structures consolidation and manipulations

Hello I have a basic question on structures I have a struct a which can contain n fields So for example

a(1)
=
mydata:[135x6]
myid:{1x6}
mydates = [135x1]
mytel=
myname=
etc
and so on for a(2), a(3)...etc to m

I want to then do some manipulation on the data say my own function transform which takes a(1) as an input and produces a(1).stats

Then I want to consolidate all my m objects into one big structure say BigStruct that has all the fields that a had plus the stats

such that

BigStruct =
mydata =[135x1000]
mydates = [135x1000]
etc
etc
Again I am doing all this in a for loop and was wondering if there is an easier elegant method to do this
Thanks so much

[Azzi Abdelmalek]

Are you looking for elegant way or fastest way?

[Azzi Abdelmalek]

You did not specify if the concatenation is always horizontal or vertical?

Answer 1

[Walter Roberson]

   Tstats = arrayfun( @(K) yourStats(a(K)), 1:length(a), 'Uniform', 0);
   T1 = struct2cell(a(:));
   T2 = cat(2, T1);
   T3 = horzcat(T2, Tstats);

Now use cell2struct() or the like to convert 32 back into a cell with appropriate field names e.g. [fieldnames(a); {'stats'}]

Watch out though for the dimension you concatenate on for mydata: somehow you went from 1000 of (135 x 6) to a single 135 x 1000 leaving us uncertain what happened to the x 6.

[hdg D]

Thank you!

Answer 2

[Azzi Abdelmalek]

For vertical concatenation

names=fieldnames(a);
for k=1:numel(names)
  b.(names{k})=cat(1,a(:).(names{k}));
end
b

[hdg D]

Thank you !