34 lines
549 B
Fortran
34 lines
549 B
Fortran
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!向量卷积(valid模式，去掉补零边缘)
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!要求m>=n
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!z的大小 = m-n+1
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SUBROUTINE conv_valid(m,x,n,y,z)
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implicit none
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integer :: m,n
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real*8 :: x(m),y(n),z(m-n+1)
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real*8 :: temp(m+n-1)
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integer :: i,j
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!z = 0
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!do i=1,m-n+1
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! do j=1,n
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! z(i) = z(i)+x(i+j-1)*y(j)
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! end do
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!end do
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z = 0
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temp = 0
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do i=1,m
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do j=1,n
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temp(i+j-1) = temp(i+j-1)+x(i)*y(j)
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end do
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end do
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z = temp(n:m)
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end subroutine
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