Display mutiple lines in Text area in Matlab App designer

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I have attached my code below.
for a = 1:length(my_Files)
baseFileName1 = my_Files(a).name;
fullFileName1 = fullfile(myDir, baseFileName1);
i = imread(fullFileName1);
if max(max(i)) == 255
char6 = sprintf('%s has the presence of tumour \n',baseFileName1);
app.TextArea3.Value = char6;
c=c+1;
end
end
I want the text area to display multiple lines like,
Image 1 has the presence of tumour
Image 2 has the presence of tumour
Image 3 has the presence of tumour
Image 4 has the presence of tumour .......
But I get only the last image name in the text area and i coudnt get all the image names as multiple lines.
Image 127 has the presence of tumour
I need someone's help to sort this out.
Thanks in advance.
  6 Comments

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Answers (1)

Rik
Rik on 6 May 2022
Edited: Rik on 9 May 2022
You are replacing the text every iteration. What you need to do is concatenate them.
Start with an empty line before the loop, then append the new results in your loop.
Edit:
for a = 1:numel(my_Files)
baseFileName1 = my_Files(a).name;
fullFileName1 = fullfile(myDir, baseFileName1);
im = imread(fullFileName1);
char6 = '';
if max(im(:)) == 255
if isempty(char6)
char6 = sprintf('%s has the presence of tumour',baseFileName1);
else
char6 = sprintf('%s\n%s has the presence of tumour',char6,baseFileName1);
end
app.TextArea3.Value = char6;
c=c+1;
end
end
  2 Comments
Rik
Rik on 9 May 2022
You can also use a cellstr instead of a char vector:
for a = 1:numel(my_Files)
baseFileName1 = my_Files(a).name;
fullFileName1 = fullfile(myDir, baseFileName1);
im = imread(fullFileName1);
char6 = '';
if max(im(:)) == 255
if isempty(char6)
char6 = {sprintf('%s has the presence of tumour',baseFileName1)};
else
char6{end+1,1} = sprintf('%s\n%s has the presence of tumour',char6,baseFileName1);
end
app.TextArea3.Value = char6;
c=c+1;
end
end

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