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subroutine noisegen(d4,nmax)
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real*4 d4(4,nmax)
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call init_random_seed() ! seed Fortran RANDOM_NUMBER generator
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call sgran() ! see C rand generator (used in gran)
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do i=1,nmax
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d4(1,i)=gran()
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d4(2,i)=gran()
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d4(3,i)=gran()
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d4(4,i)=gran()
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enddo
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return
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end subroutine noisegen
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