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How to fix this error?

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wyeen chow
wyeen chow on 16 Dec 2020
Edited: Cris LaPierre on 16 Dec 2020
Hi, I had facing this problem. I try to compute the GUI and it comes out this error.

Accepted Answer

Image Analyst
Image Analyst on 16 Dec 2020
fm is not a simple one line edit text box like you thought. In guide, you had two lines for it, so the get() call returns a cell array instead of a character array. Here, get your values in the run callback like below. I'm also attaching a fixed version of your program.
% Get the contents of the edit fields.
editFieldContents = handles.fm.String;
if isempty(editFieldContents)
warningMessage = sprintf('fm is empty. Please enter a value for it');
uiwait(warndlg(warningMessage));
return;
end
val1 = str2double(editFieldContents);
editFieldContents = handles.fc.String;
if isempty(editFieldContents)
warningMessage = sprintf('fc is empty. Please enter a value for it');
uiwait(warndlg(warningMessage));
return;
end
val2 = str2double(editFieldContents);
editFieldContents = handles.EM.String;
if isempty(editFieldContents)
warningMessage = sprintf('EM is empty. Please enter a value for it');
uiwait(warndlg(warningMessage));
return;
end
val3 = str2double(editFieldContents);
editFieldContents = handles.EC.String;
if isempty(editFieldContents)
warningMessage = sprintf('EC is empty. Please enter a value for it');
uiwait(warndlg(warningMessage));
return;
end
val4 = str2double(editFieldContents);
editFieldContents = handles.RESIS.String;
if isempty(editFieldContents)
warningMessage = sprintf('RESISTANCE is empty. Please enter a value for it');
uiwait(warndlg(warningMessage));
return;
end
val5 = str2double(editFieldContents);

More Answers (2)

KSSV
KSSV on 16 Dec 2020
If you want to open .fig file.
openfig('DSBSCfig.fig')
If you want to run the .m file, open it and press F5 or press the run button. Or you be in the directory where the DBSCfig.m file is present and type
DBSCfig

Cris LaPierre
Cris LaPierre on 16 Dec 2020
Edited: Cris LaPierre on 16 Dec 2020
In checking your gui, the issue is you have given both the label and the edit field the same tag (fm for example). So when you run the command get(handles.fm,'String'), you get the string property of both objects.
K>> get(handles.fm,'String')
ans =
2×1 cell array
{'"0"' }
{'Frequency Modulate(fc)'}
I suggest updating your tags so that no two objects use the same tag.
  1 Comment
Image Analyst
Image Analyst on 16 Dec 2020
For robustness, you might assume that if it's a cell array, to get the first (or last) entry:
editFieldContents = handles.fm.String;
if iscell(editFieldContents)
% Extract first string.
editFieldContents = editFieldContents{1}; % or editFieldContents{end}; depending on what you want.
% Put that one string back into the edit field.
handles.fm.String = handles.fm.String;
end

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