R, Shiny, custom error messages

Question

When there is an error in R, there is usually a red error message shown in the dashboard.

Is there a way to define custom error messages and trigger errors in the server code?

Answer 1

R CMD BATCH "yourRcode.R" >> logfile.log

这样，您就可以从进程中获取一个名为“ logfile.log”的日志文件。