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请问风速矢量图矢量没合成是什么原因
风速矢量resv设置如下
resv = True
resv@vcRefAnnoArrowUseVecColor = False
resv@vcRefAnnoOn = False
;resv@stMinArrowSpacingF = 0.008 ; arrow spacing.
;resv@stArrowLengthF = 0.008 ; arrow length
;wAve = avg(wta(i,:,:20)) ; used for scaling
;vAve = avg(uta(i,:,:20))
;scale = fabs(vAve/wAve)
;wscale = wta*scale
resv@vcGlyphStyle = "LineArrow"
resv@vcRefAnnoOn = True
resv@vcRefAnnoOrthogonalPosF = -0.25 ; move reference vec up
resv@pmLabelBarOrthogonalPosF = -0.05 ; move color label bar up
resv@vcRefMagnitudeF = 5 ; define vector ref mag矢量图参考矢量
resv@vcRefLengthF = 0.01 ; define length of vec ref
;res@vcMapDirection = False
;res@vcMinAnnoOn = False
resv@vcMinDistanceF = 0.05 ;疏密
resv@vcMinFracLengthF = 0.1
resv@tmXBOn = False
resv@tmYLOn = False
resv@vcMapDirection = False
;resv@vcPositionMode = "ArrowTail"
;uta = 0
;plot = gsn_csm_contour(wks,wta(i,:,:200),res)
vector = gsn_csm_vector(wks, uta(i,:,:200),wta(i,:,:200)*35, resv)
plot = gsn_csm_contour(wks,wta(i,:,:200),res)
overlay(plot, vector)
draw(plot)
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