Get coordinates on a plot by mouse-clicking.

`pasteLoc(nb, digits = c(3, 3))`

## Arguments

- nb
Number of positions.

- digits
2 integer indicating the number of decimal places
(respectively for x and y coordinates).

## Value

A list of coordinates. Note that if you don't put the result in a
variable, it returns as the command text for generating the list. This can
be useful to get coordinates by mouse-clicking once, but then using the code
for convenience and reproducibility.

## Examples

```
if (FALSE) {
plot(runif(20, max = 5000))
# note the negative number for the rounding of $y
coord <- pasteLoc(3, digits = c(2, -1))
text(coord, c("a", "b", "c"))
}
```