store data from matrix rowwise in indexed structure
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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
采纳的回答
To create your matrix in the first place you went through two steps:
- Created a comma separated list out of your structure (simply by writing Sample(Select).YData)
- Concatenated together all the elements of the list into one matrix with vertcat
To do the inverse you have to reverse these steps
- Split the matrix into rows
- 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
3 个评论
Andrei Bobrov
2016-5-10
I agree with Guillaume. I deleted my answer.
Doreen
2016-5-10
Andrei Bobrov
2016-5-10
But working in Octave:
Sample(Select) = cell2struct(num2cell(Matrix,2),{'YData'},2);
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