[gradsusr] Plot zonal mean along sin(latitude) instead of latitude

[Yuwei Liu]

Hi all,I'm plotting the zonal mean of a field, with x-axis as latitude and y-axis as the value.I want to scale the x-axis to represent the real area, so the distance of each latitude theta to 0 is sin(theta).Any idea?Thanks,Yuwei 		 	   		  
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