I have the values of a certain confusion matrix I want to analyze and determine the effect a cuttoff will have. Lets say I have these vectors:

```
v1 <- c(200, 25)
v2 <- c(10, 400)

```

these are the values of a confusion matrix (transposed, row 1 would be (10, 200), row 2 would be (400, 25). I want to know how a 50% cuttoff would affect the false negative.