I have 2 concerns,
1. Sometimes when I try to plot I get the following error. How can I solve it?
Evaluation error: unable to start png() device.
2. Ctrl + Enter doesn't run the current line of R code if it has a commend at the end. For example,
rnorm(100) # test
Ctrl + Enter works for the first line of code, but not for the 2nd line.