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subroutine zplot(amp,nz,jj,ave,rms)
real amp(nz)
character*1 line(100),mark(0:6)
data mark/' ',' ','.','-','+','X','$'/
sum=0.
smax=0.
do i=1,nz
sum=sum+amp(i)
if(amp(i).gt.smax) then
smax=amp(i)
ipk=i
endif
enddo
ave=(sum-smax)/(nz-1)
sq=0.
do i=1,nz
if(i.ne.ipk) sq=sq+(amp(i)-ave)**2
enddo
rms=sqrt(sq/(nz-2))
do i=1,nz
n=(amp(i)-ave)/rms
! n=(amp(i)-ave)/0.33
if(n.lt.0) n=0
if(n.gt.6) n=6
line(i)=mark(n)
enddo
write(89,1010) jj,0.01*ave,0.01*rms,(line(i),i=1,nz)
1010 format(i3,2f6.1,1x,100a1)
return
end subroutine zplot
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