diff options
Diffstat (limited to 'R/lod.R')
-rw-r--r-- | R/lod.R | 25 |
1 files changed, 25 insertions, 0 deletions
@@ -0,0 +1,25 @@ +lod <- function(object, ..., alpha = 0.05, k = 1, n = 1, w = "auto") +{ + UseMethod("lod") +} + +loq <- function(object, ..., alpha = 0.05, k = 3, n = 1, w = "auto") +{ + lod(object = object, alpha = alpha, k = k, n = n, w = w) +} + +lod.default <- function(object, ..., alpha = 0.05, k = 1, n = 1, w = "auto") +{ + stop("lod is only implemented for univariate lm objects.") +} + +lod.lm <- function(object, ..., alpha = 0.05, k = 1, n = 1, w = "auto") +{ + f <- function(x) { + y <- predict(object, data.frame(x = x)) + p <- inverse.predict(object, rep(y, n), ws = w, alpha = alpha) + (p[["Prediction"]] - k * p[["Confidence"]])^2 + } + tmp <- optimize(f,interval=c(0,max(object$model$x))) + return(tmp$minimum) +} |