How to create n arrays from a mxn matrix using mat2dataset
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Hi guys,
I'm using mat2dataset on a 100x100 matrix and i want to create 100 arrays of each column of the dataset. This is what i'm doing:
% y=100x100 matrix
s=mat2dataset(y);
y1=(ds.y1);
y1=y1.';
y2=(ds.y2);
y2=y2.'; ... %and so on
There must be a way to do this avoiding writing every single array!
Hope you can help me
Thanks!
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Accepted Answer
Steven Lord
on 17 Jun 2016
DON'T DO THIS.
Seriously, DO NOT DO THIS.
See question 1 in the Programming section of the FAQ for more information about why this is a Bad Idea. Dynamic field names (described in the FAQ question) work for dataset arrays just like they do for struct arrays, if I remember correctly.
5 Comments
Steven Lord
on 20 Jun 2016
You don't need to use a dataset here. Just use a for loop iterating over the columns of y, and store the results of each iteration through the for loop in an element of the cell arrays u, v, and w.
y = randi(10, 1, 20);
C = cell(1, 20);
for k = 1:20
C{k} = magic(y(k));
end
C is a cell array whose nth cell contains the magic square matrix of size y(n) [or a specific 2-by-2 matrix if y(n) is 2, even though that matrix doesn't satisfy the requirements to be a magic square.]
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