Saving images inside a loop with changing filename

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Levente Gellért
Levente Gellért 2023-1-13
评论： Levente Gellért 2023-1-14
Dear Community, in a similar situation I would like to save images inside a loop. I do not know why there is an invalid character error in the filename. The filename should look like: actual foldername, Roi and a number.
Please share your suggestions:
Best:
lg
I=rand(20,20);
[~,fo{1,1},~]=fileparts(pwd);
for i=1:10
index=i
imwrite(I,'[ fo{1,1} '_' 'Roi' '_' num2str(index)].tiff')
end

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采纳的回答

Matt J
Matt J 2023-1-14
编辑：Matt J 2023-1-14
I=rand(20,20);
[~,fo{1,1},~]=fileparts(pwd);
for i=1:10
index=i
imwrite(I, fo{1,1} + "_Roi_" + index + ".tiff" )
end

更多回答（1 个）

Walter Roberson
Walter Roberson 2023-1-14
编辑：Walter Roberson 2023-1-14
Ran in:
imwrite(I,'[ fo{1,1} '_' 'Roi' '_' num2str(index)].tiff')
Invalid text character. Check for unsupported symbol, invisible character, or pasting of non-ASCII characters.
You start a character vector. The first character of the vector is the '[' character. The second character is space. The third character is 'f' then 'o' then '{' then '1', ',', '1', '}' then space. You then end the character vector. After that you have an underscore immediately after the end of the character vector . But the underscore is not part of a variable name and is not a valid variable name by itself, and underscore is not a valid operator name. The underscore is invalid there.
I suggest you use
filename = fo{1,1} + "_Roi_" + index + ".tiff"
imwrite(I, filename)

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