How to suppress warnings with ggrepel

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ggrepel allows to avoid overlapping text labels by repeling labels too near from each other.
The algorithm depends on viewing window size, and a callback occurs when window size is changed.
If the algorithm doesn't manage to avoid overlaps for a given window size, warnings are issued :

Warning messages:
1: ggrepel: 178 unlabeled data points (too many overlaps). Consider increasing max.overlaps

I would like to suppress these warnings, independently of the value of max.overlaps, because they might come delayed and out of context.

The reason for the delay is probably a callback after first print or after changing viewing window width, see example below :

library(ggplot2)
library(ggrepel)

N <- 50
data <- data.frame(x=1:N,y=rep(1,N),label =  paste0("Text",1:N))

ggplot(data)+
  geom_point(aes(x=x,y=y))+
  geom_text_repel(aes(x=x,y=y,label=label),hjust=0, vjust=0, box.padding = 0.5, max.overlaps = 20)

# If the viewing window width is OK, no warning!

#  Execute anything in console
1
#[1] 1
# This is OK!

enter image description here

# Now reduce window width with mouse

# No warning yet

# Execute anything in console
1
# Warning messages:
#   1: ggrepel: 41 unlabeled data points (too many overlaps). Consider increasing max.overlaps 
# 2: ggrepel: 41 unlabeled data points (too many overlaps). Consider increasing max.overlaps 
# 3: ggrepel: 41 unlabeled data points (too many overlaps). Consider increasing max.overlaps 
# 4: ggrepel: 47 unlabeled data points (too many overlaps). Consider increasing max.overlaps 
# 5: ggrepel: 47 unlabeled data points (too many overlaps). Consider increasing max.overlaps 
# 6: ggrepel: 47 unlabeled data points (too many overlaps). Consider increasing max.overlaps 
# 7: ggrepel: 47 unlabeled data points (too many overlaps). Consider increasing max.overlaps 
# 8: ggrepel: 47 unlabeled data points (too many overlaps). Consider increasing max.overlaps 
# 9: ggrepel: 47 unlabeled data points (too many overlaps). Consider increasing max.overlaps 
#[1] 1

enter image description here

I tried suppressWarnings and withCallingHandlers to no avail:

withCallingHandlers(
  suppressWarnings(ggplot(data)+
    geom_point(aes(x=x,y=y))+
    geom_text_repel(aes(x=x,y=y,label=label),hjust=0, vjust=0, box.padding = 0.5, max.overlaps = 20)
    )
,  warning=function(w) {
  if( any( grepl( "ggrepel", w) ) ) invokeRestart( "muffleWarning" )
})
2 Answers

You could ignore the warning messages by setting the global warning level as below:
options(warn=-1)

You can do this by setting max overlaps:

options(ggrepel.max.overlaps = Inf)
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