2.2.19. permuteData

---

Purpose

Permute all values in given column(s).

Usage

> permuteData options ASCII table(s) 

Options

-l / --label

column(s) to permute

-u / --unique

shuffle unique values as group

-r / --rnd [ none ]

seed of random number generator

---

Example

Suppose we have an ASCIItable

1 head
x type
1 1
2 1
3 1
4 2
5 3
6 2

Independent shuffling

With

> permuteData --label type 

we may get

1 head
x type
1 3
2 2
3 1
4 1
5 2
6 1

or any other possible permutation of 1,2, and 3. However, there will always be three times 1, two times 2, and a single 3 entry.

Group shuffling

With

> permuteData --unique --label type 

we may get

1 head
x type
1 2
2 2
3 2
4 3
5 1
6 3

or any other possible permutation of 1,2, and 3. This time, the grouping is maintained, i.e. the first three remain identical and the values at x=4 and x=6 are the same, but the actual values are shuffled.