Replace values in grid data (3D) to NaN, like another (3D) have NaN
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el 6 de Ag. de 2020
Comentada: Walter Roberson
el 1 de Feb. de 2021
Hi to all
I have grid data VWind=300*16*21 and
SST=300*16*21 have NaN values
How i can to the replace NaN value at VWind data to the same location in SST data
Thanks in advance
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Respuesta aceptada
Sulaymon Eshkabilov
el 6 de Ag. de 2020
It can be done very easily with a logical indexing opt: e.g.:
Index = isnan(SST);
VWind(Index)=NaN;
Now you can compare and verify the elements of SST and VWind using sum() operator, for instance.
Good luck.
3 comentarios
James Karden
el 1 de Feb. de 2021
How could I get this to loop over each time step (let's say over 40 years) if I have a matrix of lat x lon x time?
Walter Roberson
el 1 de Feb. de 2021
If SST is 3D then you would not normally work by timestep: you would normally just do
VWind(isnan(SST)) = NaN;
If you need to work timestep by timestep for some reason, then see https://www.mathworks.com/matlabcentral/answers/731168-extract-specific-data-from-3d-matrix#answer_610468 for some ways in which you can extract information slice by slice.
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Sudheer Bhimireddy
el 6 de Ag. de 2020
I don't know if I understood your question properly, but here goes:
If you have NaN values in SST matrix and would like to replace VWind values to NaN wherever SST(i,j,k)=NaN:
VWind(isnan(SST)) = nan;
Similarly if VWind already has NaNs, to make corresponding indices of SST to NaN:
SST(isnan(VWind)) = nan;
If you run both these commands, then both your matrices will have same number of NaN values at same locations.
Hope this helps.
2 comentarios
James Karden
el 1 de Feb. de 2021
How could I get this to loop over each time step (let's say over 40 years) if I have a matrix of lat x lon x time?
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