suppress console output in r markdown, but keep plot

Question

Hi I have the following markdown chunk:

```{r, echo=FALSE,warning=FALSE,message=FALSE,error=FALSE} lapply(obj,function(x) plot(x,main="some plot") box() axis(1,at=seq(0,25,by=1)) ``` 

The output is multiple plots. However I also get the console message in the pdf document underneath the plots.

<Plot 1> nice plot 1! <Plot 2> nice plot 2!  -- nasty horrible console output ## [[1]]  01.2882829   ## [[2]] 120.29393933 

I have tried echo/warning/error/message = FALSE, but neither of these suppress the console output

please help!

Answer 1

try this:

{r, echo=FALSE,results='hide',fig.keep='all'} lapply(obj,function(x) plot(x,main="some plot") box() axis(1,at=seq(0,25,by=1)) 

Answer 2

Wrapping any object in invisible will prevent automatically printing it.

You should be able to use

invisible(lapply(obj,function(x) plot(x,main="some plot"))) 

However the fact that echo=FALSE doesn't work suggests that there might be something else going on.