saving in loop-- using eval or num2str?

Question

Nina 2012-7-20

1
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/44175-saving-in-loop-using-eval-or-num2str

I am creating 64 3D arrays out of one large array. On each iteration of the loop, I want to save only the file created in that loop. All of the code works great except the line with the save function. Since my array name is based off the eval function, I don't know how to refer to it in the save function. Also tried just using num2str function with the year (commented in code) with no luck. Is this possible to do and how is it done? Your help greatly appreciated!!

%separate event_int_all 3D array into 64 3D arrays based on year
ct=1;
for k=1:64;
    yr=1947+k;  
    eval(['events_',num2str(yr) '=NaN(66,6,60);']);
   for j=1:size(event_int_all,3);
        for i=1:size(event_int_all,1);
            if i==1 && j~=1 && event_int_all(i,1,j-1)~=k;
                ct=1;
            end%if1
            if isnan(event_int_all(i,:,j))==1;
                continue
            elseif i==1 && j~=1 && event_int_all(i,1,j-1)~=k;
                ct=1;
            elseif event_int_all(i,1,j)==k;               eval(['events_',num2str(yr),'(i,:,ct)','=event_int_all(i,:,j);']);
            else
                continue
            end%if2
        end%fori
        ct=ct+1;
    end%forj
    filename=['year_' num2str(yr) '.mat']; 
    save('filename', eval(['events_' num2str(yr)])); %!! doesn't work
    %also tried save('filename','events_' num2str(yr)) doesn't work
end%fork

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Answer 1

Jan 2012-7-20

2
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/44175-saving-in-loop-using-eval-or-num2str#answer_54201

编辑：Jan 2012-7-20

在 MATLAB Online 中打开

You can omit the evil EVAL. As you see it causes problems, as it ever does.

% eval(['events_',num2str(yr) '=NaN(66,6,60);']);
data = NaN(66,6,60);
% eval(['events_',num2str(yr),'(i,:,ct)','=event_int_all(i,:,j);']);
data(i,:,ct) = event_int_all(i,:,j);
% save('filename', eval(['events_' num2str(yr)]))
S = struct(sprintf('events_%d', y), data);
save('filename', 'S', '-struct');