横轴和纵轴如何只显示给定的区间范围？

NWP

大家好，请教一个问题，我想让横轴和纵轴只显示给定的区间范围，即横轴为3到8，纵轴也为3到8，程序和图如下，请问大家哪里出了问题？谢谢。

                               
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NWP

begin

nt=101
nlev=81
nlat=161
nlon=161


q=new((/nt,nlev,nlat,nlon/),"float")
u=q
v=q
w=q
th=q
p=q

th2D=new((/nlon,nlat/),"float")
x=new(nlon,"float")
y=new(nlat,"float")

do gg=0,nt-1
  q(gg,:,:,:)=fbinrecread("./123.dat",0+6*gg,(/nlev,nlat,nlon/),"float")
  u(gg,:,:,:)=fbinrecread("./123.dat",1+6*gg,(/nlev,nlat,nlon/),"float")
  v(gg,:,:,:)=fbinrecread("./123.dat",2+6*gg,(/nlev,nlat,nlon/),"float")
  w(gg,:,:,:)=fbinrecread("./123.dat",3+6*gg,(/nlev,nlat,nlon/),"float")
th(gg,:,:,:)=fbinrecread("./123.dat",4+6*gg,(/nlev,nlat,nlon/),"float")
  p(gg,:,:,:)=fbinrecread("./123.dat",5+6*gg,(/nlev,nlat,nlon/),"float")
end do


do j=0,nlat-1
  do i=0,nlon-1
      th2D(i,j)=th(nt-1,11,j,i)
      x(i)=0.0625*i
      y(j)=0.0625*j
   end do
end do

;th2D=th2D(:,:)
;th2D@lon2d=x(:,:)
;th2D@lat2d=y(:,:)

th2D!0="lon"
th2D!1="lat"
th2D&lon=x
th2D&lat=y
printVarSummary(th2D)

wks=gsn_open_wks("x11","plot")
res=True

res@tmXBMode="Explicit"
res@tmXBValues=ispan(3,8,1)
res@tmXBLabels=(/3,4,5,6,7,8/)
res@tmLabelAutoStride=True


res@tmYLMode="Explicit"
res@tmYLValues=ispan(3,8,1)
res@tmYLLabels=(/3,4,5,6,7,8/)
res@tmLabelAutoStride=True

plot=gsn_csm_contour(wks,th2D,res)


end

NWP

C:\Users\qxt\Desktop\123.jpg