How to save the elements of an array one at a time in a .mat file?

조회 수: 3 (최근 30일)
Sundar Aditya
Sundar Aditya 2015년 4월 16일
답변: Abhishek GS 2015년 4월 17일
Consider the following loop:
for i=1:100
X(i) = 2*i;
end
I would like to save the values of X, one iteration at a time, as and when it is generated, in a .mat file. This is the code I tried:
fopen('test.mat','a+');
for i=1:100
X(i) = 2*i;
save('test.mat','X(i)','-append')
end
This is the output I got 'X(i) is not a valid variable name'. When I try
save('test.mat','X','-append')
instead, I get the error 'Unable to write to MAT-file. File may be corrupted'. Is there a solution?

답변 (1개)

Abhishek GS
Abhishek GS 2015년 4월 17일
Hi Sundar,
Assuming you need a representation of the variable and the iteration number in the .MAT file, you could try something like this.
for i=1:100
X(i) = 2*i;
varname=sprintf('X_%d',i);
assignin('caller',varname,2*i);
if (exist('test.mat'))
save('test.mat',varname,'-append')
else
save('test.mat',varname)
end
end
Hope this helps,
Abhishek

카테고리

Help CenterFile Exchange에서 Workspace Variables and MAT Files에 대해 자세히 알아보기

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by