Rstudio is duplicating commands in the command line

Question

Having a weird problem in R that seems to have come out of nowhere... output in the RStudio terminal is repeated without me asking for it... i.e.,

> 3+4
         


        

Answer 1

I had the same problem in Rstudio 0.98.501. I restarted the R session and it disappeared. It is running the same command twice, which can not only slow things down but give erroneous results if you are transforming an object into the same name.