How do I import Data from a different folder?

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Dropbox406
Dropbox406 2014-12-13
回答： Suhas gowda 2023-5-6
So I can't change the directory of the data files so need a way of changing where matlab looks for the data.
The code I have so far is:
list = dir ('data_folder/*.dat'); |%where the .dat files are|
[~,index] = sortrows({list.date}.'); list = list(index); clear index |%Sorts them out by date|
for i = 1:length(list);
A(:,i) = importdata(list(i).name);
end
Thank you so much for your help!

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回答（3 个）

Image Analyst
Image Analyst 2014-12-13
Try this:
% Get path to a sub folder off the current working directory.
filePattern = full file(pwd, 'data_folder/*.dat');
list = dir (filePattern );
You can replace pwd by any hard coded string if you want, or else call uigetdir() to let the user browse.
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Dropbox406
Dropbox406 2014-12-17
fullFileName is C:\xx\xx\composite1.dat where it should be C:\xx\xx\data_folder\composite1.dat
How do I get it to add the data_folder part?
My code is:
filePattern = fullfile(pwd, 'data_folder/*.dat');
list = dir (filePattern );
[~,index] = sortrows({list.date}.'); list = list(index); clear index
for i = 1:length(list);
fullFileName = fullfile(pwd, list(i).name);
A(:,i) = importdata(fullFileName);
end
Currently get the error:
Error using importdata (line 136) Unable to open file.
Error in load_data_test (line 15) A(:,i) = importdata(fullFileName);
:(
Dropbox406
Dropbox406 2014-12-17
The other way to do it is to add 'data_folder/' in front of all the names of the file directories in the list, would that be easier?

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Thorsten
Thorsten 2014-12-17
Easy as
addpath('C:\xx\xx\data_folder\composite1.dat')
  2 个评论
Dropbox406
Dropbox406 2014-12-17
Problem is that I need to send it to a different computer so can't add the very specific 'C:\xx\xx\' part at the beginning as it will not run on other computers..
Thorsten
Thorsten 2014-12-17
编辑：Thorsten 2014-12-17
If it's just one other computer, just add both paths to your Matlab path. One path would be invalid on either computer, but this gives just a warning that you can savely ignore.

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Suhas gowda
Suhas gowda 2023-5-6
This works well for me
[file,path] = uigetfile('*.mat'); % opens file selection dialog box. You may choose data from different folder
A=importdata(strcat(path,file)); % data will be imported from the specified path

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