How to Edit Imported Notepad Values and Save the New Values

3 次查看(过去 30 天)
I want to import a row of data that looks like:
0.09 0.45 45 0 0.006 0.242 4.67 4 0.89925 1
Set them equal to variables in my GUI
Edit the variables
Save the new values over the old ones
Here is what I have:
[filename, path] = uigetfile('*.txt');
figure(app.UIFigure);
app.T = readtable(filename, 'Delimiter', 'space');
ct = app.T(:,1);
cr = app.T(:,2);
app.ctEditField.Value = table2array(ct);
app.crEditField.Value = table2array(cr);
(excluded the other 8 variable since it seems redunant)
Each value edit field has the same function
value = app.ctEditField.Value;
To edit the variables, I did this:
app.T.ct(1) = app.ctEditField.Value;
app.T.cr(1) = app.crEditField.Value;
Then I save them:
Q = table2array(app.T(:,:));
fileid = fopen('name.txt','w');
fprintf(fileid, '%6.5f\n' , Q);
This results in the following output in my text file where I am only changing the value for ct to 5. The original data is on top of the new data in a column. I do not have an error message to debug. How do I properly edit/save the data to only include the updated data as a row of numbers rather than a column of numbers?
0.09000
0.45000
45.00000
0.00000
0.00600
0.24200
4.67000
4.00000
0.89925
1.00000
5.00000
0.45000
45.00000
0.00000
0.00600
0.24200
4.67000
4.00000
0.89925
1.00000

回答(1 个)

Hornett
Hornett 2023-9-29
I understand you are facing problem while updating the already existing values in text file.
You can try using the "writematrix" function to write output data to text file.
Here is the sample code for writematrix usage:
M = magic(5)
writematrix(M,'mytxt.txt','Delimiter',' ')
For more detail you can refer to the following documentation page on writematrix function: https://www.mathworks.com/help/matlab/ref/writematrix.html
I hope this information resolves your query.

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