Generate a set of random unique integers from an interval

Question

I am trying to build some machine learning models,

so i need a training data and a validation data

so suppose I have N number of examples, I want to select rando

Answer 1

from the raster package:

raster::sampleInt(242, 10, replace = FALSE)
##  95 230 148 183  38  98 137 110 188  39

This may fail if the limits are too large:

sample.int(1e+12, 10)