<div dir="ltr">Hi Melissa,<div>I think all you need to do is to set trYMinF appropriately. I modified Pressure vs Time example #3 to replicate what you are doing:</div><div><a href="http://www.ncl.ucar.edu/Applications/height_time.shtml#ex3" target="_blank">http://www.ncl.ucar.edu/Applications/height_time.shtml#ex3</a><br></div><div><br></div><div>Setting trYMinF results in a warning but everything looks good. I've attached the modified script and the resulting plot.</div><div>Adam</div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Fri, Nov 1, 2019 at 10:21 AM MELISSA KAZEMI RAD via ncl-talk <<a href="mailto:ncl-talk@ucar.edu" target="_blank">ncl-talk@ucar.edu</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="ltr"><div class="gmail_default" style="font-family:georgia,serif">Hi,</div><div class="gmail_default" style="font-family:georgia,serif"><br></div><div class="gmail_default" style="font-family:georgia,serif">I have an urgent problem. I have two 2D datasets with dimensions height and time. However, they differ in their height dimension size; one has 26 vertical levels that ranges from 0 to 1500 m, the other 100 vertical levels that range from 0 to 3000 m. I'd like to overlay the second dataset (line contour) on the first one (filled contour), but I'm running into problems because the base plot has fewer vertical levels. I tried res@tfDoNDCOverlay = True but it's not working. </div><div class="gmail_default" style="font-family:georgia,serif"><br></div><div class="gmail_default" style="font-family:georgia,serif">I was wondering how I could achieve this overlay. what I'd like to be able to draw the base contour plot so that it takes the lower half of the plot, and then overlay the line contour plot, and then write the Y axis labels that range from 0 to 3000. </div><div class="gmail_default" style="font-family:georgia,serif"><br></div><div class="gmail_default" style="font-family:georgia,serif">I'd really appreciate any help.</div><div class="gmail_default" style="font-family:georgia,serif">Melissa</div><div><br></div>-- <br><div dir="ltr"><div dir="ltr"><font face="georgia, serif"><i>Melissa Kazemi Rad</i></font><div><font face="georgia, serif"><i>Atmospheric Sciences Department</i></font></div><div><font face="georgia, serif"><i>Rutgers University</i></font></div></div></div></div>
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