How to use "nan"

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gyeonggeun kim
gyeonggeun kim on 26 Mar 2021
Commented: gyeonggeun kim on 26 Mar 2021
I want to get rid of the color by using "nan" ,marked on the map.
The code is as follows.
  2 Comments
John D'Errico
John D'Errico on 26 Mar 2021
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 on 26 Mar 2021
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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Answers (2)

Veronica Taurino
Veronica Taurino on 26 Mar 2021

KSSV
KSSV on 26 Mar 2021
Edited: KSSV on 26 Mar 2021
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))
  11 Comments
KSSV
KSSV on 26 Mar 2021
u(u>val) = 0 ; % any number else from 0 also can be taken
gyeonggeun kim
gyeonggeun kim on 26 Mar 2021
I will try it!! thank you

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