse cannot be computed In...

...tion Pursuit Regression predict.loess Predict Loess Curve or Surface predict.smooth.spline Predict from Smoothing Spline Fit scatter.smooth Scatter Plot with Smooth Curve Fitted by Loess smooth.spline Fit a Smoothing Spline supsmu Friedmans's SuperSmoother Check on any Comprehensive R Archive Network (CRAN) site for information on obtaining R libraries and subscribing to the lists. The master CRAN site is http://www.ci.tuwien.ac.at/R/ -.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.- r-help mailing list -- Read...

...tion Pursuit Regression predict.loess Predict Loess Curve or Surface predict.smooth.spline Predict from Smoothing Spline Fit scatter.smooth Scatter Plot with Smooth Curve Fitted by Loess smooth.spline Fit a Smoothing Spline supsmu Friedmans's SuperSmoother Probably only bug-fixing left, but I would welcome comments about the extent of the loess functionality. lqs.tar.gz: ========== cov.rob Robust Estimation of Multivariate Location and Scatter lqs Resistant Regression by Least Trim...