R - Markdown avoiding package loading messages

Question

I have been using Knitr via R-Studio  and think it is pretty neat  I have a minor issue though  When I source a file in an R-Chunk  the knitr output includes external comments as follows      FALSE Loading required package  ggplot2   FALSE Loading required package  gridExtra   FALSE Loading required package  grid   FALSE Loading required package  VGAM   FALSE Loading required package  splines   FALSE Loading required package  stats4   FALSE Attaching package   VGAM    FALSE The following object s  are masked from  package stats4     I have tried to set R-chunk options in various ways but still didn t seem to avoid the problem        r echo FALSE  cache FALSE  results FALSE  warning FALSE  comment FALSE  warning FALSE   source  C  Rscripts source R           Is there any way to comment out these messages

User · Accepted Answer

You can use include FALSE to exclude everything in a chunk       r include FALSE  source  C  Rscripts source R         If you only want to suppress messages  use message FALSE instead       r message FALSE  source  C  Rscripts source R

User · Answer

This is an old question  but here s another way to do it   You can modify the R code itself instead of the chunk options  by wrapping the source call in suppressPackageStartupMessages    suppressMessages    and or suppressWarnings    E g       r echo FALSE  suppressWarnings suppressMessages suppressPackageStartupMessages   source  C  Rscripts source R            You can also put those functions around your library   calls inside the  source R  script

User · Answer

r results  hide   message FALSE  warning FALSE  library RJSONIO  library AnotherPackage        see Chunk Options in the Knitr docs

User · Answer

My best solution on R Markdown was to create a code chunk only to load libraries and exclude everything in the chunk    r results  asis   echo FALSE  include FALSE   knitr  opts chunk set echo   TRUE  warning FALSE   formating tables library xtable    data wrangling library dplyr    text processing library stringi

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