Keep getting NAs in the knitted document even though everything is fine in RStudio

[Alina Oshina]

Hi everyone,

I am really confused with this problem... When the code is evaluated within RStudio, everything works fine:

But, when I press the knit button and the document opens, I get a table with NAs:

What can possibly be the problem?

Thanks

[Christopher Bratt]

Have you restarted R before trying the code interactively?
If you restart R and then get the same NA result in interactive work, it should be easy to spot the error in your code.