How to save to mat file

Question

Carol 2013-8-27

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/85736-how-to-save-to-mat-file

评论： Walter Roberson 2017-12-20

采纳的回答： Iain

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Hi All,

I am having some problem now and need to solve it urgently. Please help.

imep=W4/(pi*b^2/4*s);
eta=W4/mass1*(1+phi*0.06548*(1-f))/phi/0.06548/(1-f)/47870/1e3;
timefinish=cputime;
timetaken=timefinish-timestart;
% save all data
save ahrind.mat
clear

I am having some error.

*Error using save Unable to write file ahrind.mat: permission denied.

Error in ahrind (line 80) save ahrind.mat *

Can I know how can I save the file to mat format.

Thanks.

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Answer 1

Iain 2013-8-27

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Looks like you're trying to save a file to either, an open file (try "fclose all"), or a file location that you do not have permission to write to.

If someone else has the file open, "fclose all" will do nothing. If you don't have write access, you need to talk to your admin. - But you should be able to save it somewhere only you can see, like:

save 'D:\my document folder\matlab stuff\test.mat'

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Carol 2013-8-27

It works 10 years ago.:)

this works.

I am curious why I cant save it directly.

I saved the files in my dekstop folder and created the path accordingly.

Image Analyst 2013-8-27

What is the "current folder"? If it's something under c:\program files and you're using Windows7, you won't be able to do that.

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Answer 2

the cyclist 2013-8-27

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Just a guess, but this seems to be a system problem, not a MATLAB problem.

It seems you do not have write permission in the directory where you are running this code.

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Ashish Rawat 2017-9-30

How can i get the permission?

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Answer 3

Jan 2013-8-27

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The message means, that you do not have write permissions in the current folder. So either obtain these permissions (perhaps by asking your admin), or write the data to another folder:

save(fullfile(tempdir, 'ahrind.mat'))

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Answer 4

Getinet Amare 2017-12-20

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The message means, that you do not have write permissions in the current folder. So either obtain these permissions (perhaps by asking your admin), or write the data to another folder:

save(fullfile(tempdir, 'getinet.mat')) to load the file you saved you can use the following command i.e. simply change the save command to load and leave the rest as it is load(fullfile(tempdir,'getinet.mat'))

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Walter Roberson 2017-12-20

Systems administrators might delete temporary directories without notice. Also, some operating systems delete temporary directories upon every reboot. Some "system performance enhancing" software delete the temporary files as well.

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