# How can I predefine the variable ranges used within a Manipulate? [duplicate]

I would like to use a Manipulate environment with a large number of manipulable (?) variables, say {x1,0,1},{x2,0,1},{x3,0,3},etc. Rather than define them all directly in the Manipulate[], I'd like to define them ahead of a time, in a different cell.

How do I do this? The obvious solution, to make a list of ranges:

ranges={{x1,0,1},{x2,0,1},{x3,0,3}};
Manipulate[f(x1,x2,x3), ranges]


doesn't work, presumably because of the outer braces. But there appears to be no way to pull out the contents of the list without putting them in a new list; for instance ranges[[All]] returns ranges itself rather than its contents. But ranges[[1]] works just fine, that's not a list with one element but rather the element itself. Is there a way to get all of the elements out of ranges for use inside a Manipulate?

• Manipulate[f[x1, x2, x3], Sequence @@ ranges // Evaluate] Oct 3, 2017 at 20:52
• @march: Fine answer. I suggest you post it so it can be accepted and others not be drawn to this (solved) question. Oct 3, 2017 at 22:22
• @DavidG.Stork. Except, I'm almost certain that this is a duplicate question, I just can't find it. Oct 3, 2017 at 22:23
• @DavidG.Stork. Well, maybe this one in the Related sidebar (although it's a little more complicated). Oct 3, 2017 at 22:25
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