regrresidplot
Draw a plot of y vs x from a linear model object, with residuals indicated by lines or squares.
Draw a plot of response vector y vs predictor variable x from a linear model object all of whose predictors are a function of x, with residuals indicated by lines or squares.
- Keywords
- hplot
Usage
regrresidplot(x, y, resid.plot = FALSE, fit.line=TRUE,
lm.object = lm(y ~ x), x.name = names(lm.object$model)[2],
col = trellis.par.get()$plot.symbol$col,
col.yhat = NULL, col.fit = "gray80", col.resid = "gray40", ...)panel.residSquare(x, y, yhat, resid.plot = FALSE, col = "black", ...)
Arguments
- x
Predictor variable. Must be a vector or a single column.
- y
Response variable. Must be a vector or a single column.
- yhat
Predicted value of y based on the model in
lm.objectover thexlimrange of the plot.- resid.plot
Logical or character. Should the residuals from
lm.objectbe plotted, and how? Default isFALSE. Alternatives areTRUEfor lines and"square"for squares.- fit.line
Logical. Should the fitted regression line from
lm.objectbe plotted? DefaultTRUE.- lm.object
Linear model object of y against some function of x. The default value is the simple linear regression of
lm(y ~ x).- x.name
Name of $x$-variable to be used in the construction of the fitted values.
- col
Color of observed points.
- col.yhat
Color of fitted points. Default is
NULL.- col.fit
Color of fitted line.
- col.resid
Color of residuals, either lines or squares depending on the value of
resid.plot.- …
Additional arguments to the panel functions.
Value
regrresidplot returns a "trellis" object.
panel.residSquare is a panel function with no useful returned value.
Examples
# NOT RUN {
data(fat)
fat.lm <- lm(bodyfat ~ abdomin, data=fat)
AA <- regrresidplot(fat$abdomin, fat$bodyfat, xlim=c(70,185), ylim=c(0,50))
BB <- regrresidplot(fat$abdomin, fat$bodyfat, xlim=c(70,185), ylim=c(0,50),
resid.plot="line")
CC <- regrresidplot(fat$abdomin, fat$bodyfat, xlim=c(70,185), ylim=c(0,50),
resid.plot="square")
update(between=list(y=1),
c("Residuals Not Displayed"=AA,
"Residual Lines"=BB,
"Residual Squares"=CC, layout=c(1,3)))
# }