First Steps in R

Dr. Mine Dogucu

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hello woRld

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R review

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Object assignment operator

birth_year <- 1950

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Object assignment operator

birth_year <- 1950

	Windows	Mac
Shortcut	Alt + -	Option + -

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R is case-sensitive

my_age <- 2020 - birth_year
My_age

## Error in eval(expr, envir, enclos): object 'My_age' not found

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R is case-sensitive

my_age <- 2020 - birth_year
My_age

## Error in eval(expr, envir, enclos): object 'My_age' not found

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If something comes in quotes, it is not defined in R.

ages <- c(25, my_age, 32)
names <- c("Menglin", "Mine", "Rafael")
data.frame(age = ages, name = names)

##   age    name
## 1  25 Menglin
## 2  70    Mine
## 3  32  Rafael

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Vocabulary

do(something)

do() is a function;
something is the argument of the function.

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Vocabulary

do(something)

do() is a function;
something is the argument of the function.

do(something, colorful)

do() is a function;
something is the first argument of the function;
colorful is the second argument of the function.

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Getting Help

In order to get any help we can use ? followed by function (or object) name.

?c

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tidyverse_style_guide

canyoureadthissentence?

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tidyverse_style_guide

canyoureadthissentence?

age <- c(6, 9, 15)
data.frame(age_kid = age)

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tidyverse_style_guide

canyoureadthissentence?

age <- c(6, 9, 15)
data.frame(age_kid = age)

After function names do not leave any spaces.

Before and after operators (e.g. <-, =) leave spaces.

Put a space after a comma, not before.

Object names are all lower case, with words separated by an underscore.

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RStudio Setup
  
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Help

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