Converting structs within cells to cells

I have a 20x1 cell (X) where each cell element contains a 16x1 struct. There is only one field throughout any of the structs ('Coordinates', a matrix with 3 columns but varying number of rows). I would like to convert this into a 20x16 cell, where each cell element is the Coordinate matrix. I've tried many different things and nothing gives me quite what I want.

1. squeeze(struct2cell(X{1})) gives me a 16x1 cell where each cell containts a Coordinate matrix. I tried looping through the contents all 20 rows of cell X in hopes of horizontally concatenating the output, and no luck. This also doesn't work:

A = cell(16,20)

for i = 1:20

[A{:,i}] = squeeze(struct2cell(X{i}));

end

The resulting error: Error using squeeze Too many output arguments.

2. Also tried the following:

B = cell2mat(X);

C = cell(16,20);

[C{:}] = B.Coordinates;

This actually did give me a 16x20 cell, but the contents aren't right! I checked the dimensions of the matrices within the cells against the dimensions in the original structs within cells (Variable X), and they don't match!

If anyone could explain what I am doing wrong here, I would really appreciate it!

Answer 1

[Layla]

Mistake found. Method #2 would work as long as my preallocated cell C was the right size. It should've been cell(20,16). Then transposing the output of [C{:}] = B.Coordinates gives me the answer I need.

Thank you again for your help Walter. This isn't the first question of mine you've helped me on!

Answer 2

[Walter Roberson]

cellfun(@(C) horzcat(C.coordinates), X)

[Layla]

No luck there either:

Error using horzcat

CAT arguments dimensions are not consistent.

Error in @(C)horzcat(C.ClusterCoordinates)