[R] Extracting numeric part from a string

[Christofer Bogaso]

Hi again,

I am struggling to extract the number part from below string :

"\"cm_ffm\":\"563.77\""

Basically, I need to extract 563.77 from above. The underlying number
can be a whole number, and there could be comma separator as well.

So far I tried below :

> library(stringr)

> str_extract("\"cm_ffm\":\"563.77\"", "[[:digit:]]+")

[1] "563"

>

However, above code is only extracting the integer part.

Could you please help how to achieve that. Thanks,