How to access different FIELD in structure using CELLFUN

Question

balandong 2017-11-28

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/369751-how-to-access-different-field-in-structure-using-cellfun

回答： balandong 2017-11-30

help_strcCellFun.mat

Dear all, the objective was to access multiple fields (3 fields) located in multiple cell container. CELLFUN was used to make the coding more compact. The data from the 3 fields from each cell were then combine in a matrix. The code below demonstrated clearly what I tried to achieve. However, as can be seen below, the code is very lengthy. I wonder if this code can be further simplified by utilizing the CELLFUN, or any suitable FUNCTION. I really appreciate for any tips.

The end result should that like EachComb CELL

load('help_strcCellFun.mat');
vec_SBN_table=cellfun(@(S) S.SBN, result, 'uni',true);
nSizeComb=size(vec_SBN_table,2); % Equal to s.TotalCombntn
C_x=1;
for f_x=1:nSizeComb
xx_TPR{C_x}= vec_SBN_table(f_x).TPR ; 
xx_TNR{C_x}= vec_SBN_table(f_x).TNR ; 
xx_ACC{C_x}= vec_SBN_table(f_x).ACC ; 
C_x=C_x+1;
end
nSizeCPT_ROW=size(s.CptPair,1);
yy_SeqNo=repmat((1:nSizeCPT_ROW)',1,s.TotalCombntn);
yy_TPR=reshape(horzcat(xx_TPR{:}),nSizeCPT_ROW,[]);
yy_TNR=reshape(horzcat(xx_TNR{:}),nSizeCPT_ROW,[]);
yy_ACC=reshape(horzcat(xx_ACC{:}),nSizeCPT_ROW,[]);
EachComb=cell(nSizeComb,1);
for f_x=1:nSizeComb
    comb(:,1)=yy_SeqNo(:,f_x); % Sequence No
    comb(:,2)=yy_TPR(:,f_x);
    comb(:,3)=yy_TNR(:,f_x);
    comb(:,4)=yy_ACC(:,f_x);
    EachComb{f_x,1}= comb;
end

2 个评论
显示无隐藏无

per isakson 2017-11-30

I don't think the mat-file matches the code. For example, it doesn't contain S.SBN

balandong 2017-11-30

在 MATLAB Online 中打开

Hi Per, The capital S is the Variable (I am dont know the actual name for it) similar to x as in the following line.

Cpositives = cellfun(@(x) x(x>0), C, 'UniformOutput',false);

请先登录，再进行评论。

请先登录，再回答此问题。

Answer 1

balandong 2017-11-30

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/369751-how-to-access-different-field-in-structure-using-cellfun#answer_293986

在 MATLAB Online 中打开

The following line were much more shorter than the originally proposed.

load('help_strcCellFun.mat');
vec_SBN_TPR=cellfun(@(S) S.SBN.TPR, result, 'uni',false);
vec_SBN_TNR=cellfun(@(S) S.SBN.TNR, result, 'uni',false);
vec_SBN_ACC=cellfun(@(S) S.SBN.ACC, result, 'uni',false);
endExtractedData = arrayfun(@(k)  [vec_SBN_TPR{k}; vec_SBN_TNR{k};vec_SBN_ACC{k}]',1:s.TotalCombntn,'un',0);