How to do matrix regridding in matlab
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Hello, I am trying to use matlab to regrid a dataset. The original dataset is 128x193x12 (longitude x latitude x time) and I want to regrid it to a 180x193x12 matrix. I have the latitude of the original dataset as a 64x1 single (Dust_Data_lat), the longitude as a 128x1 single (Dust_Data_lon). For the 'final' grid (180x193x12), I have a latitude matrix 180x193 (constant columns, DUST_IN_lat) and a longitude matrix 180x193 (constant rows, DUST_IN_lon). I think the function griddata is best for this as the grid is irregular. If I try however, it complains about 'Z', which I don't know, see here for the first time dimension of the data:
a=Dust_LGM(:,:,1);
data_regridded = griddata(Dust_Data_lon,Dust_Data_lat,a,DUST_IN_lon,DUST_IN_lat);
The error I get is:
Error using griddata (line 109)
The lengths of X and Y must match the size of Z.
Would you know where the mistake is?
2 个评论
Matt J
2018-4-4
You should close your previous question by accept-clicking Jos' answer, since it appears you were happy with that answer. This will increase the likelihood of responses to future questions.
回答(1 个)
Matt J
2018-4-6
编辑:Matt J
2018-4-6
In griddata(x,y,z,xq,yq) the input arrays x,y,z must have the same number of elements. You have 128*193=24704 elements in a. You must therefore have 24704 corresponding elements in both Dust_Data_lon and Dust_Data_lat.
15 个评论
xinyu dong
2019-7-19
Hey Anne. I am struggling how to regrid with lon and lat right now. Do you have any recommandation? Thank you very much!
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