How replace NaN's in a 3d field with the nearest value in the same column?

7 次查看（过去 30 天）
Farshid Daryabor
Farshid Daryabor 2019-3-29
回答： Farshid Daryabor 2019-4-3
I have a 3d (z,x,y) matrix and trying to fill NaN's in the each grid point in xy directions with the nearest value correspond to the previous layer (level).
Any help and information will be helpful. Thank you
  2 个评论
Farshid Daryabor
Farshid Daryabor 2019-3-29
assume that have a 3d temperature matrix with 10 layers 'T(layer=10,x=30,y=50)', from the sea surface (layer = 1) to the seabed (layer=10) with NaN's values corresponding to the land. I am actually trying to replace the NaN's values at the seabed with the values of the previous layers.

请先登录，再进行评论。

请先登录，再回答此问题。

采纳的回答

Andrei Bobrov
Andrei Bobrov 2019-3-29
B = reshape(T,[],1);
lo = ~isnan(T);
ii = find(lo);
C = interp1(ii,B(lo),(1:numel(B))','previous');
T_out = reshape(C,size(T));

更多回答（3 个）

Farshid Daryabor
Farshid Daryabor 2019-3-29
assume that have a 3d temperature matrix with 10 layers 'T(layer=10,x=30,y=50)', from the sea surface (layer = 1) to the seabed (layer=10) with NaN's values corresponding to the land. I am actually trying to replace the NaN's values at the seabed with the values of the previous layers.
Guillaume
Guillaume 2019-3-29
fillmissing(your3darray, 'previous', 3) %fill nans with previous element along 3rd dimension
Possibly, with an optional 'EndValues', 'next' if you want to fill NaNs on the 1st layer with the next non-Nan value.
  3 个评论
显示 1更早的评论
Guillaume
Guillaume 2019-3-29
fillmissing requires R2016b or later. There is a field up there in the right corner of the page where you can enter which release you're actually using so we don't have to guess which functions may or may not be available to you.

请先登录，再进行评论。

Farshid Daryabor
Farshid Daryabor 2019-4-3
I'm trying to index a double 2d matrix 'A' with a complex 2d matrix 'B' and I encountering with the following error message, Any help and information will be helpful to fix it. Thank you,
>> C=A(B);
Subscript indices must either be real positive integers or logicals.
>> whos A
Name Size Bytes Class Attributes
A 215x395 679400 double
>> whos B
Name Size Bytes Class Attributes
B 215x395 1358800 double complex

类别

在 Help Center 和 File Exchange 中查找有关 Calculus 的更多信息

标签

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by