R> suppressMessages(qplot(1:10, 1:10, geom=c('point', 'smooth')))
`geom_smooth()` using method = 'loess' and formula 'y ~ x'
R> suppressWarnings(qplot(1:10, 1:10, geom=c('point', 'smooth')))
`geom_smooth()` using method = 'loess' and formula 'y ~ x'

I got the above message that I can not suppress. How to turn this message? (I must use qplot() instead of ggplot().)

CodePudding user response：

The issue is that the warning is coming from the printing/rendering, which doesn't happen inside qplot.

Two ways to fix this:

1. Add na.rm=TRUE:

   mt <- mtcars
   mt$cyl[3] <- NA
   qplot(cyl, disp, data=mt)
   # Warning: Removed 1 rows containing missing values (geom_point).
   qplot(cyl, disp, data=mt, na.rm=TRUE)
   ### (no warning)
   

2. Suppress the printing of it, not the qplot call.

   mt <- mtcars
   mt$cyl[3] <- NA
   gg <- qplot(cyl, disp, data=mt)
   print(gg)
   # Warning: Removed 1 rows containing missing values (geom_point).
   suppressWarnings(print(gg))
   ### (no warning)
   

CodePudding user response：

Maybe we can print the plot, and suppressMessages with it.

library(ggplot2)

suppressMessages(print(qplot(1:10, 1:10, geom=c('point', 'smooth'))))