abline_range: Add a line to a plot

In RemkoDuursma/nlshelper: Convenient Functions for Non-Linear Regression

Description

As abline, but with from and to arguments. If a fitted linear regression model is used as asn argument, it uses the min and max values of the data used to fit the model.

Usage

abline_range(a = NULL, b = NULL, reg = NULL, from = NULL, to = NULL,
  ...)

Arguments

a	Intercept (optional)
b	Slope (optional)
reg	A fitted linear regression model (output of lm).
from	Draw from this X value
to	Draw to this x value
...	Further parameters passed to segments

See Also

See add_regres_line for adding a regression line with a confidence interval

Examples

# Add a line manually
with(mtcars, plot(1/wt, mpg, xlim=c(0,0.8), ylim=c(0,40)))
abline_range(0,50,from=0.2, to=0.6)

# Add a line across the range of the data from a regression object
with(mtcars, plot(1/wt, mpg, xlim=c(0,0.8), ylim=c(0,40)))
fit <- lm(mpg ~ I(1/wt), data=mtcars)
abline_range(fit)

RemkoDuursma/nlshelper documentation built on May 9, 2019, 9:39 a.m.