Can I silence these two ggplot outputs?

Question

I'm running a command in a function and I'd like to silence the output.

In particular, there's these two outputs that I'd like to silence

summarise()` ungrouping output (override with `.groups` argument)
`stat_bin()` using `bins = 30`. Pick better value with `binwidth`.

One happens when I use group_by() %>% summarize() and the second happens when I use geom_histogram(). They're not warnings, so I don't think suppressWarnings will work.

Are you using this in markdown? You can suppress those messages by setting `warning = FALSE` and `messages = FALSE` in your chunk. — Ronak Shah, Oct 25 '20 at 01:53
The bin width one should go away if you set your own bin widths. It is notifying you of what bin width was selected automatically. — Tanner33, Oct 25 '20 at 02:01
Specify .groups in summarise(). E.g., `iris %>% group_by(Species) %>% summarise(.groups = "keep")` — LC-datascientist, Oct 25 '20 at 02:08
Oh the makes sense. In that case, I'll try adding ungroup() too — tadon11Aaa, Oct 25 '20 at 02:09
Will the binwidth always be 30? I'm wondering if there's logic there that I'll override — tadon11Aaa, Oct 25 '20 at 02:10
Here is the documentation. Go to geom_histogram help for more details."The default is to use the number of bins in bins, covering the range of the data. You should always override this value, exploring multiple widths to find the best to illustrate the stories in your data." — Tanner33, Oct 25 '20 at 02:11
In that case, I will keep it as is and try suppress warnings() — tadon11Aaa, Oct 25 '20 at 02:12
`bins = 30` is the default. You can change `bins` or `binwidth`. Run `?stat_bin()` for details. — LC-datascientist, Oct 25 '20 at 02:12

score 1 · Accepted Answer · answered Oct 25 '20 at 02:47

You can set bins manually to override that message from being displayed regarding geom_histogram.

To avoid message from summarise use .groups == 'keep' as mentioned by @ LC-datascientist or use suppressMessages.

library(dplyr)
library(ggplot2)

suppressMessages(mtcars %>%
  group_by(cyl, am) %>%
  summarise(mpg = sum(mpg)) %>%
  ggplot() + aes(am) + geom_histogram(bins = 10))

Can I silence these two ggplot outputs?

1 Answers1