confusion matrix

General
1

Hello I'm getting this error while I'm triying to get the confusion matrix after a prediction.

mc = table(test$barbecue , pred0)
Error in table(test$barbecue, pred0) : 
  all arguments must have the same length

I've tried to fixe it via some solution available but it does not work.

2

Take a look at this:

table(sample(0:1, 9, replace = TRUE), sample(0:1, 10, replace = TRUE))
Error in table(sample(0:1, 9, replace = TRUE), sample(0:1, 10, replace = TRUE)) : 
  all arguments must have the same length

versus

table(sample(0:1, 10, replace = TRUE), sample(0:1, 10, replace = TRUE))
   
    0 1
  0 2 4
  1 3 1
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4

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