ggplot or Lattice Fit Line in R

fit.R

ols <- lm(Temp ~ Solar.R,
  data = airquality)

summary(ols)

str(ols)

plot(Temp ~ Solar.R,
  data = airquality)
abline(ols)

library(ggplot2)
# ggplot(data = airquality,
#     aes(Solar.R, Temp)) + 
#   geom_point(pch = 19) + 
#   geom_abline(intercept = ols$coefficients[1],
#     slope = ols$coefficients[2])
ggplot(data = airquality,
    aes(Solar.R, Temp)) + 
  geom_point(pch = 19) + 
  geom_smooth(method = lm,
    se = FALSE)

library(lattice)

xyplot(Temp ~ Solar.R,
  data = airquality,
  type = c("p", "r"))