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rsuppress-warnings

R - suppressMessages / suppressWarnings not working

I have tried expressions with suppressMessages(expr), suppressWarnings(expr), but they keep outputting messages.

eg:

suppressWarnings(ksvm(y~., data=data, type='C-svc', cross=5, kernel=kernel))

keeps generating this message.

Setting default kernel parameters

How do I suppress messages from libraries? Is there a way to do this globally?

Have tried:

{r messages=FALSE, warnings=FALSE}
Solution

  • Here is the link to the line where the output is generated: https://github.com/cran/kernlab/blob/master/R/ksvm.R#L88

    Looking at that we see that the message is displayed with cat() not with message(). suppressMessages() does not suppress the cat output.

    There are multiple ways to get rid of the cat output. One is to capture the message and then hide it like so:

    invisible(capture.output(ksvm(...)))