MATLAB: Making a function to restructure matrix of coordinates

MATLABmatlab functionmatrixmatrix arraymatrix manipulation

I have a 36×3 matrix of data in a double, where the three columns represent x, y, and z coordinates. I'm trying to make two functions. The first will restructure the matrix so that it becomes a 6×6 data set, where the column and row numbers represent the x and y values and the cells represent the z values. The second reverses this, and converts the 6×6 back into the original 36×3. I've looked a bit into using the reshape function, but I dont know how to incorporate the values of the rows and columns. Any help is appreciated. Thanks.

Best Answer

Z=reshape(xyz(:,3),6,6); %6x6 format

and then to revert back,

[X,Y]=ndgrid(1:6);
xyz=[X(:),Y(:),Z(:)]; %36x3 format

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What do you mean "bad results"? Can you explain or show what you're doing?

Either way, I'm going to take a guess that the problem is related to the fact that you know the intensities are between 0 and 1, but imagesc always scales to the range of the data. But using image won't work either, because it uses actual values to index into the colormap. If that's the issue, then here are a couple of ways around it:

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"Since reshape dosent work"

reshape(matrix', 9, [])'

Best Answer

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