I have an array of measurements, that I've been doing linear
regression model and AI models on. Because there are many errors and
the values are "ill-formed" I would like to copy the array, but
replace each value with the PERCENTILE of that value, in the original
mesments$V1: 9, 77, -1
would become: mesmentsCopy$V1: 50, 100, 0
The actual array has many more rows and columns, of course.