[ncl-talk] how to calculate the sum of one variable based on bins of another variable

[Xueyan Zhang]

Hello NCL,

I was trying to calculate the percentage contribution of each elevation
class (grouped in 100 m elevation bins) to precipitation over the whole
elevation bands. The precipitation and elevation have same latitudes and
longitudes, like precipitation(224,200) and elevation(224,200). Is there
any function in NCL to do this kind of calculation? The plot can be like
below: the solid blue line or the pink bars.

Thanks!

Xueyan

[image: D5137966-53FD-41AB-A371-47178A31FB5D.png]
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