Suppressing messages in Knitr / Rmarkdown
knitr, r, r-markdown
Solution
Try using `invisible` to suppress those types of output.
{r} invisible(getSymbols("^RUT")) chart.TimeSeries(RUT) invisible(dev.off())
`
From the help page for `?invisible`:
This function can be useful when it is desired to have functions return values which can be assigned, but which do not print when they are not assigned.
Neither of these are "messages" or "warnings", but actual output values. You'll see that the messages for `getSymbols` are, indeed, suppressed by knitr in the output.
Problem
Here is the code for my RMarkdown file: ```` ```{r echo=FALSE, message=FALSE} opts_chunk$set(comment = NA, echo=FALSE, message = FALSE, warnings = FALSE) options("getSymbols.warning4.0"=FALSE) Sys.setenv(TZ = "GMT") library(quantmod) library(xtable) library(PerformanceAnalytics) ``` ```{r} getSymbols("^RUT") chart.TimeSeries(RUT) dev.off() ``` ```` Despite settings `message = FALSE, warnings = FALSE`, I am still getting output messages in the HTML file when I run `getSymbols()` and `dev.off()`. Their respective outputs are: ``` [1] "RUT" ``` and ``` null device 1 ``` How do I suppress these messages?