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Re: st: creating random groups of observations
From
Luca Campanelli <[email protected]>
To
"[email protected]" <[email protected]>
Subject
Re: st: creating random groups of observations
Date
Thu, 6 Dec 2012 01:28:47 +0000 (GMT)
thank you, John, for your answer.
I think that it would not work because I don't want each word to be in more than one group at the same time.
Luca
John Luke Gallup <[email protected]> wrote:
Luca,
You can generate a lot more than a 1000, and delete those that don't meet your criteria.
John
On Dec 5, 2012, at 5:00 PM, Luca Campanelli <[email protected]> wrote:
> I apologize for my previous email with no subject.
> 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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