Gridded Interpolation in a certain volume and leave outside with NaN values

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Philippe Corner 2021-8-10

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/895372-gridded-interpolation-in-a-certain-volume-and-leave-outside-with-nan-values

评论： Philippe Corner 2021-8-10

采纳的回答： KSSV

var.mat.zip

在 MATLAB Online 中打开

the following scrpt creates this plot:

load('var.mat')
scatter3(xq(:),yq(:),zq(:),2,'k','filled'); hold on
scatter3(x,y,z,10,'r','filled')

From the data, you can see that xq,yq,zq and cq are a gridded data.

I want to use griddedInterpolant function to "fill" the cq(which contains NaN) values inside to x,y,z,c positions with an interpolation of c info. and remain all the points "outside" the red points as NaN.

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采纳的回答

KSSV 2021-8-10

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链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/895372-gridded-interpolation-in-a-certain-volume-and-leave-outside-with-nan-values#answer_764037

在 MATLAB Online 中打开

load('var.mat') ; 
scatter3(xq(:),yq(:),zq(:),2,'k','filled'); hold on
scatter3(x,y,z,10,'r','filled')
F = scatteredInterpolant(x,y,z,c,'nearest') ; 
cq0 = cq ; 
for i = 1:583
    i
    cq(:,:,i) = F(xq(:,:,i),yq(:,:,i),zq(:,:,i)) ;
end