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How to open data file by browsing it - MATLAB GUI

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Ekin
Ekin on 27 Aug 2013
Answered: Ka Mirul on 20 Nov 2017
I can open my data file with this code:
fp= fopen('ecg.txt','rt');
fgets(fp);
A = textscan(fp, '%f');
fclose(fp);
result=A{:};
%....Function....
But it can only open the ecg.txt file. how can i open another data file by browsing it? I tried this one:
[filename1,filepath1]=uigetfile({'*.txt*','Text Files'},...
'Select Data File 1');
cd(filepath1);
opener1=load([filepath1 filename1]);
fp= fopen('filename1','rt');
fgets(fp);
A = textscan(fp, '%f');
result=A{:};
%....Function....
But getting errors and can't fix. Can anyone help? Thanks in advance!

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Accepted Answer

Ekin
Ekin on 27 Aug 2013
Alright i solved this problem:
[filename1,filepath1]=uigetfile({'*.txt*','Text Files'},...
'Select Data File 1');
cd(filepath1);
fp= fopen(filename1);
fgets(fp);
A = textscan(fp, '%f');
fclose(fp);
result=A{:};
Now it is working.

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More Answers (3)

Iain
Iain on 27 Aug 2013
Edited: Iain on 27 Aug 2013
If you use:
cd(filepath1);
You shouldn't need to use "filepath1" again.
opener1=load([filename1]); %reads matlab files - if you open it with "fopen", you don't need to use this line.
Remember to close the file once you've read it.
AND, importantly, since you change directory, your code might be no longer accessable. You need to ensure that your code is on the matlab path.

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Ekin
Ekin on 27 Aug 2013
I changed to this one:
[filename1,filepath1]=uigetfile({'*.txt*','Text Files'},...
'Select Data File 1');
% cd(filepath1);
opener1=load([filepath1 filename1]);
fp= fopen('filename1','rt');
fgets(fp);
A = textscan(fp, '%f');
fclose(fp);
result=A{:};
But i get this error on fgets function:
Error using fgets Invalid file identifier. Use fopen to generate a valid file identifier.
Iain
Iain on 27 Aug 2013
OK, try:
fp = fopen([filepath1 '\' filename1],'rt)

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Ka Mirul
Ka Mirul on 20 Nov 2017
I found a video that help me, it is about creating GUI to browse an image and display the image and its name. It should help you : https://youtu.be/7EmFShs5y9I

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Vishal Rane
Vishal Rane on 27 Aug 2013
Is there a particular reason to both load and textscan the file ? While loading use the '-ascii' argument to force loading of non-mat files. Also the quotes around filename1 in fopen must be removed.
Run your code in a try-catch to enable better debugging.

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