







I am try to plot a data frame, and encounter some difficulties. 
 
my x axis range is from -60 to 80 and unit length is 10 
so x axis looks like
 
-60, -40, -20, ......, 40,60,80
 
But I want chang unit length from 10 to 5
 
-60, -50, -40, ......, 60,70,80
 
Does anyone know how to do it?
 
Thanks



      
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