MATLAB: How to dynamically create a struct

cellcreatedynamicfieldstruct

I want to create a struct with the number of fields decided based on some user input. What's a good way of doing this? Or should I be using a cell or matrix instead?

Thanks

Best Answer

a = struct ;
for i = 1:10
    a(i).x = i ;
    a(i).y = i+1 ;
end

It depends on how your structure is.

Related Solutions

MATLAB: How to create multiple fields in a structure simultaneously using dynamic field naming

Good news and bad news.

Good news, here's (kind of) what you want in one line of code.

S = cell2struct(num2cell(data), fieldnames, 2);

Bad news, is that S is a structure array whereas your 'struct' is a structure. If you want to access the first field in your variable,

struct.name1

If you want to access the first field of my variable,

[S.name1]'

These are identical vectors but since mine is a structure array, the syntax differs.

[ UPDATE, thanks to Walter Roberson's suggestion] Here's what you want in 1 line of code and in the format you need.

S = cell2struct(num2cell(data,1), fieldnames, 2);

MATLAB: How to create cell in the loop

CC = cell(1, 10);
for I = 1:10
  a = I;
  b = I + 1;
  tmpstruct = struct('a',a,'b',b);
  CC{I} = tmpstruct;
end

Best Answer

Related Solutions

MATLAB: How to create multiple fields in a structure simultaneously using dynamic field naming

MATLAB: How to create cell in the loop

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