Finding min and max values in a structure

Question

L'O.G. 2022-11-28

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https://ww2.mathworks.cn/matlabcentral/answers/1865908-finding-min-and-max-values-in-a-structure

评论： Voss 2022-11-28

For a 1x1 structure with multiple fields, each field consisting of a cell of numbers, how can you find the minimum and maximum values over the entire structure?

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Answer 1

David Hill 2022-11-28

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https://ww2.mathworks.cn/matlabcentral/answers/1865908-finding-min-and-max-values-in-a-structure#answer_1114528

在 MATLAB Online 中打开

d=struct2cell(yourStruct);
m=0;M=0;
for k=1:length(d)
   m=min([m,d{k}]);
   M=max([M,d{k}]);
end

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L'O.G. 2022-11-28

I get an error for both lines in the loop:

`Invalid data type. First argument must be numeric or logical.`

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Answer 2

Matt J 2022-11-28

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https://ww2.mathworks.cn/matlabcentral/answers/1865908-finding-min-and-max-values-in-a-structure#answer_1114568

编辑：Matt J 2022-11-28

在 MATLAB Online 中打开

each field consisting of a cell of numbers

If you really do mean a cell array, that seems like an inadvisable organization of the data. You should probably have each field be a numeric matrix.

yourStruct.a=[1,2];
yourStruct.b=[3 4; 
              5 6];
Max = max( structfun(@(z)max(z,[],'all'), yourStruct) )
Max = 6
Min = min( structfun(@(z)min(z,[],'all'), yourStruct) )
Min = 1

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Answer 3

Voss 2022-11-28

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1865908-finding-min-and-max-values-in-a-structure#answer_1114728

编辑：Voss 2022-11-28

在 MATLAB Online 中打开

"a 1x1 structure with multiple fields, each field consisting of a cell of numbers"

yourStruct.a={1,2};
yourStruct.b={3 4; 
              5 6};
Max = max( structfun(@(z)max([z{:}],[],'all'), yourStruct) )
Max = 6
Min = min( structfun(@(z)min([z{:}],[],'all'), yourStruct) )
Min = 1

Another way:

d = struct2cell(yourStruct);
m = NaN;
M = NaN;
for k = 1:numel(d)
    m = min([m,d{k}{:}]);
    M = max([M,d{k}{:}]);
end
disp(M);
     6
disp(m);
     1

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Voss 2022-11-28

@Sean de Wolski: This answer is not a copy of the other answers. This answer uses the methods proposed by the other answers, adapted to work for a structure of cell arrays of numbers (as opposed to a structure of numeric arrays, which the other answers work for), which is the description given in the question, and which neither other answer works for.

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