Opening a Textfile in MATLAB Appdesigner Online

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I
I 2022-4-27
编辑： I 2022-5-1
I wrote data in matlab online and saved it as a textfile and I want to open that data in appdesigner online.
function InputDataButtonPushed(app, event)
[filename, path] = uigetfile('*.txt'); % Choose the file to open
if isequal(filename,0);
return
end
figure(app.UIFigure);
T = fopen(filename);
I am not getting an error code, but this is what it says for T
T =
3
and this is what I have for T in the file:
1 1 1
I do not have an error message, so I really do not know what I am doing wrong.
I just want to open up the data into my numeric edit fields.

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回答（1 个）

Voss
Voss 2022-4-27
fopen merely opens a file so that subsequent code can read from or write to the file.
To read the contents of a file into a variable, you might try readmatrix or another function, depending on the contents of your file.
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Voss
Voss 2022-4-29
T = readmatrix(filename); % Input data set 1
reads the file filename into the variable T.
If you want your GUI to update somehow after this happens, you have to tell it to do so. For instance:
T = readmatrix(filename); % Input data set 1
% use your edit field's name.
% use what you want from T.
app.my_edit_field.Value = T(1);
I
I 2022-5-1
编辑：I 2022-5-1
Right, well I added these lines and then I have this error for it.
Are you able to explain why I am not able to just directly read in the data from the textfile using this function?
app.Var1EditField.Value = T(1,1);
'Value' must be a double scalar within the range of 'Limits'.
app.Var1EditField.Value = T(1);
'Value' must be a double scalar within the range of 'Limits'.

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