How can two strings be concatenated?

Question

How can I concatenate (merge, combine) two values? For example I have: ``` tmp = cbind("GAD", "AB") tmp # [,1] [,2] # [1,] "GAD" "AB" ``` My goal is to concatenate the two values in "tmp" to one string: ``` tmp_new = "GAD,AB" ``` Which function can do this for me?

Accepted Answer

```
paste()
```

is the way to go. As the previous posters pointed out, paste can do two things:

concatenate values into one "string", e.g.

```
> paste("Hello", "world", sep=" ")
[1] "Hello world"
```

where the argument `sep` specifies the character(s) to be used between the arguments to concatenate, or collapse character vectors

```
> x <- c("Hello", "World")
> x
[1] "Hello" "World"
> paste(x, collapse="--")
[1] "Hello--World"
```

where the argument `collapse` specifies the character(s) to be used between the elements of the vector to be collapsed.

You can even combine both:

```
> paste(x, "and some more", sep="|-|", collapse="--")
[1] "Hello|-|and some more--World|-|and some more"
```

How can two strings be concatenated?

Solution

Problem