<div dir="ltr"><div><div>Hello ncl-users,<br><br></div>I am trying to plot a pressure vs latitude plot where the pressure goes 1000 hPa to 0.01 hPa. But if I try to plot anything above 1 hPa I am getting a set of following errors. <br><br>warning:_NhlCreateSplineCoordApprox: Attempt to create spline approximation for Y axis failed: consider adjusting trYTensionF value<br>warning:IrTransInitialize: error creating spline approximation for trYCoordPoints; defaulting to linear<br>warning:LlSetValues: invalid range for Y Axis log mode; setting trYLog off<br><br></div>Here is the resource part of my plot: <br><br>;************************************************************************<br>; Resources for the plot<br>;***********************************************************************<br><br>  res                              = True      <br>  <br>  res@gsnDraw                      = False<br>  res@gsnFrame                     = False<br>  res@gsnMaximize                  = False<br>  res@gsnSpreadColors              = True <br>  res@gsnSpreadColors              = True                ; use full colormap<br><br>  res@cnFillOn                     = True               <br>  res@cnLinesOn                    = False           <br>  res@cnLevelSelectionMode         = &quot;ManualLevels&quot;<br>  res@cnMinLevelValF               = 180<br>  res@cnMaxLevelValF               = 300<br>  res@cnLevelSpacingF              = 2<br>  res@cnInfoLabelOn                = False                     ; turn off cn info label<br>  res@cnLineLabelsOn               = False<br>  res@cnLineLabelFontHeightF       = 0.015<br><br>  res@tmLabelAutoStride            = True<br>  res@tmXTOn                       = False<br>  res@tmYROn                       = True<br>  res@tmXBLabelFontHeightF         = 0.030 <br>  res@tmYLLabelFontHeightF         = 0.030<br><br>  res@trYTensionF                  = 0.5 <br>  res@trYLog                       = True<br><br>  res@lbOrientation                = &quot;horizontal&quot;  ;vertical label bar<br>  res@lbLabelBarOn                 = False<br>  res@lbLabelAutoStride            = True<br><br><div><div><br clear="all"><div><div>I guess it is due to the irregular pressure axis but is there any way to solve it and make a plot properly? Thank you for any suggestions. <br><br></div><div>Thanks,<br></div><div>Soumik<br></div><div>-- <br><div class="gmail_signature" data-smartmail="gmail_signature"><div dir="ltr"><div><div>-- </div><div>&quot;Learn from yesterday, live for today, hope for tomorrow. The important thing is not to stop questioning.&quot; - Albert Einstein</div><div><br></div><div>**************************************************************************************************</div><div>Dr. Soumik Basu</div><div>Post Doctoral Fellow, International Arctic Research Center, UAF, Fairbanks, AK, USA</div><div>Nanjing University of Information Science and Technology, Nanjing, China</div><div>PhD in Atmospheric Sciences</div><div>M.Sc. in Atmospheric Sciences</div><div>Email: <a href="mailto:suvro05@gmail.com" target="_blank">suvro05@gmail.com</a></div><div>website: <a href="http://soumikbasu.weebly.com/" target="_blank">http://soumikbasu.weebly.com/</a></div><div><br></div><div>***************************************************************************************************</div></div></div></div>
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