[R] three character vi commands to edit R commands

As ``vi'' user I remarked a while ago, that - after calling ``R'' - three character commands like ``ctX'' will beep and do not work whereas two character commands like ``fX'' work as expected. Is there some help? Best regards - Wolfram __ R-help@r-proj

[R] {lattice/grid} "Error using packet 1" and traceback

On some errors during the plot of a lattice/grid graphics, there is written a message like "Error using packet 1: missing value where TRUE/FALSE needed" into the concering panel and the next panel is plotted. Which option I could use to stop the execution to have a look at the error by a traceback

[R] ignorable warnings of as.numeric: NAs introduced by coercion

Warnings are a good thing and can help to find errors in data. But with newer R versions I get more and more warnings which I would like to suppress in defined circumstances. In the manual of as.numeric() is noticed: as.numeric(c("-.1"," 2.7 ","B")) # (-0.1, 2.7, NA) + warning If I know