Programmer Guide/Command Reference/EVAL/shuffle: Difference between revisions
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;Result: The result has the same type and content as ''x'', but the order of the rows is changed (''shuffeld'') randomly. To shuffle the row indices, ''n'' times two randomly selected rows are exchanged. | ;Result: The result has the same type and content as ''x'', but the order of the rows is changed (''shuffeld'') randomly. To shuffle the row indices, ''n'' times two randomly selected rows are exchanged. | ||
;See also: [[Programmer_Guide/Command_Reference/EVAL/rand|rand]], [[Programmer_Guide/Command_Reference/EVAL/ | ;See also: [[Programmer_Guide/Command_Reference/EVAL/rand|rand]], [[Programmer_Guide/Command_Reference/EVAL/grand|grand]], [[Programmer_Guide/Command_Reference/EVAL/sample|sample]], [[Programmer_Guide/Command_Reference/EVAL/sort|sort]] | ||
[[Programmer_Guide/Command_Reference/EVAL#Functions|<function list>]] | [[Programmer_Guide/Command_Reference/EVAL#Functions|<function list>]] | ||
Revision as of 09:07, 11 April 2011
Create a shuffled version of a set.
- Usage
shuffle(x {, n {, once { seed}}})- x
- the set to be shuffled; must be a vector or matrix
- n
- the number of row exchanges applied top x;
0 < n(default=nrow(x)/2) - once
- change row position only once
- once==0: the number of exchanges of a row is not limited
- once!=0: the number of exchanges of a row is limited to 1
- seed
- if this value is not equal 0, it is used to initialize the random number generator used to select the rows to be exchanged
- Result
- The result has the same type and content as x, but the order of the rows is changed (shuffeld) randomly. To shuffle the row indices, n times two randomly selected rows are exchanged.
