suppress console output in r markdown, but keep plot

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.

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))

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