How to convert a structure into a individual double elements

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Artu
Artu el 25 de Jun. de 2012
Comentada: Talha el 28 de Dic. de 2023
Hello all,
I have a structure containing ten "8760x1 double" I need to do some descriptive statistical analysis for each group of data. I want to convert this structure into ten dettached differents elements. How can I do this? I have tried struct2cell and I get one 10x1 cell but then I don't know how to dettach each group of data out of this.
Thanks for your help!

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Image Analyst
Image Analyst el 25 de Jun. de 2012
Why not just simply do
vector1 = yourStruct.vector1;
vector2 = yourStruct.vector2;
vector3 = yourStruct.vector3;
vector4 = yourStruct.vector4;
vector5 = yourStruct.vector5;
vector6 = yourStruct.vector6;
vector7 = yourStruct.vector7;
vector8 = yourStruct.vector8;
vector9 = yourStruct.vector9;
vector10 = yourStruct.vector10;
which is very easy, intuitive, and straightforward?
  1 comentario
T Path
T Path el 12 de Dic. de 2015
I had a bit of a rough time loading data from a .mat file. This method works like a charm.

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Más respuestas (6)

grapevine
grapevine el 25 de Jun. de 2012
there are different ways to sort out your issue
you might use:
C= struct2cell(s)
and then
A= cell2mat(C)
another way is to write a small code with a loop to copy all the elements of the structure in an array, for example
s = struct('f1', [1, 3, 2, 4])
a=[]
lenS=length(s.f1)
for i=1:1:lenS
a=[ a s(f1)]
end
good luck

Andrei Bobrov
Andrei Bobrov el 25 de Jun. de 2012
Try this is code
A = struct2cell(yourstructdata);
out = cat(2,A{:});
  3 comentarios

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Irwansyah Ramadhani
Irwansyah Ramadhani el 5 de Jun. de 2016
I have a struct 2x1 and I want to write it's contain to excel directly. So, I want to ask the way to do it. Thank you
  1 comentario
Image Analyst
Image Analyst el 5 de Jun. de 2016
Call xlswrite for each member of the structure. You have to get a numerical array or a cell array of strings. If you don't know how to do that then tell us what the structure of your structure is.
Also, you might read this: the FAQ

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Mayss Aliyeh
Mayss Aliyeh el 19 de Mayo de 2017
What if in the struct I have 7 fields, and all of them are different sizes of doubles? I want to use them for the svmtrain. How can I solve my problem?

Mark Brandon
Mark Brandon el 5 de Dic. de 2017
Consider a struct A, with fields a and b, each with a column of elements. You can convert the fields into column vectors using the following:
aVec = [A.a(:)] bVec = [A.b(:)]

Mohammad Basil
Mohammad Basil el 23 de Mzo. de 2021
Question
How to change struct 1x2 to double 1x1?
  4 comentarios
Image Analyst
Image Analyst el 24 de Mzo. de 2021
Yes, but note that s1 and s2 are still structures, not a double 1x1:
s = struct('f1', {5;6}, 'f2', {'aaa'; 'bbb'})
whos s
s1 = s(1)
s2 = s(2)
whos s1
s =
2×1 struct array with fields:
f1
f2
Name Size Bytes Class Attributes
s 2x1 572 struct
s1 =
struct with fields:
f1: 5
f2: 'aaa'
s2 =
struct with fields:
f1: 6
f2: 'bbb'
Name Size Bytes Class Attributes
s1 1x1 350 struct
Now if you wanted one of the doubles that is in one of the fields of one of the structures in the structure array, say the 5 from the f1 field of the first structure, you could do
% Pull out the 5 from the f1 field of the first structure in the array of structures.
scalarDouble = s(1).f1
whos scalarDouble
scalarDouble =
5
Name Size Bytes Class Attributes
scalarDouble 1x1 8 double
Stephen23
Stephen23 el 24 de Mzo. de 2021
Editada: Stephen23 el 25 de Mzo. de 2021
"How to change struct 1x2 to double 1x1?"
Clearly this is a MATLAB riddle, which is rather nice. One solution is:
'struct 1x2'
ans = 'struct 1x2'
ans(:) = ans-[15,5,-3,19,-9,15,0,0,0,1]
ans = 'double 1x1'
Note how it changes the data, exactly as requested. CODY enthusiasts can add their own solutions.

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