How to convert 2D array to a comma separated list of array

regions = regionprops(label, image(:,:,1), 'Centroid');

regions(:).Centroid gives me a comma-separated-lists of vectors. How can I convert a 2D array into a comma-separated-list-of-vectors ? Below example I want to concatenate mean rgb data into region(:).MeanIntensity

r_data  = regionprops(label, image(:,:,1), 'PixelValues', 'MeanIntensity');
g_data  = regionprops(label, image(:,:,2), 'PixelValues', 'MeanIntensity');
b_data  = regionprops(label, image(:,:,3), 'PixelValues', 'MeanIntensity');

I went to concatenate the data to get a 100 x 3 matrix

 rgb = [vertcat(r_data(:).MeanIntensity), vertcat(g_data.MeanIntensity), vertcat(b_data.MeanIntensity)]

Now my task is to figure out how to push this into regions(:).RGB. Why does this not work ?

regions(:).MeanIntensity = [rgb(:,1), rgb(:,2), rgb(:,3)];

How do I tell Matlab to convert my 2D array of 100x3 into a comma separated list of vector

Answer 1

[Walter Roberson]

rgbcell = mat2cell(rgb, ones(1, size(rgb,1)), size(rgb,2));
[regions(:).MeanIntensity] = rgbcell{:};