How to convert a cell array of structures to array of structures

18 vues (au cours des 30 derniers jours)
ysz
ysz le 21 Déc 2016
Commenté : ysz le 22 Déc 2016
searchNode's nodeinfo is a cell array of structures.
nodeinfo = searchNode(neo4jconn, 'Comment')
nodeinfo.NodeData contains node data. It has a property key 'text'
>> nodeinfo.NodeData{1}.text
ans =
blahblah
Array of structures would be easier to work with and accesses can be vectorized
Please suggest a better than for loop:
s = size(nodeinfo.NodeData, 1);
for i = 1:s
comments(i).text = nodeinfo.NodeData{i}.text;
end
For example to collect text of all comments is now one-liner
text = [comments.text]
How can a cell array of structures be vectorized like that?

Réponse acceptée

Guillaume
Guillaume le 21 Déc 2016
As long as the structures in the cells have all the same fields and that these structures in the cells are either scalar or arrays with the same number of rows:
nodedata = [nodeinfo.NodeData{:}];
%or
nodedata = cell2mat(nodeinfo.NodeData);

Plus de réponses (1)

Image Analyst
Image Analyst le 21 Déc 2016
Will cell2struct() for for you?
  1 commentaire
ysz
ysz le 21 Déc 2016
Modifié(e) : ysz le 21 Déc 2016
cell2struct(nodeinfo.NodeData, {'text'}, 2) will return s x1 struct array with field text
whereas for loop creates 1x s array of structures

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