How will my program read large data in a loop?

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Prakriti Sardana
Prakriti Sardana am 16 Jun. 2015
Bearbeitet: Stephen23 am 23 Jun. 2015
I have data sets for about a 1000 objects. Each data set is a matrix with 'different no. of rows for each * 2 columns' as the matrix order. Now, I have called all the data sets in my current folder using:
files = dir('*.txt');
for i=1:length(files)
eval(['load ' files(i).name ' -ascii']);
end
which stores them as matrices X1, X2, et al. I need to assign each column of each matrix to a different variable for each, in a loop because writing separately for each object is not possible given the large number of data sets.
How do I do that?
  1 Kommentar
Stephen23
Stephen23 am 23 Jun. 2015
Bearbeitet: Stephen23 am 23 Jun. 2015
Avoid using eval for such trivial code. Learn to not use eval and your code will be more robust and easier to read.... Read this to know why:

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Walter Roberson
Walter Roberson am 16 Jun. 2015
I suggest something like
files = dir('*.txt');
data = cell(length(files),2);
for i=1:length(files)
thisdata = load(files(i).name, '-ascii');
data{i,1} = thisdata(:,1);
data{i,2} = thisdata(:,2);
end
  2 Kommentare
Prakriti Sardana
Prakriti Sardana am 23 Jun. 2015
Bearbeitet: Prakriti Sardana am 23 Jun. 2015
Hm, thank you very much for your continued help.
Jan
Jan am 23 Jun. 2015
@Prakriti Sardana: There is always a better solution than eval.

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