store data from matrix rowwise in indexed structure

Hello everyone, I have a structure 'Sample', which contains many objects (over 1000) with the same attributes. For example sample specific data is stored as a 1x2090 vector under Sample([]).YData. If I want to extract the 'YData' of sample 1 to 151 and store it in a matrix, I simply write

Select = 1:151; YData = vertcat(Sample(Select).YData);

Now I want to write selected data back to structure... Each row of a matrix should be written to the 'YData' of the corresponding sample.

Sample(Select).YData = Matrix;

doesn't work. Is there a way to implement this task in such a simple way or will only a for-loop do this job? Thanks

Answer 1

[Guillaume]

To create your matrix in the first place you went through two steps:

1. Created a comma separated list out of your structure (simply by writing Sample(Select).YData)
2. Concatenated together all the elements of the list into one matrix with vertcat

To do the inverse you have to reverse these steps

1. Split the matrix into rows
2. deal these rows to the structure

Unfortunately, it can't be done as a one-liner, you have to use a temporary variable

rows = num2cell(Matrix, 2); %split matrix into rows 
[Sample(Select).YData] = rows{:}; %distribute rows into structure

[Andrei Bobrov]

I agree with Guillaume. I deleted my answer.

[Doreen]

Great :-) Many thanks!

[Andrei Bobrov]

But working in Octave:

Sample(Select) = cell2struct(num2cell(Matrix,2),{'YData'},2);