how to save a string as a filename?

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Subrat kumar sahoo
Subrat kumar sahoo . 2012년 7월 5일
댓글: Amir Pasha Zamani . 2020년 9월 19일
Hi, How to save a file "with the characters of a string" as the file name? For example, I have a piece of code, which generates a sting output "case study_# " and the number (#) changes each time I feed in different inputs. I want the name of the output file to be saved, based on the string output. Thanks, Subrat

채택된 답변

Thomas 2012년 7월 5일
편집: Stephen23 님. 2017년 2월 17일
Maybe something like this
for number=1:10
file_name = sprintf('case study_#%d.txt',number);
  댓글 수: 1
Amir Pasha Zamani
Amir Pasha Zamani 2020년 9월 19일
It doesn´t work for me
My code is something like this:
for Animal=1:N
Data = {rand(2,2) ; rand(3,3)};
file_name = ['Animal_' , num2str(Animal)];
save (file_name , Data)
But when I run it, I get the error:
Error using save
Argument must contain a character vector.
Can anyone help please?

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추가 답변 (2개)

Jan 2012년 7월 7일
This is an evergreen question, See FAQ: How to process files in a loop.
It is strongly recommended to read the other frequently asked questions also. It is worth to profit from the problems others had already.

Albert Yam
Albert Yam 2012년 7월 5일
for i=1:2;
save(['test_' num2str(i)]);
  댓글 수: 1
Albert Yam
Albert Yam 2012년 7월 6일
I'm quoting your response, in case it can help someone else.
For example, if the name of the sting is 'a' and it generates the output as "case_study_test_simulation"
a = case_study_test_simulation;
then I expect the saved file to have the file name as "case_study_test_simulation.mat." Instead, I end up getting the file name as "a.mat."
From what I understand (I'm writing it out as 'I' would read it), you have a variable 'a' that contains a string 'case_study_test_simulation' (as opposed to string string a). so
a = 'case_study_test_simulation'; %note the quotes
save(a) %this will produce what you are asking for
save('a') %will produce a.mat
This is because Matlab reads string 'a', not variable 'a' (that contains string 'case_study_test_simulation'

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