Create cell with vector from looping trough struct

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Tor Aarskog 2020-5-16

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https://ww2.mathworks.cn/matlabcentral/answers/525972-create-cell-with-vector-from-looping-trough-struct

评论： Tor Aarskog 2020-5-22

Hello. I have a struct, 1x30, each field has a 1*X columns with index values. some fields are also empty. Im trying to greate a vector, which goes from each index value + 100index points. Then save this as a cell containing a vector ranging from indexvalue to indexvalue +100. for all columns within the 30 fields. Looking at the picture below, indexstruct.col_5, i need a vector going from

149111, 149112,149113....149211

385351, 385352, 385353,.....385451

and so on for all 168 columns in indexstruct.col_5 but also for all columns in col_1 to col_30.

The vectors are then to be used to findi maxvalue within each index-range, ranging from start to 100 indexpoints later. indexvalues correspond to time in an acceleration time history.

Gratefull for any help i can get!

For what its worth im posting my code below. Although I belive its pretty far from achiving what i want.

vec2={}
fn = fieldnames(indexstruct);
for k=1:numel(fn) %looping through struct
    for i = length(indexstruct.(fn{k}))
        
    vec2 = (indexstruct.(fn{k})(:,i)):indexstruct.(fn{k})(:,i)+100;
    vec2= {vec2;vec2(k)};
    end
end

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Stephen23 2020-5-16

Using numbered fields makes accessing your data more complex than it needs to be. Much simpler:

a non-scalar structure
a cell array.

Both of these would make accessing your data easier.

Tor Aarskog 2020-5-22

在 MATLAB Online 中打开

Hi, Thanks for you advice, do you have any further specific advice on how i could alter the code ?

x=Veracity6raw.y(:,:); % 3686400x30 matrix
indexstruct=struct;
indexvec=[];
j=1;
index=1;
runloop=true;
i=0;
while runloop
    i=i+1;
    if index+100>length(x)
        index=1;
        ind_col=['col_' num2str(j)];%make new struct field name 
        indexstruct.(ind_col)=indexvec;% Make new field in struct for indexvec with column number
        indexvec=[]; %make indexvec empty for new column
        j=j+1;
        if j>size(x,2)%If j is larger than numbers of columns, break loop 
            break
        end 
    end
    vec1=x(index:index+100,j);
    if std(vec1)>std_tol(j) 
        indexvec=[indexvec,index];
        index=index+100;
    else
        index=index+10;
 
    end
end

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Create cell with vector from looping trough struct

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