R functions (D)

The list of new R functions introduced in this Survey data analysis lab component are below:

Function_name	Package_name	Use
AIC	base/stats	To extract the AIC value of a model
as.character	base	To create a character vector
as.numeric	base	To create a numeric vector
eval	base	To evaluate an expression
fitted	base/stats	To extract fitted values of a model
ls	base	To see the list of objects
psrsq	survey	To compute the Nagelkerke and Cox-Snell pseudo R-squared statistics for survey data
regTermTest	survey	To test for an additional variable in a regression model
residuals	base/stats	To extract residuals of a model
stepAIC	MASS	To choose a model by stepwise AIC
step	base/stats	To choose a model by stepwise AIC but it can keep the pre-specified variables in the model
summ	jtools	To show/publish regression tables
svyboxplot	survey	To produce a box plot for survey data
svyby	survey	To see the summary statistics for a survey design
svychisq	survey	To test the bivariate assocaition between two categorical variables for survey data
svyCreateTableOne	tableone	To create a frequency table with a survey design
svydesign	survey	To create a design for the survey data analysis
svyglm	survey	To run design-adjusted generalized linear models
update	base/stats	To update and re-fit a regression model