Hello,
I have a dataframe where I would like to change the string of certain
rows, essentially I am looking to remove some useless text from the
variables.
I tried with:
```
> df = data.frame(VAR = 1:3, VAL = c("value is blue", "Value is red", "empty"))
> df[df$VAL] = gsub("value is ", "", df$VAL, ignore.case = TRUE, perl = FALSE)
> df
VAR VAL value is blue Value is red empty
1 1 value is blue blue blue blue
2 2 Value is red red red red
3 3 empty empty empty empty
```
which is of course wrong because I was expecting
```
VAR VAL
1 1 blue
2 2 red
3 3 empty
```
What is the correct syntax in these cases?
Thank you
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