NCL作图(XY图)学习课件

NCLGraphics1我是菜鸟2鱼与渔TypesofgraphicsyoucancreatewithNCLOver40plottingtemplatesXYContourVectorStreamlineOverlaysContoursovermaps,vectorsovercontours,etc.Primitivesmarkers,polylines,polygons,textSpecializedplotsbarcharts,skew-T,windroses,taylordiagramsThisiscalleda“panelplot”NCLcandowhateveryouwant！load"$NCARG_ROOT/lib/ncarg/nclscripts/csm/gsn_code.ncl"load"$NCARG_ROOT/lib/ncarg/nclscripts/csm/gsn_csm.ncl“beginf=addfile("$NCARG_ROOT/lib/ncarg/data/cdf/uv300.nc","r")u=f->UprintVarSummary(u)wks=gsn_open_wks("x11","xy")plot=gsn_csm_xy(wks,u&lat,u(0,:,{82}),False)endGettingStarted.hluresfile.hluresfile文件要位于主目录下。在.hluresfile文件里你可以设置你的显示属性：例如：前景色、背景色：*wkForegroundColor:(/0.,0.,0./)*wkBackgroundColor:(/1.,1.,1./)Colormap*wkColorMap:BlueWhiteOrangeRed字体：

●*Font:helvetica工作站(workstation)在画图之前必须要先创建一个工作站。图形命令将作用在工作站上。工作站需要赋予一个名字，这个名字将作为输出文件的文件名。你可以同时打开多个工作站。一个工作站只可以指定一个colormap。常用工作站：

1、x112、png

3、ps（eps）4、pdf例：wks=gsn_open_wks(“pdf”,”34_x_45”)wks_2=gsn_open_wks(“ps”,”myfile”)通过Resource画图通过Resources我们可以修改默认的NCL图形。每个resource属性的前两个小写字母代表了resource的类别，后面的单词首字母大写。Resource类别xy：xy图cn：等高线vc:向量gs：图像风格lb：labelbarlg：图例说明mp:地图pm:绘图管理ti:标题tm:刻度标记)tx:文本vp:显示窗口wks=gsn_open_wks("x11","xy")res=Trueres@vpHeightF=0.4res@vpWidthF=0.7res@vpXF=0.2res@vpYF=0.8plot=gsn_csm_xy(wks,u&lat,u(0,:,{82}),res)res@tiMainString=“BasicXYplot”res@tiXAxisString=“Lat”res@tiYAxisString=“U”res@tiMainFont=25res@tiMainFontHeightF=0.02;(Default:0.025)res@tiXAxisFontHeightF=0.02;(Default:0.025)res@tiYAxisFontHeightF=0.020res@gsnLeftString=“a”res@gsnRightString=“w/s”res@gsnStringFontHeightF=0.015;(Default:dynamic)res@tiYAxisAngleF=0.res@xyLineColor="red“;(/1,0,0/)res@xyLineThicknessF=2.0res@trYMinF=-20res@trYMaxF=80res@trXMinF=0res@trXMaxF=90res@tmXBMode="Explicit"res@tmXBValues=ispan(0,90,10)res@tmXBLabels=res@tmXBValues+"~S~o~N~N"res@tmXBLabels(0)="EQ"res@tmXBLabelFontHeightF=0.015res@tmXBMinorValues=ispan(0,90,2)res@xyMarkLineMode="Markers"res@xyMarker=2res@xyMarkerColor="blue"res@xyMarkerSizeF=0.015;Default:.01res@tmXMajorGrid=Trueres@tmYMajorGrid=Trueres@tmXMajorGridLineDashPattern=1res@tmYMajorGridLineDashPattern=1;res@xyMarkLineMode="Markers";res@xyMarker=2;res@xyMarkerColor="blue";res@xyMarkerSizeF=0.015;Default:.01;res@xyLineColor="red";res@tmXMajorGrid=True;res@tmYMajorGrid=True;res@tmXMajorGridLineDashPattern=1;res@tmYMajorGridLineDashPattern=1plot=gsn_csm_xy(wks,u&lat,u(:,:,{82}),res)res@pmLegendDisplayMode="Always"res@pmLegendHeightF=0.1res@pmLegendWidthF=0.15res@pmLegendSide="Top"res@pmLegendOrthogonalPosF=-0.5res@pmLegendParallelPosF=0.88res@lgLabelFontHeightF=0.012;Default:0.02res@lgPerimOn=Falseres@xyExplicitLegendLabels=(/"t0","t1"/)res@lgItemOrder=(/1,0/)res@xyMonoDashPattern=Trueres@xyLineColors=(/"red","blue"/)res@gsnYRefLine=0.res@gsnYRefLineDashPattern=1res@gsnDraw=Falseres@gsnFrame=Falseplot=gsn_csm_xy(wks,u&lat,u(:,:,{82}),res)u0_max=max(u(0,:,{82}))ilat=ind(u(0,:,{82}).eq.u0_max)x0_max=u&lat(ilat)xx=(/0,x0_max,x0_max/)yy=(/u0_max,u0_