Convert numeric vector to binary (0/1) based on limit

Question

I have a numeric vector: ``` p = c(0.69, 0.43, 0.72, 0.62, 0.29, 0.7) ``` I wish to compare the values to a limit, e.g. 0.5. If the values are equal or larger than the cut-off, the result should 1. Values less than 0.5 should become 0. I tried `ifelse`, but it errors: ``` newvector = rep(0, length(p)) newvector = ifelse(p >= 0.5, newvector = 1, newvector = 0) # Error in ifelse(p >= 0.5, newvector = 1, newvector = 0) : # unused arguments (newvector = 1, newvector = 0) ```

Accepted Answer

You don't need to make `newvector` beforehand and using it as an argument to `ifelse` is causing the error. Try this... ``` newvector <- ifelse( p>=0.5 , 1 , 0 ) ``` But even better just do it vectorised... ``` newvector <- as.integer( p >= 0.5 ) ```

Convert numeric vector to binary (0/1) based on limit

Solution

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