How to hide or disable in-function printed message
25,764
Solution 1
You can use capture.output
with invisible
> invisible(capture.output(y <- ff(2)))
> y
[1] 4
or sink
> sink("file")
> y <- ff(2)
> sink()
> y
[1] 4
Solution 2
Here's a nice function for suppressing output from cat()
by Hadley Wickham:
quiet <- function(x) {
sink(tempfile())
on.exit(sink())
invisible(force(x))
}
Use it like this:
y <- quiet(ff(5))
Source: http://r.789695.n4.nabble.com/Suppressing-output-e-g-from-cat-td859876.html
Solution 3
You should also check out purrr::quietly()
.
ff <- function(x) {
cat(x, "\n")
x^2
}
purrr::quietly(ff)(7)$result
#> [1] 49
Created on 2020-09-10 by the reprex package (v0.3.0)
Author by
David Z
Updated on February 11, 2022Comments
-
David Z over 2 years
Suppose I have a function such as:
ff <- function(x) { cat(x, "\n") x^2}
And run it by:
y <- ff(5) # 5 y # [1] 25
My question is how to disable or hide the
5
printed fromcat(x, "\n")
such as:y <- ff(5) y # [1] 25