关闭 R 笔记本中的警告

Question

I am working with Jupyter in R environment. I hate to see warnings which came from different R packages. In order to do that I try same line from Python code:

import warnings
warnings.filterwarnings('ignore') 

But warnings are still there. So can anybody help me how to solve this problem?

Answer 1

You can use options(warn=-1) in an R Script to turn off warning messages. But this might not be an good idea.

To turn warnings back on, use

options(warn=0)

Hope this solves your problem.

Answer 2

While you can turn off warnings globally, it's usually not a good idea. Fortunately, there are ways to suppress output for specific instances.

Some alternatives that work in a Jupyter environment are:

# suppress conflict warnings at package load
library(dplyr, warn.conflicts=FALSE)

# suppress startup messages at package load
suppressPackageStartupMessages(library(tidyverse))

# suppress warnings
suppressWarnings( as.numeric(c('0', '1', '2', 'three')) )

# suppress messages
suppressMessages(df %>% group_by(location) %>% summarize(revenue))