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How to add an array in a structure as a new field?

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Nut
Nut 2016-7-29
评论： Nut 2016-8-1
Hi,
I'm using the following code to get a structure variable stats, that will have 23 + 1 = 24 fields.
stats = regionprops(bw,'All');
[labeled, nObject] = bwlabel(bw);
for i = 1:nObject
stats(i).Ratio = stats(i).MinorAxisLength/stats(i).MajorAxisLength;
end
The for loop is too slow, because I'm dealing with a huge number of regions, and I have to speed up my code. I tried with this line:
stats(:).AxisRatio=[stats.MinorAxisLength]'./[stats.MajorAxisLength]';
and many others, with no success.
Therefore, is there a way to add the 24th field to the structure more rapidly? In other words, I need the reverse operation than:
prop_array = [struct.prop_field]';
Thanks for your answers.

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采纳的回答

James Tursa
James Tursa 2016-7-29
E.g.,
c = num2cell([stats.MinorAxisLength]./[stats.MajorAxisLength]);
[stats.Ratio] = c{:};

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