Hi Ed,
The “gzip” command is designed to compress individual files rather than creating a single archive containing multiple files. Hence a separate .gz file will be created for each .nii file.
A workaround to create a combined .gz file is to use the “tar” function along with “gzip”. The “tar” function combines multiple files together into a single .tar file, which can then be compressed using “gzip” :
%Concatenate all .nii files into a single .tar file
tar("MyTar","*.nii"); %Replace MyTar with the desired output file name
%Compress the .tar file with gzip
gzip("MyTar.tar");
%To get the compress files back, use gunzip and untar
gunzip("MyTar.tar.gz");
untar("MyTar.tar");
More details on the “tar” and “untar” functions can be found in the following documentation:
Hope this helps!
