Updation of Cell Array
显示 更早的评论
I have a matrix of 100*400.I need to read a cell(from matrix), take its field as store it as a structure, update one field in the structure and put this new data back to the original cell with all the fields present, but only the updated field is present.Also, horizontal concatenation did not work out.Can I get any help regarding this?Thanks in advance!
1 个评论
Guillaume
2019-8-9
Your question title speaks of cell array, you then state that you have a matrix, then talk about structures. These are 3 different things, so it's really unclear what you're asking.
Please provide a small example of input and desired output. Also when saying that something doesn't work provide the (erroneous) code you're using and the full text of the error message.
采纳的回答
per isakson
2019-8-9
编辑：per isakson
2019-8-9
Is something like this what you are looking for? I don't quite understand what you tried.
Try this code
%% Sample data
cell_array = cell( 100, 400 );
ix_row = 117;
ix_col = 314;
S = struct( 'f1', 1, 'f2', 2, 'f3', 3 );
cell_array{ ix_row, ix_col } = S;
%% reference the content of cell(ix_row,ix_col)
>> sas = cell_array{ ix_row, ix_col }
sas =
struct with fields:
f1: 1
f2: 2
f3: 3
%% Update one field of the struct in the cell(ix_row,ix_col)
>> sas.f2 = 200;
>> cell_array{ ix_row, ix_col } = sas;
>> cell_array{ ix_row, ix_col }
ans =
struct with fields:
f1: 1
f2: 200
f3: 3
6 个评论
KK14
2019-8-9
per isakson
2019-8-9
编辑：per isakson
2019-8-9
I don't get you. The values of the fields, 'f1' and 'f3', are retrievable.
>> cell_array{ ix_row, ix_col }.f1
ans =
1
>> cell_array{ ix_row, ix_col }.f3
ans =
3
Or what do you mean by "other fields"?
An alternate way of modifying the value of one field
>> cell_array{ ix_row, ix_col }.f2 = 300;
per isakson
2019-8-9
编辑：per isakson
2019-8-9
cell_array = cell( 100, 400 );
x_row = 117;
Picking the value, 117, outside the interval, [1,100], was a mistake by me.
KK14
2019-8-10
per isakson
2019-8-10
"But I am unable to do so [i.e. retrieve the values of the fields, f1 and f3]" It's hard for me to tell why, since you provide so little information. I have no problem doing it in my example and I assume that you can successfully repeat my example. (I use R2018b.)
Show
- the value of the cell in question before the update (I assume it's a struct.)
- statement by statement how you update one field of the value of the cell in question
- the value of the cell in question after the update
- statement by statement how you try to retrieve the values of the fields that you didn't update
KK14
2019-8-10
更多回答（0 个）
类别
在 帮助中心 和 File Exchange 中查找有关 Multidimensional Arrays 的更多信息
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!
Translated by 
