Packages/plots Flashcards
Install packages?
install.packages(“”)
Confirmation message of loading the package/load installed package?
require()
No confirmation message but load package?
library()
Loading many packages simultaneously with pacman?
pacman : : o_load()
Clean up a package with pacman?
p_unload()
Clean up base packages?
detach (“”, unload = TRUE)
Get help in something?
?function
Plotting on a specific categorical variable?
plot(dataset$Var)
Plotting a quantitative variable?
plot(dataset$Var.Var)
Plot with two variables?
plot(dataset$Var, dataset$Var)
Plot the entire dataset?
plot(dataset)
Plotting mathematical formulas?
plot(function, min, max)
Bar plot?
barplot(
Histogram?
hist(dataset)
Put graphs in x rows and y columns?
par(mfrow = c(x, y))
Histogram with a selector (restriction)?
hist(dataset$Var [dataset$var == “var”])
What returns the first or last parts of a vector, matrix, table, data frame or function?
head()
How to figure out class or data type for each column?
sapply(data, class)
how to make a table in R a database?
attach(var)
Reading text file in R?
read.table(“filename.txt”)
