First you must learn to be more specific in your description of what you want. 
That will allow others to understand what you actually want rather than 
guessing.

Perhaps try creating a small (3 var by 10 values) example, and describe the 
actual correlations you have created.

If your problem is that you don't know how to create what you want with any 
tool, then you should figure that out before posting here. 
stats.stackexchange.com might be helpful if that is the case.
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Sent from my phone. Please excuse my brevity.

Simon Givoli <givo...@gmail.com> wrote:

>Hi!
>
>I want to create a random matrix with 15 variables, each variable
>having
>1000 observations.
>Between each two variables, I want to define a specific (*not *random)
>correlations between them, but still saving the "randomness" of each
>variable (mean=zero, s.d=1).
>How can I do this in R?
>
>thanks,
>Simon
>
>       [[alternative HTML version deleted]]
>
>______________________________________________
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>PLEASE do read the posting guide
>http://www.R-project.org/posting-guide.html
>and provide commented, minimal, self-contained, reproducible code.

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