---
title: "Primitve Data Types in R"
output: html_notebook
---

+ integer (subclass of numeric)
+ numeric (double)
+ complex
+ character ('a', "hello")
+ logical (TRUE/FALSE)
+ raw (byte level)


```{r}
v <- 1L
class(v)
v <- 1
class(v)
v <- 1 + 1i
class(v)
v <- "a string"
class(v)
v<-'a'
class(v)
v<-TRUE
class(v)
```

see also [R Manual](http://stat.ethz.ch/R-manual/R-devel/doc/manual/R-lang.html#Objects) for mode(), storage.mode(), typeof()

## Assignment: <- or =

```{r}
median(x = 1:10)
x   
## Error: object 'x' not found
```
see [R Manual](https://stat.ethz.ch/R-manual/R-patched/library/stats/html/median.html)

```{r}
median(x <- 1:10)
x    
## [1]  1  2  3  4  5  6  7  8  9 10
```
Scope!

```{r}
x <- 5
x
`<-`(x, 6)  #same thing
x

y = 5
y
`=`(y, 6)   #also the same thing
y
```
But!

```{r}
x <- y <- 5
# `<-`(x, `<-`(y, 5))
x
y
```

```{r}
x <- y = 5
x
y
# `=`(`<-`(x, y), 5) not `<-`(x, `=`(y, 5))
```

Why? Just because = is of lower precedence than <-.

```{r}
x = y = 5
# `=`(x, `=`(y, 5))
x
y
```