How to convert a structure into a individual double elements

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!

Answer 1

[Image Analyst]

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?

[T Path]

I had a bit of a rough time loading data from a .mat file. This method works like a charm.

Answer 2

[grapevine]

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

Answer 3

[Andrei Bobrov]

Try this is code

A = struct2cell(yourstructdata);
out = cat(2,A{:});

[Eli]

Very nice solution

[burak enes]

super duber solution

[Talha]

best

Answer 4

[Irwansyah Ramadhani]

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

[Image Analyst]

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

Answer 5

[Mayss Aliyeh]

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?

Answer 6

[Mark Brandon]

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(:)]

Answer 7

[Asi angel]

Question

How to change struct 1x2 to double 1x1?

[Image Analyst]

You can't unless you throw away everything except for one scalar double value.

[Merve Buyukbas]

Arrays of structures work the same as regular arrays. Use indexing to access individual items for change:

[Image Analyst]

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]

"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.