Qbik - 9 months ago 46

R Question

How to convert an integer number into binary vector using R?

For example :

`number <- 11`

[1] 1 0 1 1

what is the fastest possible method of conversion (using R code or some existing functions from packages) if I need to convert whole vector of numbers (minimum value = 0, maximum =300) into binary matrix ?

Answer Source

There's the `intToBits`

function that converts any integer to a vector of 32 raws, so you can do this:

```
decimals <- c(3,5,11,4)
m <- sapply(decimals,function(x){ as.integer(intToBits(x))})
m
> m
[,1] [,2] [,3] [,4]
[1,] 1 1 1 0
[2,] 1 0 1 0
[3,] 0 1 0 1
[4,] 0 0 1 0
[5,] 0 0 0 0
[6,] 0 0 0 0
[7,] 0 0 0 0
[8,] 0 0 0 0
[9,] 0 0 0 0
[10,] 0 0 0 0
[11,] 0 0 0 0
[12,] 0 0 0 0
[13,] 0 0 0 0
[14,] 0 0 0 0
[15,] 0 0 0 0
[16,] 0 0 0 0
[17,] 0 0 0 0
[18,] 0 0 0 0
[19,] 0 0 0 0
[20,] 0 0 0 0
[21,] 0 0 0 0
[22,] 0 0 0 0
[23,] 0 0 0 0
[24,] 0 0 0 0
[25,] 0 0 0 0
[26,] 0 0 0 0
[27,] 0 0 0 0
[28,] 0 0 0 0
[29,] 0 0 0 0
[30,] 0 0 0 0
[31,] 0 0 0 0
[32,] 0 0 0 0
```