How to create a joint frequency table?


I have to create a joint frequency table with this information:

And I tried to use the command x=c(rep(x,ni)...) as I use to do with the normal frequency tables But this is different and i have no clue how to do it.

Knows someone how to do it?

Thank you.

Welcome. Here is an example with the penguins dataset from the palmerpenguins package.

table(penguins[, c("species", "island")])

species     Biscoe Dream Torgersen
  Adelie        44    56        52
  Chinstrap      0    68         0
  Gentoo       124     0         0

The point is that I only have that table. I mean, I can’t open it from a library

Can you provide a reproducible example?

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