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    Hi Atul,<br>
    <br>
    your value range is wrong. You can use the printMinMax function to
    see the data range of the variables.<br>
    <br>
    <tt><font color="#3333ff">  printMinMax(tmean,0)<br>
          printMinMax(tmin,0)<br>
          printMinMax(tmax,0)</font></tt><tt><br>
    </tt><br>
    Returns<br>
    <br>
    <tt> : min=23.9729   max=25.8099</tt><tt><br>
    </tt><tt> : min=18.8202   max=20.6115</tt><tt><br>
    </tt><tt> : min=28.7211   max=31.7591</tt><br>
    <br>
    Add to the resources<br>
    <br>
    <font color="#3333ff"><tt>  res@trYMinF = 18.</tt><tt><br>
      </tt><tt>  res@trYMaxF = 32.</tt></font><br>
    <br>
    And you define plot2 with variable tmax instead of tmin.<br>
    <br>
    <font color="#3333ff"><tt> plot2 = gsn_csm_xy(wks,time,tmin,res)</tt></font><br>
    <br>
    -Karin<br>
    <br>
    <div class="moz-cite-prefix">Am 13.11.19 um 13:44 schrieb Atul Saini
      via ncl-talk:<br>
    </div>
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cite="mid:CACqmUao92WCyXB3FwZtKmgiTmGkMh+LOq5WHiNkGjQnM8LMxFw@mail.gmail.com">
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        <div>Hello All,</div>
        <div>              <b>Please have a look at the data and below
            given script, it is not resulting into overlay.</b></div>
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        </div>
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        begin<br>
          a=addfile("HP_Temp.nc","r")<br>
          tmean=a->tmean(:,0,0)<br>
          tmin=a->tmin(:,0,0)<br>
          tmax=a->tmax(:,0,0)          ; read in right variable (y2)<br>
          tmean_time=a->time(0:66)                ; this is our x<br>
         ;---Convert to fractional years for easier plotting.<br>
          time=cd_calendar(tmean_time,4)        ; scale for convenience<br>
        ;---Start the graphics<br>
         wks = gsn_open_wks("png","xy")              ; send graphics to
        PNG file<br>
        ;---Plotting options for time series plot<br>
          res             = True<br>
          res@gsnMaximize = True<br>
          res@gsnDraw     = False      ; Will draw later, after
        overlaying<br>
          res@gsnFrame    = False      ; all plots<br>
          res@vpWidthF    = 0.8        ; Make plots wider<br>
          res@vpHeightF   = 0.4<br>
        ;---Resources for legend<br>
          res@pmLegendDisplayMode    = "Always"              ; turn on
        legend<br>
          res@pmLegendWidthF         = 0.12                  ; Change
        width and<br>
          res@pmLegendHeightF        = 0.15                  ; height of
        legend.<br>
          res@pmLegendOrthogonalPosF = -0.08                 ; move up
        slightly <br>
          res@lgLabelFontHeightF     = .011                  ; change
        font height<br>
          res@lgPerimOn              = False                 ; no box
        around<br>
          res@lgItemOrder            = (/1,0/)               ; reverse
        legend<br>
        ;---Titles<br>
          res@tiMainString           = "Temperature"<br>
          res@tiYAxisString          = "Temp in Deg Celsius"<br>
        ;---Turn off some tickmarks<br>
          res@tmXTOn                 = False    ; bottom off<br>
          res@tmYROn                 = False    ; right off<br>
          res@xyLineThicknessF       = 2.0      ; default is 1<br>
          res@xyMonoDashPattern      = True     ; force all solid lines<br>
        ;--------------------------------------------------<br>
        ; The time_axis_label function adds additional<br>
        ; resources to "res" to produce nicely-formatted<br>
        ; time labels on X axis. This function only works<br>
        ; if you have a time "units" recognized by the<br>
        ; cd_calendar function.<br>
        ;---------------------------------------------------<br>
        ;---Set resources for colors and labels<br>
          colors1 = (/"blue","red"/)<br>
          colors2 = (/"darkgreen","darkorange"/)<br>
          colors3 = (/"brown","purple"/)<br>
          labels1 = "Tmean"<br>
          labels2 = "Tmax"<br>
          labels3 = "Tmin"<br>
        ;---Create the four XY plots<br>
          res@xyLineColors           = colors1<br>
          res@xyExplicitLegendLabels = labels1<br>
          res@pmLegendParallelPosF   = 0.15<br>
         plot1 = gsn_csm_xy(wks,time,tmean,res)<br>
          res@xyLineColors           = colors2<br>
          res@xyExplicitLegendLabels = labels2<br>
          res@pmLegendParallelPosF   = 0.37<br>
         plot2 = gsn_csm_xy(wks,time,tmax,res)<br>
          res@xyLineColors           = colors3<br>
          res@xyExplicitLegendLabels = labels3<br>
          res@pmLegendParallelPosF   = 0.59<br>
         plot3 = gsn_csm_xy(wks,time,tmax,res)<br>
        ;---Overlay one plot on the other, so they become one plot.<br>
          overlay(plot1,plot2)<br>
          overlay(plot1,plot3)<br>
          draw(plot1)            ; This will draw all four plots<br>
          frame(wks)<br>
        end
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                                                          <div><font
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