matlab function randperm () usage

Original link: https://blog.csdn.net/u013476464/article/details/25198071

randperm () function uses
a random function
syntax:

p = randperm (a)
p = randperm (n, k)

Syntax description:

p = randperm (n) Returns the row contains an integer from 1 to n.

>> randperm(6)
 
ans =
 
     2     5     6     4     1     3
 
>> 

p = randperm (n, k) returns a row from 1 to n, k is an integer, and the number k which is not the same.

randperm complete rearrangement is not repeated sampling (k-permutations), if the number of results in the need to repeat the case of multiple occurrences, you can use:

randi (n, 1, k) .
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Original link: https: //blog.csdn.net/u013476464/article/details/25198071