[Paraview] Saving one data array into one file

[amayt]

Dear all,

I have an image data that has been generated with multiple data arrays
based on the 'Append Attributes' filter.  e.g., a data array a is
generated by b+c.  When saving this sort of data, all the arrays
contained (e.g., arrays a, b, and c) are saved into one file.  I'd
like to know how to save just one array (e.g., array a) into one file.

I'd appreciate any comments.

Thanks,

Amayt