[[random()]]
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en:create:functions:random [10.04.2016 10:17] – [random()] adminen:create:functions:random [10.04.2016 10:20] – [Drawing with Replacement] admin
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 **Note:** If a random draw without replacement is used in an experiment, then different sizes of experimental groups are inevitable. SoSci Survey offers [[:en:create:random_urns|urns]] for random draws with replacement. **Note:** If a random draw without replacement is used in an experiment, then different sizes of experimental groups are inevitable. SoSci Survey offers [[:en:create:random_urns|urns]] for random draws with replacement.
  
-**Note:​** See [[:​en:​create:​randomization]] for the application of random draws.+**Note:​** See [[:en:create:randomization]] for the application of random draws.
  
  
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 The PHP functions ''[[:en:create:functions:random|random()]]'' and ''[[:en:create:functions:random_p|random_p()]]'' (for weighted random draws) randomly draw with replacement. An unrestricted random draw "with replacement" is comparable to throwing a die. As a rule, group sizes vary greatly here and this can be problematic for the analysis. The PHP functions ''[[:en:create:functions:random|random()]]'' and ''[[:en:create:functions:random_p|random_p()]]'' (for weighted random draws) randomly draw with replacement. An unrestricted random draw "with replacement" is comparable to throwing a die. As a rule, group sizes vary greatly here and this can be problematic for the analysis.
  
-**Note:** When drawing with replacement, it is crucial to ensure that the random number is saved in the data record. To do this, use an [[:​en:​create:​questions:​internal|internal variable]] and the function ''[[:de:create:functions:put|put()]]''.+**Note:** When drawing with replacement, it is crucial to ensure that the random number is saved in the data record. To do this, use an [[:​en:​create:​questions:​internal|internal variable]] and the function ''[[:en:create:functions:put|put()]]''.
  
   - Add a new question in the **List of Questions** using the type "Internal Variables" (e.g. with ID ''IV01'')   - Add a new question in the **List of Questions** using the type "Internal Variables" (e.g. with ID ''IV01'')
   - Add a variable (item) in this question with the description, as an example, "random number". According to the **Variables List**, this variable's ID is ''IV01_01''.   - Add a variable (item) in this question with the description, as an example, "random number". According to the **Variables List**, this variable's ID is ''IV01_01''.
-  - [[php|PHP code]] is used to carry out the actual random draw.+  - [[:en:create:php|PHP code]] is used to carry out the actual random draw.
  
 <code php> <code php>
en/create/functions/random.txt · Last modified: 14.03.2022 12:31 by walliser
 
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