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create a new 4D Array from 2 others

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Pepe Grillo
Pepe Grillo 2021 年 2 月 24 日
コメント済み: Pepe Grillo 2021 年 2 月 25 日
Hi!
i want to build a new 4d array from 2 others and one array is telling me the position of the values that i want,
any idea?
Thanks!
  7 件のコメント
Pepe Grillo
Pepe Grillo 2021 年 2 月 25 日
last value from u1 means that not allways the last value is the at the level 7 because the bathymetrie is changing and could be at 5 or 3 or 1
something like that
let me know
thanks!

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Rik
Rik 2021 年 2 月 25 日
I think I understand what you mean. The code below will overwrite all values that are not NaN for a given depth, which is equivalent to setting it to the last non-NaN (except if the first value is NaN).
%generate some fake data
%cumsum will ensure all values after the first NaN are NaN as well
u1=rand(241,97,7,1637);u1(u1<0.1)=NaN;u1=cumsum(u1,3);
u2=u1(:,:,1,:);
for depth=1:size(u1,3)
layer=u1(:,:,depth,:);
L=~isnan(layer);
u2(L)=layer(L);
end
  3 件のコメント
Pepe Grillo
Pepe Grillo 2021 年 2 月 25 日
yes sure, just the second part works perfect
thk!

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