How to use "nan"

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gyeonggeun kim
gyeonggeun kim 2021-3-26
评论： gyeonggeun kim 2021-3-26
I want to get rid of the color by using "nan" ,marked on the map.
The code is as follows.
  2 个评论
John D'Errico
John D'Errico 2021-3-26
What does getting rid of a color mean here? Are you asking to replace those pixels with new ones that are blue, and look smoothly like the rest of the turbulent region in that area? Or do you just want to have a white area in that region, so essentially nothing plotted?
gyeonggeun kim
gyeonggeun kim 2021-3-26
I want to change the pixels to blue and make them look as smooth as any other turbulent region in the area.

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回答（2 个）

Veronica Taurino
Veronica Taurino 2021-3-26
KSSV
KSSV 2021-3-26
编辑：KSSV 2021-3-26
LEt's say you want to change the values beyond a given value val (a number) into NaN. Use:
u(u>val) = NaN ;
isnan is afunction used to check whether a value is nan or not. You can check after replacing values with NaN using:
u(isnan(u))
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KSSV
KSSV 2021-3-26
u(u>val) = 0 ; % any number else from 0 also can be taken
gyeonggeun kim
gyeonggeun kim 2021-3-26
I will try it!! thank you

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