06-strings.Rmd

# Working with Strings

First load the package.

```{r}
library(stringr)

```

## String combine with `str_c`
```{r}
our_string = c("With", "great", "power", "comes", "great", "responsibility")

str_length(our_string)
```
```{r}
str_c("Hello", "World", sep = " ")
str_c(our_string)
```
```{r}
str_c(our_string,  collapse = " ")
```
## Substrings  with `str_sub`
```{r}
str_sub(our_string, 1, 1)
str_sub(our_string, 1, 2)
str_sub(our_string, -1, -1)
str_sub(our_string, -2, -1)
```
## Capitalize or not
```{r}
str_to_lower(our_string)
str_to_upper(our_string)
str_to_title(our_string)

# specify locale to be sure that behavior is consistent with locale option
str_to_title(our_string, locale = "en")
```
```{r}
# capitalize first letter
str_sub(our_string, 1, 1) <- str_to_upper(str_sub(our_string, 1, 1))
our_string
```
## String sort
```{r}
str_sort(our_string)
```
## Handling NAs
```{r}
another_string = c(NA, "Hello", "World")
str_c(another_string, collapse = " ")
```