It has index (page) and index (vol) for array. It does not describe in "help manual". How to use it?

[cocomoney]

It has index (page) and index (vol) for array. It does not describe in "help manual". How to use it?

[altenbach]

They are just dimensions. If you have e.g a 4D array, you need four indices to define the position of one element.

[Bob_Schor · Accepted solution]

It is often helpful to carefully read the Detailed Help on functions you don't understand.  Here is part of Index Array:From Detailed Help, Index Array

Bob Schor

[cocomoney]

I am so grateful. Thank you for your help.