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Why looping just save the last value, not every loop ?

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gugum gumbira
gugum gumbira 2016-4-14
评论： gugum gumbira 2016-4-15
Dear all, I have .TXT data with name ZA000060.TXT, ZA000120.TXT, ZA000180.TXT, ZA000240.TXT, ZA000300.TXT. I load those data with these syntax
for k=60:60:300
aa = sprintf('%03d',k);
filename = sprintf('ZA000%03d.TXT', k);
ZA{k}=load(filename);
end
for k = 1:length(ZA)
x(:) = ZA{k};
% do stuff with x
end
but why the result just store the last data on ZA{k} ? not every data store after looping. how to fix this ?? any help would be great. Best regard,

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Stephen23
Stephen23 2016-4-14
编辑：Stephen23 2016-4-15
Try using a separate vector to store the values:
V = 60:60:300;
C = cell(size(V));
for k = 1:numel(V)
filename = sprintf('ZA000%03d.TXT', V(k));
C{k} = load(filename);
end
The original answer used the values of V directly as indices into the cell array, which produced lots of empty cells because only every sixtieth cell had something in it. This is not a good way to code, and it is not a very robust solution to use data values as indices.
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Stephen23
Stephen23 2016-4-15
编辑：Stephen23 2016-4-15
That was my mistake: I did not notice that you are trying to load text file, not a mat file. You should load the data into a cell array, exactly like the original answer:
C = cell(size(V));
for k = 1:numel(V)
filename = sprintf('ZA000%03d.TXT', V(k));
C{k} = load(filename);
end
For ascii data load does not return a structure, just a numeric matrix. This can be stored in the cell array.

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