[ncl-talk] stack area plot

[Sitan Heyl]

Hi, All
  I am plotting a figure, which include four stack area plots. I wonder why
NCL don't have stack plot function. if define a function to plot stack
area, it is convenient when we need plot multiple this kind of figures. So
I want to define stack_area function by myself, but it always met errors
when transfer parameters like this.

warning:TransformPostDraw: tfPolyDrawList element 0 is invalid

any one can help?
Best,
Yongli
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