[R] Filtering an Entire Dataset based on Several Conditions

[Paul Bernal]

Dear friends,

I have a dataframe which every single (i,j) entry (i standing for ith row,
j for jth column) has been normalized (converted to z-scores).

Now I want to filter or subset the dataframe so that I only end up with a a
dataframe containing only entries greater than -3 or less than 3.

How could I accomplish this?

Best,
Paul

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