save the loop data in a if else statement

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SUSHMA MB
SUSHMA MB 2018-4-3
评论： SUSHMA MB 2018-4-4
I have an if statement
for ind = 1:MAX_ITER
if(mod(ind, 1500) == 0)
h = findobj(gca,'Type','line');
x=get(h,'Xdata');
y=get(h,'Ydata');
z=[x,y];
H_XX = z{2,1};
H_YY = z{2,2};
filename=['test',num2str(ind),'.mat'];
save(filename)
end
end
How can i save the 'H_XX' and 'H_YY' of the entire loop in a single file ?

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采纳的回答

KSSV
KSSV 2018-4-3
count = 0 ;
iwant = cell([],1) ;
for ind = 1:MAX_ITER
if(mod(ind, 1500) == 0)
h = findobj(gca,'Type','line');
x=get(h,'Xdata');
y=get(h,'Ydata');
z=[x,y];
H_XX = z{2,1};
H_YY = z{2,2};
count = count+1 ;
iwant{count,1} = [H_XX H_YY] ;
end
end
iwant = cell2mat(iwant) ;
iwant gives you data when the loop goes inside if. You can save it into a file you want.

更多回答（1 个）

Stephen23
Stephen23 2018-4-3
编辑：Stephen23 2018-4-3
It is simpler to avoid generating too many values (and then using mod to select which values you want to use) because then you can trivially preallocate an output array of the correct size:
vec = 1500:1500:MAX_ITER;
out = cell(numel(vec),2);
for k = 1:numel(vec)
...
out(k,:) = [x,y];
end
save('test.mat','out')
This trivially avoids expanding the output array on each iteration:
https://www.mathworks.com/help/matlab/matlab_prog/preallocate-memory-for-a-cell-array.html
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Stephen23
Stephen23 2018-4-4
@SUSHMA MB: sure, that is what my code shows you.

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