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John Luke Gallup <email@example.com>
Wed, 5 Dec 2012 17:06:25 -0800
You can generate a lot more than a 1000, and delete those that don't meet your criteria.
On Dec 5, 2012, at 5:00 PM, Luca Campanelli <firstname.lastname@example.org> wrote:
> Dear Stata users,
> I have a string variable "word" with 4000 words, and I'd like to create 1000 groups of 4 randomly selected words (the group of words will be trials in an experimental task). I also have info about the number of characters of each word.
> The dataset:
> ID WORD CHR
> 1 acorn 5
> 2 address 7
> 3 adult 5
> One way to do it could be:
> generate rdm = runiform()
> sort rdm
> egen group = seq(), from(1) to(1000) block(1)
> My question is if I can constrain the groups to meet a certain criterion: I'd like that each group of words has a total number of characters between given limits, for example between 18 and 28 total number of characters. I mean that I don't want groups with 4 short words or groups with 4 long words.
> Do you know if there is any way to do it?
> Thank you for any help anybody can provide.
> Luca Campanelli
> PS I have Stata IC 12.1 on Windows 7.
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