Select dataframe row containing a digit

On Wed, 30 Nov 2022 13:40:50 +0100

Hello,
I have a data frame where some lines containing strings including
digits. How do I select those rows and change their values?

In essence, I have a data frame with different values assigned to the
column "val". I am formatting everything to either "POS" and "NEG",
but values entered as number should get the value "NUM".
How do I change such values?

What I do in such circumstances:

suppressWarnings(X$val[!is.na(as.numeric(X$val))] <- "NUM")

The "suppressWarnings()" bit is just included due to my OCD.

This avoids fooling about with regular expressions, which always
requires a huge amount of trial and error, and a great diminishment of
the amount of hair on one's head (as a result of tearing out).

Note that I have changed the name of your data frame from "df" to "X",
since df() is a built-in R function (density of the F-distribution).

See fortunes::fortune("might clash").

cheers,

Rolf Turner

Honorary Research Fellow
Department of Statistics
University of Auckland
Phone: +64-9-373-7599 ext. 88276