[ncl-talk] X-axis extent problem

[Kiswendsida Hyacinthe GUIGMA]

Thanks a lot dear Mary. 
I was using res at trXMinF and res at trXMaxF but with arbitrary values as in your first suggestion. But after set these parameters using the actual min and max of my data as in your second suggestion it worked perfectly. 
Thank you for your help!
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GUIGMA 

    On Wednesday, 20 December 2017, 14:09, Mary Haley <haley at ucar.edu> wrote:
 

 Without being able see your data or your script, we can't be sure of what the problem is.
When NCL creates the plot's axes, it tries to use "nice" values for the X and Y axes minimum and maximum values. This means that you might get some extra space on one or both axes if the actual range of the data is not "nice" numbers. 
For example, if your X axis goes from 1.1 to 9.5, then NCL may choose 1 for the minimum X value and 10 for the maximum X value.  The data will be plotted correctly, regardless.
If you need to set the limits of your X axis, then use the trXMinF and trXMaxF resources:
  res at trXMinF = 1.1  res at trXMaxF = 9.5
Or, use the data itself to determine the min and max:
  res at trXMinF = min(x)  res at trXMaxF = max(x)
Where "x" is the first array being passed to gsn_csm_xy.
In your case, there's something strange going on with the X axis because there appears to be far too much white space on the X axis. I don't know what the cause of this is, but you need to look at your X array using printVarSummary and printMinMax to see what the range of this array is.
Since you have time values on the X axis, uou might want to check out the user contributed function "time_axis_labels". This procedure gives you nice labels on a time axis.  For some examples, see:

http://www.ncl.ucar.edu/Applications/time_labels.shtml

The first example on this page sets trXMinF and trXMaxF.
--Mary



On Tue, Dec 19, 2017 at 9:21 AM, Kiswendsida Hyacinthe GUIGMA via ncl-talk <ncl-talk at ucar.edu> wrote:

Dear NCL users,I am doing a simple xy-plot but I don't get nice pictures. Actually the problem is that my plot doesn't take all the extent of the axis. It leaves some space at the right and the left corners. Please have a look at the attached png file to understand more. I have tried to solve this problem using many resources but without success. 
Thank you in advance for your help!

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GUIGMA
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