Hi Shuhua,
Try setting the resource vpHeightF, which should set each plot to the same 
height. 
See http://ngwww.ucar.edu/ngdoc/ng/ref/hlu/obj/View.res.html
Adam
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>From: "S. Yi" <yis2@univmail.cis.mcmaster.ca>
>To: ncl-talk@ucar.edu
>Date: Thu, 13 Jan 2005 12:19:22 -0500
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>Subject: Problem of Y-axis of contour plots
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>Hello,
>
> I ploted three plots in one panel.
>
> First one is contour of measured soil temperature
>  Depths of measurement are 2, 5, 10 , 50, 100 cm
>
> Second is contour of modelled soil temperature
>  Depths of model nodes are 0.7, 2.8, 6.2, 11.9, 21, 37, 62, 103 cm
>
> Third is X-Y plot for predicted front depth.
> 
> 
> Contour plots use Log axis for Y-axis automatically, although I use
>  resourse@trYLog = False
>  
>  Since I cannot plot all three figures using linear Y axis, I try to
>plot all  three using log axis, and use following resources
>   resourse@tmYLValues=(/0,20, 40, 60, 80/)
>   resourse@tmYLLabels=(/0,20, 40, 60, 80/)
>   
>  However, the distances in the Y-axis between 0 and 20 for three
>figures are all different from   each other. 
>It is hard to compare them.
>  
>  My questions are:
>  
>  First, how to force the contour figure to use linear axis.
>  
>  Second, how to make all three y-axis have the same scale.
>  
>  Thanks a lot
>  
>Yi, Shuhua
>School of Geography and Geology
>McMaster University
>Hamilton, ON, CA L8S 4K1
>--------------------------------
>Office: GSB-221
>Phone: 905-525-9140 Ext. 24776
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-------------------------------------------------------------
Adam Phillips			     email: asphilli@ucar.edu
Climate and Global Dynamics Division      tel: (303) 497-1726
National Center for Atmospheric Research  fax: (303) 497-1333
P.O. Box 3000				  
Boulder, CO 80307-3000	    http://www.cgd.ucar.edu/~asphilli
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