## ----echo=FALSE, message=FALSE------------------------------------------------
library(olsrr)
library(ggplot2)
library(gridExtra)
library(nortest)
library(goftest)

## ----qqresid, fig.width=5, fig.height=5, fig.align='center'-------------------
model <- lm(mpg ~ disp + hp + wt + qsec, data = mtcars)
ols_plot_resid_qq(model)

## ----normtest-----------------------------------------------------------------
model <- lm(mpg ~ disp + hp + wt + qsec, data = mtcars)
ols_test_normality(model)

## ----corrtest-----------------------------------------------------------------
model <- lm(mpg ~ disp + hp + wt + qsec, data = mtcars)
ols_test_correlation(model)

## ----rvsfplot, fig.width=5, fig.height=5, fig.align='center'------------------
model <- lm(mpg ~ disp + hp + wt + qsec, data = mtcars)
ols_plot_resid_fit(model)

## ----residhist, fig.width=5, fig.height=5, fig.align='center'-----------------
model <- lm(mpg ~ disp + hp + wt + qsec, data = mtcars)
ols_plot_resid_hist(model)