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Diffstat (limited to 'trunk/chemCal/R/calplot.R')
-rw-r--r-- | trunk/chemCal/R/calplot.R | 80 |
1 files changed, 0 insertions, 80 deletions
diff --git a/trunk/chemCal/R/calplot.R b/trunk/chemCal/R/calplot.R deleted file mode 100644 index 6aed9c0..0000000 --- a/trunk/chemCal/R/calplot.R +++ /dev/null @@ -1,80 +0,0 @@ -calplot <- function(object, - xlim = c("auto", "auto"), ylim = c("auto", "auto"), - xlab = "Concentration", ylab = "Response", alpha = 0.05, - varfunc = NULL) -{ - UseMethod("calplot") -} - -calplot.default <- function(object, - xlim = c("auto","auto"), ylim = c("auto","auto"), - xlab = "Concentration", ylab = "Response", - alpha=0.05, varfunc = NULL) -{ - stop("Calibration plots only implemented for univariate lm objects.") -} - -calplot.lm <- function(object, - xlim = c("auto","auto"), ylim = c("auto","auto"), - xlab = "Concentration", ylab = "Response", alpha=0.05, - varfunc = NULL) -{ - if (length(object$coef) > 2) - stop("More than one independent variable in your model - not implemented") - - if (alpha <= 0 | alpha >= 1) - stop("Alpha should be between 0 and 1 (exclusive)") - - m <- object - level <- 1 - alpha - y <- m$model[[1]] - x <- m$model[[2]] - if (xlim[1] == "auto") xlim[1] <- 0 - if (xlim[2] == "auto") xlim[2] <- max(x) - xlim <- as.numeric(xlim) - newdata <- list( - x = seq(from = xlim[[1]], to = xlim[[2]], length=250)) - names(newdata) <- names(m$model)[[2]] - if (is.null(varfunc)) { - varfunc <- if (length(m$weights)) { - function(variable) mean(m$weights) - } else function(variable) rep(1,250) - } - pred.lim <- predict(m, newdata, interval = "prediction", - level=level, weights.newdata = varfunc(m)) - conf.lim <- predict(m, newdata, interval = "confidence", - level=level) - yrange.auto <- range(c(0,pred.lim)) - if (ylim[1] == "auto") ylim[1] <- yrange.auto[1] - if (ylim[2] == "auto") ylim[2] <- yrange.auto[2] - plot(1, - type = "n", - xlab = xlab, - ylab = ylab, - xlim = as.numeric(xlim), - ylim = as.numeric(ylim) - ) - points(x,y, pch = 21, bg = "yellow") - matlines(newdata[[1]], pred.lim, lty = c(1, 4, 4), - col = c("black", "red", "red")) - if (length(object$weights) > 0) { - legend(min(x), - max(pred.lim, na.rm = TRUE), - legend = c("Fitted Line", "Confidence Bands"), - lty = c(1, 3), - lwd = 2, - col = c("black", "green4"), - horiz = FALSE, cex = 0.9, bg = "gray95") - } else { - matlines(newdata[[1]], conf.lim, lty = c(1, 3, 3), - col = c("black", "green4", "green4")) - legend(min(x), - max(pred.lim, na.rm = TRUE), - legend = c("Fitted Line", "Confidence Bands", - "Prediction Bands"), - lty = c(1, 3, 4), - lwd = 2, - col = c("black", "green4", "red"), - horiz = FALSE, cex = 0.9, bg = "gray95") - } -} |