<div dir="ltr"><div class="gmail_default" style="font-size:small">Hi Michael,</div><div class="gmail_default" style="font-size:small"><br></div><div class="gmail_default" style="font-size:small">Part of the problem is that you've set the minimum of your X axis (the longitude axis to 0):</div>
<div class="gmail_default" style="font-size:small"><br></div><div class="gmail_default" style="font-size:small"><span style="color:rgb(255,0,0);font-family:Tahoma;font-size:13px;background-color:rgb(255,255,153)">res@trXMinF = 0 ; set minimum X-axis value</span><br style="color:rgb(255,0,0);font-family:Tahoma;font-size:13px;background-color:rgb(255,255,153)">
<span style="color:rgb(255,0,0);font-family:Tahoma;font-size:13px;background-color:rgb(255,255,153)">res@trXMaxF = 30 ; set maximum X-axis value </span><br></div><div class="gmail_default" style="font-size:small">
<br></div><div class="gmail_default" style="font-size:small">This is causing your longitudes to only go from 0 to 30, and hence you are not going to see any labels or tickmarks at negative longitude values.</div><div class="gmail_default" style="font-size:small">
<br></div><div class="gmail_default" style="font-size:small">I suggest not setting the tr*M**F resources at all, unless you need to zoom in on the plot for some reason.</div><div class="gmail_default" style="font-size:small">
<br></div><div class="gmail_default" style="font-size:small">Also, if you are indeed plotting lat/lon data, you should be calling "gsn_csm_contour_map" and not "gsn_csm_contour". The former will put draw contours over a map, whereas the latter only draws a contour plot. For examples of using gsn_csm_contour_map, see:</div>
<div class="gmail_default" style="font-size:small"><br></div><div class="gmail_default" style><a href="http://www.ncl.ucar.edu/Applications/cylineq.shtml">http://www.ncl.ucar.edu/Applications/cylineq.shtml</a><br></div><div class="gmail_default" style>
<br></div><div class="gmail_default" style>Note that some of these examples are using "gsn_csm_contour_map_ce", which is the same thing. gsn_csm_contour_map will draw a cylindrical equidistant map plot by default, unless you change the map projection.</div>
<div class="gmail_default" style="font-size:small"><br></div><div class="gmail_default" style="font-size:small">--Mary</div><div class="gmail_default" style="font-size:small"><br></div></div><div class="gmail_extra"><br><br>
<div class="gmail_quote">On Sat, Jul 26, 2014 at 7:44 AM, Hemming, Michael <span dir="ltr"><<a href="mailto:michael.hemming@mpimet.mpg.de" target="_blank">michael.hemming@mpimet.mpg.de</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div>
<div style="direction:ltr;font-family:Tahoma;color:#000000;font-size:10pt">Hey everyone,<br>
<br>
I am having trouble understanding how to alter tickmarks on a contour plot. I want to change my index numbers on the x and y axis to lat and lon values. I have been trying to use the example given here:
<a href="http://www.ncl.ucar.edu/Applications/Scripts/tm_2.ncl" target="_blank">http://www.ncl.ucar.edu/Applications/Scripts/tm_2.ncl</a>
<br>
<br>
Here is my code ( I have only tried altering the second plot out of the 2 e.g. for plot1(1)..):<br>
<br>
;----------MPIOM vs. ICON comparison plots<br>
<br>
<br>
<span style="background-color:rgb(255,255,153)"><br>
<font color="FF0000">wks = gsn_open_wks("x11","MPIOM_vs_ICON_panelplot_surface")<br>
gsn_define_colormap(wks,"gui_default") <br>
<br>
<br>
plot1 = new(2,graphic) <br>
<br>
res@gsnDraw = False ; don't draw<br>
res@gsnFrame = False ; don't advance frame<br>
resP = True<br>
res@tiYAxisString = "Latitude"<br>
res@tiXAxisString = "Longitude"<br>
resP@txString = "Surface T averaged for years 01-99"<br>
res@lbOrientation = "vertical" ; vertical label bar<br>
<br>
res@trXMinF = 0 ; set minimum X-axis value<br>
res@trXMaxF = 40 ; set maximum X-axis value <br>
res@trYMinF = 0 ; set minimum Y-axis value<br>
res@trYMaxF = 120 ; set maximum Y-axis value<br>
res@tiMainString = "MPIOM exp 12"<br>
<br>
<br>
plot1(0) = gsn_csm_contour(wks,Tavg(1,:,:),res)<br>
<br>
<br>
res@trXMinF = 0 ; set minimum X-axis value<br>
res@trXMaxF = 30 ; set maximum X-axis value <br>
res@trYMinF = 0 ; set minimum Y-axis value<br>
res@trYMaxF = 80 ; set maximum Y-axis value<br>
res@tiMainString = "ICON NOSH.UPW"<br>
<br>
res@tmXBMode = "Explicit" <br>
res@tmXBValues = (/-44.5,-27.5,-5.5,14.5,34.5/)<br>
res@tmXBLabels = "" + res@tmXBValues <br>
res@tmXBMinorValues = ispan(0,30,1)<br>
<br>
<br>
<br>
<br>
plot1(1) = gsn_csm_contour(wks,potTavg(1,:,:),res)<br>
<br>
<br>
gsn_panel(wks,plot1,(/1,2/),resP) </font></span><br>
<br>
<br>
<span style="background-color:rgb(255,255,255)"><font color="000000">I want l<font color="000000">ongitude from -44.5
<font color="000000">E</font> to 34.5 <font color="000000">W, once I know how to do it for longitude, I can then apply the code to the lat.<br>
<br>
<font color="000000">thanks<font color="000000"><font color="000000"> in advance!</font><span class="HOEnZb"><font color="#888888"><br>
<br>
<font color="000000">Micha<font color="000000">el</font></font><br>
</font></span></font></font></font></font></font></span></div>
</div>
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<br></blockquote></div><br></div>