Prev: plotting multiple objects on the same figure
Next: Spectrum Sharing
From: Walter Roberson on 8 Jul 2010 11:07
Jay WONG wrote:
> hi, I created the following code but failed with this message
> "Subscripted assignment between dissimilar structures."
> Please advise what went wrong
> Thank you
>
>
>
> =============
> TYPE=zeros(100,1);
> OK=zeros(100,1);
> CUBE_DATA(17, 16, 19)=struct();

That initializes CUBE_DATA to be an array of structures with no fields.


> S=struct('C1',TYPE,'C2',OK);
> CUBE_DATA(1, 1, 1)=S;

That tries to assign a structure with fields into the array of
structures with no fields.

When you assign a complete structure into an array of structures, then
the structure being assigned from must have the same fields in _exactly_
the same order as the structure being assigned into. This differs from
assigning to a _field_ of a structure: if you assign to a _field_ of a
structure, then the field will automatically be created if it does not
already exist.

I suggest you use

CUBE_DATA(17, 16, 19) = struct('C1',TYPE,'C2',OK);

This will initialize the structure fields for all of the array members;
if your code had worked, it would have only initialized the structure
fields for the _first_ array member.
From: Jay WONG on 8 Jul 2010 11:30
"Jan Simon" <matlab.THIS_YEAR(a)nMINUSsimon.de> wrote in message <i14p7r$ilt$1(a)fred.mathworks.com>...
> Dear Jay,
>
> > I created the following code but failed with this message "Subscripted assignment between dissimilar structures."
>
> > TYPE=zeros(100,1);
> > OK=zeros(100,1);
> > CUBE_DATA(17, 16, 19)=struct();
>
> Now CUBE_DATA is a [17 x 18 x 19] struct array with *no* fields.
>
> > S=struct('C1',TYPE,'C2',OK);
> > CUBE_DATA(1, 1, 1)=S;
>
> Now you want to set the first element of the struct array to a struct *with* some fields. That is simply not possible.
> You can pre-allocate CUBE_DATA e.g. by defining the last element at first or using STRUCT with cells as input data.
>
> Good luck, Jan


hi Jan,

This is what I intend to do:

1)I would like to create a 3D struct array of size (17x16X91), empty field in the first place.

2)Then, I would like to assign my complex struct arrays of size(1X1) to each unit in that 3D array. How do I accomplish this?

thank you,

Jay
From: Jan Simon on 8 Jul 2010 11:56
Dear Jay,

> This is what I intend to do:
> 1)I would like to create a 3D struct array of size (17x16X91), empty field in the first place.
> 2)Then, I would like to assign my complex struct arrays of size(1X1) to each unit in that 3D array. How do I accomplish this?

Simply use another language than Matlab. Not kidding. You have to create the struct array with the correct fields initially.
Perhaps using a cell is better in your case, because elements of a cell are allowed to be as different as you wish.

Kind regards, Jan
From: Jay WONG on 8 Jul 2010 15:24
Dear Jan,

I modified a bit. Now I initiated the field first and would like to concatenate two structs into one struct, but still failed.

Could you explain why?

======================================

CUBE_DATA(17,16,91)=struct('C1', TRADE_ID(2,1),'C2',INDUSTRY_LABEL(2,1),'C3', TENOR(2,1),'C4', TIME_TO_MATURITY(2,1),'C5',TYPE(2,1),'C6',SERIES(2,1),'C7', NOTIONAL(2,1),'C8', MATCHED_STATUS(2,1),'C9', SUBMITTED_STATUS(2,1));

TEMP=struct('C1', TRADE_ID(2,1),'C2',INDUSTRY_LABEL(2,1),'C3', TENOR(2,1),'C4', TIME_TO_MATURITY(2,1),'C5',TYPE(2,1),'C6',SERIES(2,1),'C7', NOTIONAL(2,1),'C8', MATCHED_STATUS(2,1),'C9', SUBMITTED_STATUS(2,1));

CUBE_DATA(17,16,91)=('F1',TEMP,'F2',CUBE_DATA(17,16,91));

======================================

"Jan Simon" <matlab.THIS_YEAR(a)nMINUSsimon.de> wrote in message <i14sek$j9r$1(a)fred.mathworks.com>...
> Dear Jay,
>
> > This is what I intend to do:
> > 1)I would like to create a 3D struct array of size (17x16X91), empty field in the first place.
> > 2)Then, I would like to assign my complex struct arrays of size(1X1) to each unit in that 3D array. How do I accomplish this?
>
> Simply use another language than Matlab. Not kidding. You have to create the struct array with the correct fields initially.
> Perhaps using a cell is better in your case, because elements of a cell are allowed to be as different as you wish.
>
> Kind regards, Jan
From: Walter Roberson on 8 Jul 2010 15:35
Jay WONG wrote:

> I modified a bit. Now I initiated the field first and would like to
> concatenate two structs into one struct, but still failed.
>
> Could you explain why?

> CUBE_DATA(17,16,91)=('F1',TEMP,'F2',CUBE_DATA(17,16,91));

'F1',TEMP,'F2', is not a structure and so cannot be concatenated with the
structure CUBE_DATA(17,16,91) .

If you were to code

CUBE_DATA(17,16,91)=struct('F1',TEMP,'F2',CUBE_DATA(17,16,91));


then you would be attempting to change the structure fields for the single
structure array element CUBE_DATA(17,16,91) and that is not permitted.

As I wrote in my earlier response,

"When you assign a complete structure into an array of structures, then the
structure being assigned from must have the same fields in _exactly_ the same
order as the structure being assigned into. This differs from assigning to a
_field_ of a structure: if you assign to a _field_ of a structure, then the
field will automatically be created if it does not already exist."
First  |  Prev  |  Next  |  Last
Pages: 1 2 3
Prev: plotting multiple objects on the same figure
Next: Spectrum Sharing