First Steps in R

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# First Steps in R
## Dr. Mine Dogucu
]

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## Object assignment operator

```r
birth_year <- 1950
```

|                            | Windows        | Mac              |
|----------------------------|----------------|------------------|
| Shortcut     | Alt + -        | Option + -       |

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class:

## R is case-sensitive

```r
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.

```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

```r
do(something)
```

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

```r
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.

```r
?c
```

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## tidyverse_style_guide

>canyoureadthissentence?

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```r
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