MATLAB writing text file “invalid permission” in UBUNTU

I'm trying to use MATLAB to write a text file in a folder other than "current folder" in UBUNTU. This folder is located in home directory so there would be no permission problem. I'm using the code that is shown below:

folder = '~/newFolder';
s1=fopen(folder,'newText.txt','w');
fprintf(s1,'hi')
fclose(s1);

But when I run the program, it shows invalid permission error. It would worth to mention that I've no problem when I try to write the text in the current folder. I also tried chmod 0777 -R ~/newFolder to modify the permission with no success. What shall I do?

Thanks

Answer 1

[per isakson]

Doc says: fileID = fopen(filename,permission).

• permission is the second argument.
• filename is the full file specifier

Thus, replace

folder,'newText.txt'

by

fullfile( folder, 'newText.txt' )

[mohammad]

Thank you very much