Add a prefix to all rows in R

Question

I am trying to add a prefix `end` to all rows in a col `ensnp` in a dataframe `chrs`: ``` Name endsnp Bov001 Bov001 Bov002 Bov001 ``` My expected output must be like that: ``` Name endsnp Bov001 endBov001 Bov002 endBov001 ``` I have tried `chrs <- transform(chrs, endsnp = sprintf("end", endsnp))`, but I get this output: ``` Name endsnp Bov001 end Bov002 end ``` Any ideas about my error? Thank you!

Accepted Answer

Just use `paste0` to combine strings.

For example,

```
chrs$endsnp = paste0('end', chrs$endsnp)
```

or using `paste` and specifing the separator between the strings

```
chrs$endsnp = paste('end', chrs$endsnp, sep='')
```

Add a prefix to all rows in R

Solution

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