r - Suppressing messages in Knitr / Rmarkdown

Question

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?

Answer 1

Ran into this problem as well, I would like to add that it should be warning = FALSE, not warnings = FALSE