Formatting All decimal places in R

Question

How can I specify, using one command, the number of digits displayed during an entire R session? That is to say, how can I get the value `0` to always display as `0.0`? I've tried the command `options(digits=1)`, but `0` still displays as `0` and not `0.0`. I'm really trying to avoid wrapping each command in something like `print(ifelse(x==0,"0.0",x))`. It would also be nice if the solution to this problem made, say, `5` show up as `5.0`.

Accepted Answer

I'm not sure if there is an `options` for trailing 0's. One possibility would be to have your own print.numeric and print.integer functions.

```
print.integer <- print.numeric <- function(..., digs=1)   {
    print(format(as.numeric(...), nsmall=digs), quote=F)
}
```

It still requires `print`, but is neater

```
> print(-1:5)
[1] -1.0  0.0  1.0  2.0  3.0  4.0  5.0
```

Alternatively, you can use the `nsmall` argument in format directly.

```
mat <- matrix(as.numeric(rep(0:3, 5)), ncol=4)
print(format(mat, nsmall=2), quote=F)
```

Formatting All decimal places in R

Solution

Problem