Matlab textArea automatic new line issue

Question

Leon 2021-3-14

0
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https://ww2.mathworks.cn/matlabcentral/answers/772108-matlab-textarea-automatic-new-line-issue

回答： Leon 2021-3-16

I'm trying to generate a list of items. For each research cruise, its Year, Month, Day, Longitude, Latitude, etc. should all be in one row. Here is my code:

% generate the cruise list:
app.textArea.Value = '';
AA = [];
for i = 1:numel(cruiseList)
    Ind1 = VAR(:,6) == cruiseList(i);
    if sum(Ind1)>0
        AA = [AA, 'Cruise #', num2str(cruiseList(i)), ', Year: ', ...
            Sta{Ind1}.year, ', Month: ', Sta{Ind1}.month, '.'];
    end
end
app.textArea.Value = AA;

Here is the problem. The generated information are not all in a row. Instead, they are break into many rows like the below:

Cruise #
1
, Year:
2015
, Month:
10
.

Instead of the desired format of

Cruise #1, Year: 2015, Month: 10.
...

Why is Matlab automatically adding newlines? How should I fix this issue?

Many thanks.

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Answer 1

Leon 2021-3-16

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https://ww2.mathworks.cn/matlabcentral/answers/772108-matlab-textarea-automatic-new-line-issue#answer_649297

在 MATLAB Online 中打开

It turns out that the issue are the square brackets. Once I replace them with strcat, everything works perfectly now.

Before:

AA = [AA, 'Cruise #', num2str(cruiseList(i)), ', Year: ', ...
            Sta{Ind1}.year, ', Month: ', Sta{Ind1}.month, '.'];

After:

AA = strcat(AA, 'Cruise #', num2str(cruiseList(i)), ', Year: ', ...
            Sta{Ind1}.year, ', Month: ', Sta{Ind1}.month, '.');

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Answer 2

Asvin Kumar 2021-3-16

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https://ww2.mathworks.cn/matlabcentral/answers/772108-matlab-textarea-automatic-new-line-issue#answer_649272

It's possible that the TextArea has WordWrap property set to 'on' by default.

If that doesn't solve it, you could try a couple of things:

Set a breakpoint at the line where you set the TextArea's Value. Verify whether AA is a character vector without newlines.
If you suspect that newlines are getting added later, try using sprintf to construct the string which you want to assign to TextArea. Example on using sprintf is here.